Java Training in Chennai

Java Trainer Profile & Placement

Our Java Trainers

• More than 15 Years of experience in Java^® Technologies
• Has worked on multiple real time Java projects
• Working in a top MNC company in Chennai
• Trained 3000+ Students so far.
• Strong Theoretical & Practical Knowledge
• OCJP certified Professionals

Java Placement Training in Chennai

• More than 1000+ students Trained
• 90% percent Placement Record
• 1000+ Interviews Organized

Java Training Locations in Chennai

Our Java Training centers

• Adyar
• Ambattur
• Adambakkam
• Anna Nagar
• Anna Salai
• Ashok Nagar
• Choolaimedu
• Chromepet
• Ekkattuthangal
• Guindy
• Kodambakkam
• Madipakkam
• Mylapore
• Porur
• Saidapet
• T. Nagar
• Tambaram
• Vadapalani
• Velachery
• Villivakkam
• Virugambakkam

Java Training batch size in Chennai

Regular Batch ( Morning, Day time & Evening)

• Seats Available : 6 (maximum)

Weekend Training Batch( Saturday, Sunday & Holidays)

• Seats Available : 5 (maximum)

Fast Track batch

• Seats Available : 7 (maximum)

Java Interview Questions and Answers

Before attending any Java interview it is important to know about the expectations of the company. Basic knowledge in Java programming along with the latest advancements in the core java with java SE8 like the lambda expressions, streams, Java data, and time API are key points to be remembered before attending the interview. Start answering the questions with the challenges and industry techniques of Java that are related to your previous profile. New features in Java 10, like the local-variable type interface, implementation of additional Unicode extensions of BCP 47 language tags, enable the hotspot VM and allocate the Java object heap on another device, the root certification authority certificates in the JDK. JAVA Training in Chennai at TIC Academy helps the learners to acquire holistic skills in Java and excel in their careers.

OOPS is an important topic that can be learned by joiningJava Training in Chennai. JDBC skills and framework knowledge are the important skills required to evaluate the skills of the candidate. Let me discuss some of the tips to crack the Java Interview. The tips can be broadly divided into two categories such as knowledge preparation and mental preparation. Let us deep dive into the topic. The subconscious preparation is nothing but the practical knowledge which is realized by constant practice into the concepts of Java provided by Java Training in Chennai at TIC Academy.Java Course in Chennai at TIC Academy trains the students with mock interviews which gives an idea to handle the interviews with proper planning for the time taken for each question.

1. When was Java Launched?

Java was launched in the year 1995 and it has undergone various changes in the past 23 years. It is a high-level programming language that runs on Windows, Mac, and other variations of UNIX.

2. List out the platforms supported by the Java?

Windows, Mac, and UNIX/Linux are some of the platforms that support Java. The UNIX or Linux supports Ubuntu, red hat and sun Solaris.

3. Which function in java makes it executable on other processors?

The compiler in the JAVA saves the file as an architectural-natural object file format. The architectural format aids the compiled code to be executable on various processors. Java Training in Chennai at TIC Academy provides opportunities in multiple industries and makes the students know about the scope of Java from the best Java Training institute in Chennai.

4. What is a class? What is the difference between the class and interface in Java?

A class is a template that is used to create the objects, define the data types, and methods. The class properties are mentioned in the class objects. An abstract class is used for the instance methods and it is used to implement a default behavior. An interface can declare different constants and implement a default behavior. An abstract class has only one member like private and protected whereas interface has all public members. Java Training in Anna nagar at TIC Academy is shaping the lives of thousands of students to make a successful career.

5. Where static variables, static methods, and static classes are used in Java?

Static things are used in Java with a block of code in any class indicate the virtual machine starts and the instances are created before itself.

6. How to handle the immutable object in Java?

The immutable objects are non-final but private. The immutable objects are changed using the constructor. The mutable object should be prevented from leaking any reference from that member.TIC Academy is widely recognized as the best JAVA Training Institute in Chennai providing in-depth knowledge about java and oops concepts which are the base for multiple other technologies.

7. What is the use of a singleton class?

The singleton class is used to create an object, restrict the number to one and provides flexibility to create objects if the scenario changes.

8. Write the value of the float and double in Java?

The value of the float is 0.0f and the value of double is 0.0d.

9. What is Erasure?

If the runtime has no idea about types of generic objects like list<integer> then it is called as Erasure. This is the JVM phenomenon for the generic objects. JAVA Training in Chennai at TIC Academy trains the students with a clear knowledge about the development environment, run time environment and coding for the virtual machine.

10. How Dot operator is used in Java?

The dot operator is used to access the variables, methods of the class objects and sub-packages from a package.

11. How objects are transformed into bytes in java?

Serialization is the process in the java where the objects are transformed into bytes in Java. Best JAVA Training in Chennai at TIC Academy trains the students to write generic and reusable codes to gain in-depth knowledge in coding.

12. How to share objects securely in multi-threaded programming like java?

String class is used to share the objects as it is immutable.

13. Explain the terms Map, hash map, hashtable, and treemap in Java?

The map is an interface, Hashmap implements a map, hashmap is unsynchronized and supports null values and keys, a hash table is the same as the hash map but it is the synchronization version, treemap is similar to hash map but uses the tree to implement the map in the Java programming. Java Training with well-organized classes and good learning strategies will sharpen the programming skills of the learners.

14. What is the result of the hash code function?

A weak hash code function will result in frequent collision in Hashmap and this leads to increase the time to add an object.

15. Explain the importance of the getters and setters in Java?

The setters and getters use the interfaces and it will hide the implementation details. This process of hiding is helpful to make the member variables public in java. Java Course in Chennai at TIC Academy offers training in right-sized batches and project-oriented classes which aids for the continuous learning and in-depth knowledge of the learners.

16. Is it possible to run the JVM with the same class and many packages? Explain.

Yes, it is possible because it loads the class with one time only and the same package can be imported with the same class in the Java Training in Chennai.

17. What is the function of throw and throws in JAVA?

Throws are used for the declaration of the exception and throw is used to trigger the exception. Best JAVA Training in Chennai offers java courses with expert trainers because they know that JAVA is a programming language with the highest demand globally.

18. Describe the significance of the order in the statements for FileNotFoundException and IOException?

FileNotFoundException is inherited from IOException and the exception’s subclasses are caught first.

19. What is the difference between ready state and wait state in Java language?

The yield() method is used for the ready state and the Sleep() method is used for the wait state. JAVA Training in Chennai at TIC Academy offers customized Java course in Chennai for beginners and experienced professionals.

20. Which class is used if the exact size of the array is not known?

Vector class is used to implement an array of objects which grows and it is used to know the exact size of the array.

21. Mention the bits used to represent Unicode, ASCII, UTF-16 and UTF-8 characters?

Unicode uses 16 bits, ASCII uses 7 bits, ASCII uses 8 bits, UTF-8 uses the 8 or 16 or 18-bit pattern, UTF-16 uses 16-bit and larger bit patterns to represent in JAVA programming. JAVA Training in Porur at TIC Academy trains young minds to acquire the full focus into the programming and help to get placed within a short time.

22. What is the use of the Applets?

The applet viewer or web browser is used to transform the small program from one computer to another computer.

23. How to write applications in different languages to serve different countries?

A locale is an object which is full of geographical, cultural and political information. This object helps with custom codes and conventions to write applications in different languages.

24. Describe the benefits of java package?

Java package is used for organizing projects which consist of multiple modules and they protect them from unauthorized access. Core JAVA Training in Chennai at TIC Academy is the best course for the beginner as core java is used in programming, automation and also to use the DevOps.

25. Is it necessary to import java.lang package in the JVM?

No, it is loaded in the JVM by default.

26. Explain the terms public, static, void and main in the JAVA?

The public explains the access modifier and it specifies that it can be accessible by any class. Static is accessed without creating an instance, the void will not return any value, main is the method where the main execution occurs and it is the starting point for any application with a particular signature only, and the string is the parameter to be passed to the main method. Join the Java Training Course in Chennai and join the Java community which is the biggest community in the world.

27. Justify the statement that Java is not 100 percent object-oriented programming language?

Encapsulation, data hiding, inheritance, polymorphism, abstraction, predefined types, defined types, and all the operations are through the methods exposed at the objects shows that Java is an object-oriented programming language. The primitive data types such as boolean, byte, char, int, float, double, long, and short shows that java is not an object-oriented programming language.

28. What is the purpose of the wrapper classes?

The wrapper classes convert the primitives in to reference types and every primitive data type is wrapped with a class.

29. What are the two types of constructors in JAVA?

Default constructor and parameterized constructor are the two types of constructor in Java.

30. List some of the differences between the array list and the vector?

Array List is not synchronized and vector is synchronized, Array list is fast and vector is slow, Array list increases the array size by 50 percent, vector is double the size of its array, array list does not define the increment size and vector defines the increment size, and array list can only use iterator and vector uses both enumeration and iterator except hash table. J2EE Training in Chennai is conducted with a focus to help the learners to gain in-depth knowledge in java.

31. Bring out the differences between equals() and ==?

Equals() is used for the object class in java and it is used for equality between two objects. == is a binary operator that compares the primitives and objects.

32. List out the differences between heap and stack memory?

The stack memory use the one thread of execution, heap memory uses all parts of the application, stack memory cant access the other threads, objects stored in the heap are accessed globally, the system in stack is called as LIFO, the system in the heap is based on generation, stack exists until the end of the execution, heap is from the start to end, stack memory contains the primitive and reference variables, heap memory contains all the objects. JAVA J2EE Training in Chennai is the best training to enter into the software world and get on-site jobs.

33. Mention some of the features in JAVA9?

Java 9 REPL (Jshell), java 9 module system, factory methods for immutable list set Map and map entry, private methods in interfaces, reactive streams, and GC improvements are some of the features in the java9 which makes it a popular language.

34. Mention some of the features in Java 8?

The important features in Java 8 are interface changes with the default and static methods, functional interfaces and Lambda expressions, java stream API, and java date-time API. These features made the JAVA as a popular and high programming language. JAVA Training in Tambaram at TIC Academy provides high-class training with real-time projects to hone the technical skills of the learners.

35. Is it possible to write the java program in windows and run it in Mac OS?

Yes, it is possible to write a java program in windows and run it in Mac os as it is an independent platform which is open to any operating system.

36. Differentiate JDK and JVM?

JDK is for the development and JVM is to execute the java programs. JDK provides tools executable and helps for the debugging. JVM is used to execute and it is machine-independent.

37. Differentiate JVM and JRE?

JVM is for implementation and JRE is for the execution. JRE does not have the tools and it is for the installation. JAVA Course is the widely learned course and it has many online materials also to help the beginners.

Java, Javascript, C#, Python, C++, C, PHP, Ruby, Go, Perl, PL/SQL, Scala, Objective C, Apex, R, Swift, SAS, MATLAB, Crystal and scratch are the demand sequence of the programming languages around the world as per the Stackify Research. Thus the most in-demand language across the world is JAVA. So, learning JAVA is the best option to enter into the software industry.

38. Describe the term static block?

Java static block is used to create static resources when the class is used and the memory in the java class Loader execute the group of statements in the Java static block.

39. Describe the term interface?

Interfaces are the hierarchy of code and it is a core part of the programming language. It is used in the JDK which consists of the tools required for the development. It is used in JDK, design patterns, frameworks, and tools. It provides a contract for the subclasses to implement and also it is used to achieve abstraction in java. Java class is used to implement multiple interfaces and mostly interface is used to implement the superclass.

40. Explain the abstract class in JAVA?

Classes and methods for the subclasses are created using the abstract class. The methods with implementation and the methods without body are created using the abstract class. An abstract class is created with the abstract keyword. To override the methods in the abstract class, to implement the abstract methods in the abstract class and it is the base for the subclasses in Java. JAVA Course in Chennai at TIC Academy explains the advantages of java like the huge number of libraries, graphics, sockets, and multi-thread in Java.

41. Differentiate the abstract class and interface in JAVA?

The abstract class wants an abstract keyword to create a class and interface is used as a keyword for the interfaces. There is method implementation in the abstract class, whereas there is no method implementation in the abstract class. During implementation, only one abstract class is used and many interfaces can be used. An abstract class is run with the main() method and it is not possible to run interface with main() interfaces. Searching for the best Java Training Institute in Chennai will land you at TIC Academy where best-in-class training is provided along with 100% placement assistance.

42. Is it possible to extend an interface?

Yes, it is possible to extend an interface and that is the reason why we have multiple interfaces. JAVA Training Institute in Chennai operates with a motive to help the young engineers and experienced professionals to gain in-depth knowledge in Java.

43. What is the new feature in java 8 for the interfaces?

After Java 8, the interfaces are implemented with the default method and it is easy to handle the diamond problem with multiple interfaces. Java course in Chennai at TIC Academy provide the flexible timings and peer approach to make the learning place an interactive experience.

44. Describe the term marker interface?

Some functionality in Java implement classes by Java and these functionalities need a market interface to force the implementation. The market interface is empty and it is used for the functions like serialization and cloneable. Join the Best JAVA Training Institute in Chennai at TIC Academy and know about the pros and cons of the java language to use it effectively.

45. Which feature in the java makes the conversion between primitive types and wrapper classes easy?

Java 5 autoboxing and unboxing make the primitive types and the wrapper classes’ conversion easy. Java Course is the best course among all other courses as there is a huge demand for java programmers in the software industry.

46. Describe the term Ennum in Java?

Ennum has fields with a fixed set of constants and it is introduced in Java 1.5. Ennum is used to create a direction such as EAST, WEST, NORTH, and SOUTH. Enum constants are static and final and used to create an enum type. Ennum type is similar to the class in Java. Java Training in OMR at TIC Academy provides the best training to gain all the skills required to enter into the development environment and work towards the perfection of the product. TIC Academy trains the candidates with the Java SE which clearly explains the Java Enterprise Software application development and the other environments of java are web application development, mobile application development, java application migration, java application maintenance, java application testing, java custom application development, java desktop application development, java cloud application development, java CMS development, Java application development, java application integration and java application support.

47. Describe the term Java Annotation?

Java annotations are the Metadata about the program and it is embedded in the program itself. Java annotations provide information about the code and it can be parsed by the annotation parsing tool or by the computer. Some of the annotations in Java are @Override, @Depreciated and @Supresswarnings. Best JAVA Training in Chennai at TIC Academy operates with a motto to provide the best education and increase the global presence of the Indian students in the employment Industry.

48. Describe the term Java reflection API in Java?

The run time behavior of a java application is inspected and modified with the Java Reflection API. The reflection API violates the rules of access modifier and breaks the design patterns such as singleton pattern by invoking the private constructor. Reflection help for the processing of the frameworks like spring hibernate or tomcat.Java course in Chennai at TIC Academy is the best course to enter into the software industry and many web applications, desktop applications, and mobile applications that use Java.

49. What is composition in Java Training in Chennai?

The composition is used to reuse the code and it is a design technique to implement has a relationship in classes. Java composition uses the instance variables and other objects. The visibility of other objects is controlled by using the java composition. The objects needed are reused and controlled by using composition in Java. There are so many online materials available for Java that give practical knowledge to the students which are highly needed to clear the interview in the top companies.

50. Compare the benefits of composition and inheritance?

In the composition method change in the superclass might affect the subclass. If the method in the subclass and the method in the superclass are different then there are chances for the compilation error but in the composition, this will not happen. Inheritance is designed with a model that exposes all the superclass methods and variables to the client. There is no control and it is not possible to design the superclass. The inheritance binds the classes of compile-time in the run time binding under composition. When invocating the methods the composition provides flexibility. Best Java Training in Chennai at TIC Academy with 100% Placement support, helps the students for the placement with regular updates and the students’ review is the impact which shows that students are placed immediately in the top companies.

51. Mention the sorting methodology in Java?

In a collection, a comparable interface is used to sort the custom objects. The compareTo is the method used for the sorting method in the Comparable interface. If there is a specification in the sorting methodology then comparator instances are used. JAVA Course in Chennai knows about the struggle in understanding any programming language and by joining the course, the students get the confidence to take up the interview as they get the desired output from the input.

52. Explain the inner class in Java?

Inner class accesses the variables and methods from the outer class and they are called as the nested classes. Inner classes are non-static nested classes. Static variables are not there in the inner classes as it is associated with the instances. Java Coaching Centers in Chennai is helpful to understand the simple, clean and well-designed language and makes the programming language as the interesting one to learn intensively.

53. Explain the term anonymous inner class in Java?

Anonymous inner class is a local inner class without a name. It is defined with a single statement and it always extends a class and implements an interface. Java Training Institute in Chennai is widespread all over Chennai to make the learning as a comfortable task to the students and learn the course within the given period to accomplish the other task to pursue the career.

54. Describe the term class loader in Java?

The byte code program in the memory is loaded into the Java class loader to access any class. To access any class the class loader is created and it is extended to the ClassLoader class. The method used in the class loader is the loaded Class (String name) method. Java Training in Velachery at TIC Academy covers the java course in two models and they are the basics for the fresher and advanced for the experienced.

55. Mention the three types of built-in class loaders in Java?

Bootstrap class loader, extensions class loader, and system class loader are the three types of the class loader in Java. Java Training in Tambaram at TIC Academy serves the learners in and around Tambaram with expert trainers and impart quality education.

56. Explain the term bootstrap class loader?

The bootstrap class loader is used to load the rt.jar and other core classes. Bootstrap class is used to load the internal classes. Java Courses in Chennai at TIC Academy makes the real problems easy and it provides practical knowledge to handle the problems in the development environment.

57. Explain the extension class loader in Java?

Extensions class loader is used to load the classes from the JDK extensions directory. Join the Java Training in Adyar and get placed in the top companies.

58. Describe the System class loader in Java?

If -cp or -classpath command-line options are used to load the classes from the current classpath to invoke a program. Join the Core Java Training in Chennai at TIC Academy to gain the basic knowledge which is the base to learn other technologies evolving now.

59. Describe the term ternary operator in Java?

The three operands are the conditional operator used in the Java ternary operator. This is the replacement for the if-then-else statement and the ternary operator is the if-else condition. Java Course in Chennai at TIC Academy is the best course to make a career with handsome salary package in the software industry.

60. What is the function of the super keyword?

The superclass method needs a super keyword to access the class. In the constructor method, the first statement is the super keyword. It is used to invoke the SuperClass in the constructor. J2EE Training in Chennai is suitable to know about the operations in the big companies and handle the big projects.

61. When the break or continue statement is used in Java?

Break statement is used in the switch case and continue statement is used to skip the current iteration of for, while or do while in the loop and this is used with a label to the current iteration.

62. Describe the term this keyword?

The reference to the current object is mentioned with the keyword. This is mostly done when the object variables are used. Java Training in Velachery at TIC Academy provides quality education and clear the doubts of the students to turn them into industry-ready developers.

63. Which file supports more than one java class in Java?

.java files support more than one java class.

64. Explain error handling in stored procedures?

The error codes are returned by the stored procedure and if it fails to return the error code then the catching SQL exception will resort to the error code.

65. Which element is used to perform the indexed search in a list of objects?

An array list is used to perform the indexed search in a list of objects. The JVM makes java as a secure language

66. What is the function of the file class?

The file class is used to access the files and directories from a local system.

67. What is the process or the life cycle of applets?

Initialization, starting, stopping, destroying and painting are the process or life cycle of applets. Joining the JAVA Course in Chennai at TIC Academy is the best option to enter into the software industry and Java is the gateway to the other technologies.

68. Which method is used in the Applet class to load an image?

The get Image is used to load an image in the Applet class.

69. What is the OOPS concept in Java which made it a robust language?

Abstraction, encapsulation, polymorphism, inheritance, association, aggregation, and composition are the OOPs concepts in java which says about the objects and the operations. The OOPS concept makes the code as reusable code with minor changes.

70. What is the difference between Java and JVM in java?

Java is the independent platform and it works with the OOPS concept. Java code is used anywhere with minor changes which makes Java platform-independent. JVM is not platform-independent and JVM differs as per the usage of the operating system.

71. Differentiate JDK and JVM in java?

JDK is the tool used for development and execution. JVM is used only for the execution. Join the JAVA Course in Chennai to explore the big companies where there is a huge opportunity to explore different usage of Java.

72. Differentiate JVM and JRE?

JRE is the tool used for the execution. JRE uses JVM, other java classes and other java binaries to execute the java program. To execute the java programs it is mandatory to install the JRE tool. Development and execution are taken care of by different types of tools in the JAVA.

73. Which element in java supports the multiple inheritance?

Interfaces in java support multiple inheritance. The interface takes care of the methods and the implementation class takes care of the implementation. So, it is possible to use multiple inheritance in java. By knows about the demand in the global market and train candidates to match the job market.

74. Differentiate path and classpath variables?

The path is used to add the directory location to locate the executables in Java. The classpath is used to locate the class and the classpath location is added to the classpath variable. The classpath location can be a directory, ZIP files, and JAR files. The path is used to locate the executables and classpath is used to locate the class files. Java is the renowned technology to learn which has a good number of followers all over the world and JAVA Course in Chennai will bring out excellent talents to the job industry through training.

75. Explain the main method in Java?

Java’s main method is accessible during runtime without initializing the class. Java’s main method is public and static to pass the runtime arguments to java. The input parameter is used to pass the runtime arguments to java.

76. Differentiate the term overload and override in Java?

The name is the same but the arguments are different for more than one method then it is called as overloading in Java. If two methods have the same signature then it is called as overriding in Java. The override annotation is used in the child class to make sure whether the parent class is changed. The parent class and the child class has the same signature. Java Training Institute in Chennai offers the course with customization and updates as per the industry standards.

77. Is it possible to have multiple public classes in java source file?

No, it is not possible to have multiple source files in the java source file. One public class is allowed to Java and the other multiple classes are not public.

78. Explain the term Java package in java and by default which package is imported?

The java classes are grouped as per the functionality of modules and this mechanism is named as java package. No need to import any class from the package and the java.lang package is imported by default. Java Training Institute in Chennai holds the responsibility to produce good java programmers and hence the training institutes provide good counseling as per the qualification of the individuals.

79. Mention the different types of access modifiers in Java?

The different types of access modifiers are public, private, protected and default access modifiers in Java.

80. When final key work is used in Java?

To make sure that the class has ended and can’t extend the class the final keyword is used. The child class can’t override the final keyword. Java Training in Chennai at TIC Academy provided by expert trainers makes the programming language easy to learn.

81. When a static keyword is used in Java?

The static keyword is used in Java to make it global. A static keyword can be used with class-level variables and methods. A static method invokes the static methods and accepts the static variables.

82. Differentiate finally and finalize in Java?

Finally block is used to execute the code and it is used along with the try-catch block. To release the resources in the try block the final block is used. Finalize () is used to override in the class and it is the special method in Java. When the garbage is collected then this method is called and the resources are released. Java Training in T Nagar at TIC Academy opens the door of opportunities to be placed in your dream career in the highly competitive software industry.

83. Is it possible to declare a class as static?

Yes, it is possible to declare an inner class as static but it is not possible to declare a high-level class as static. The declared inner class is called a static nested class. The classic inner class is nested for packaging convenience and it is the same as any other class.

84. Explain the term static import?

If the method or class from another class is used then it is imported to the class with the class name. This is known as a static import. If the static import is overused in the program then it will make the program as unreadable or unmaintainable. Java Classes in Chennai provides practical oriented training and clear the doubts of the students with immense patience.

85. Explain the resource management in Java 7?

The try with resources statement in java 7 is the automatic resource management system. Earlier the resources are closed with finally block and try-catch statement. There was a memory leak in this system and hence the try with resources statement is used to close if it gets finished.

86. Explain multi-catch block in JAVA?

The multi-catch block is used to catch multiple blocks and it is the new improvement in java 7. Ever catch block has a similar code in the multi-catch block and it makes the code shorter and cleaner. Pipe (|) is used to separate the exception and (ex) is used to final exception. Java Classes in Chennai to create the best experience and bring a change in the life of the students through knowledge.

87. What is new in Java 8 regarding the interface?

Interfaces are generally extended and it is not possible to implement the interface. The new features in Java 8 are that it has a default method and it is present in multiple interfaces. The implementation method is provided in the implementation class in Java. Core Java Training in Chennai teaches the Java language from the basics for the students from the IT background and also to the students from the non-IT background.

88. Explain the Java reflection API?

The reflection API inspects the java application during the run time. The java class, interface, enum, and their methods are inspected. Reflection API is highly used in the java frameworks.

89. What is the use of using composition in Java?

Java composition helps to reuse the code. The visibility of the other objects is controlled and it is easy to reuse only the object which we need by using the composition in Java. Best JAVA Training in Chennai imposes the best possible ways to overcome the challenges in the field of software development.

90. How to sort objects in Java?

To sort custom objects in Java are sorted using the comparable interface and this leads to the default way to custom objects collection. If there are criteria in sorting the information then comparator instances are created to sort the data.

91. Explain about the default constructor?

If there is no constructor for the class and no-argument constructor for the class then it is known as default constructor. This constructor is created by default by the java class. If the programmer defines other constructors then this is not created by default by Java class.

92. Explain the term deserialization in Java?

The stream data created through serialization is converted in to object and this process is called deserialization.

93. Explain the process to run the JAR file in Java?

Main class entry is required to run a jar file in the jar manifest file. The java command executes the class and the entry point is the main class.

94. What is the purpose of an instance of a keyword?

An instance of a keyword is used to check the objects. To know about which class the object belongs to the instance of keyword is used. Join the Java Course to become an expert in java programming.

95. Which method is used to test whether a language is passing by reference or pass by value?

The swap method is used to check whether a language is passed by reference or pass by value.

96. Where java compiler is stored in JAVA?

Java compiler is not stored in JRE or JVM but it is stored in JDK. Join the Advanced Java Training in Chennai at TIC Academy to complete the software projects within the given time and increase the productivity of the business.

97. What are the benefits of the collections frameworks?

The effort towards the development is reduced, code quality is enhanced as the collections framework classes are already tested, the maintenance cost is reduced, and reusability are some of the benefits of the collections framework. Collections are used in every programming language with the usage of generics and concurrent collection classes.

For more Java Interview Questions and Answers

Job Title: Java Developer

Responsibility: Take care of developing high performance, enterprise level and highly scalable applications, write good efficient code with designs which match the requirement.

Job Description: Need graduates with BS or MS qualification in computer science, He or she should have 4 to 8 years of experience, experience in Java EE platforms, knowledge of databases, knowledge of framework, certification in Java from sun.

Company Name: BSRI Solutions Private Limited

Location: Chennai

Contact details: [email protected]

Date of interview: After sending the bio-data the company contact person will send the interview call letter to the concern selected students.

Job title: Junior java developer

Responsibility: Understand the core java concepts like collections, algorithm, data structure, experience in handling the multi-threading, understand the oops concept, Experience in frameworks and RDBMS.

Job Description: Graduate or post graduate with one month notice period, preferable experience is 1 to 6 years.

Company Name: Xoriant Solutions PVT ltd

Location: Chennai

Contact details: 8830735904

Date of interview: Send the resume to [email protected] and get the interview call.

Job Title: Java Programmer

Responsibility: He or she should have experience in web services, handle JIRA tool and take care of the maven deployment. 1 to 6 years of experience is desirable.

Job Description: Experience in web-apps, knowledge in Jsp, servlets, Data base knowledge in Oracle, JavaScript, bootstrap, and frameworks knowledge like spring and hibernate.

Company Name: Intel Serve IT Solutions

Location: Chennai

Contact Details: Send your bio-data to [email protected]

Date of Interview: Send the bio-data with the information about the notice period to the aforesaid email id. The contact person will intimate the interview schedule.

Job Title: Java Developer

Responsibility: Immediate joiners with 30 days’ notice period, 3 to 5 years of experience with programming, maintenance, and design and software development.

Job Description: Knowledge in Java, Spring-boot, hibernate, Rest APi, Bootstrap, angular, and node js.

Company Name: Cintana Technologies Private limited.

Location: Chennai

Contact Details: [email protected]

Date of Interview: send the biodata to [email protected] or 9600007530 to schedule the interview.

Job Title: ExcelaCom Technologies Pvt Ltd

Responsibility: This role is for the R and D team and it requires 1 to 3 years of experience in the field.

Job Description: Experience with java and J2EE, advance java knowledge like struts, spring and hibernate, good programming and communication skills to handle the client requirements.

Company Name: Excelacom Technologies PVT Ltd

Location: Chennai {Navalur}

Contact Details:  5/D-5, SIPCOT IT Park, Navalur Post, Siruseri, Chennai- 603103 KANCHIPURAM, Tamil Nadu, India 603103

Date of Interview: Call 91-44-30683000 to know about the interview details.

Job Title: Full stack Java Developer

Responsibility: RR Donnelley is a leading provider in the market and located in multiple locations like North America, Europe, India, Srilanka and Philippines. The desired candidate should handle the client requirement and the front end development.

Job Description: This is full time and permanent job for the job seekers. The desired candidate should have knowledge in Core java, JavaScript, Angular JS, HTML, and CSS. Experience in handling Jira, An gular 2, typescript, Mango DB, Oracle, Agile methodology, spring boot and RESTful design is required. 3 to 8 years of experience is needed.

Company Name: RR Donnelley India Outsource Private Limited

Location: Chennai

Contact Details: Jones Vasanth-7200017462

Date of Interview: Call the contact number and schedule the interview after a telephonic discussion.

Job Title: Java Developers

Responsibility: This job opening is for candidate with 3 to 6 years of experience, He or she should have the java knowledge, designing skills and communication skills to develop the application and maintain the application.

Job Description: Knowledge in Core java, hibernate, webservices, JSP servlets, and collections.

Company Name: Virtusa Consulting Services Pvt Ltd

Location: 34, IT Highway, Navallur, Chennai – 600103

Contact Details: Call the number 91-44-000000000 to speak to Aravind and schedule the interview.

Job Title: Java Programmer

Responsibility: Develop coding for the application and take care of maintenance.

Job Description: Any graduate, 2017 and 2018 passed out, the joining process is direct for the freshers, the desired experience is 0 to 1 year.

Company Name: Tarv Technologies

Location: Chennai

Contact Details: No.1, 1st floor, Balaji Nagar, 1st Street, Ekkattuthangal, Ch-32

Land Mark: Near Saravana Bhavan Hotel

Date of Interview: Direct walk in from 21 January to 23rd January.

Job Title: Java Developer

Responsibility: Communicate with the clients and develop the coding for the different needs of the business.

Job Description:  The candidate should possess basic knowledge in java, JSP, Servlets and SQL, this is fresher requirement and only for the male candidates, and 3 years of service agreement is essential.

Company Name: Inspiri Solutions Limited

Location: Chennai

Contact Details: No:54, Murugesa Naicker complex, Greams road, Chennai-600006

Date of Interview: 21st January 10 AM to 3 PM

Job Title: Java Developer

Responsibility: Program and design the coding to match the different requirements from the clients.

Job Description: 4 to 9 years of experience is required, immediate joiners with 15 days of the notice period are essential.

Company Name: ILABZ TECHNOLOGY LLP

Location: Hyderabad, Chennai and Bengaluru

Contact Details: Share the resumes to [email protected]

Date of Interview: After screening the interview the contact person will send the details about the date of the interview.

Join the Best Java Training Institute in Chennai, TIC Academy to become successful in the career path with the genuine tips from the group of experts. We have good rapport with the community of experts and learners in the respective technology as we train the students for different requirements.

Job Title: Developer or Team Leader

Responsibility: Check the code reviews, prepare the HLD, LLD and other technical documents, analyze the performance, give solution to the problems, maintain the quality process, check the deliverables, 3 years’ experience in Angular JS and React JS, 6 years of experience in Java, spring, hibernate, java script, and MySQL. And knowledge to use JIRA tool for bug tracking.

Job Description: Proven record in managing the teams, Leadership qualities to manage the team, excellent communication skills, strong interpersonal skills, Experience working in Agile, Experience in Architecting the Solution (Java) and using Java effectively, check Code Review, Prepare HLD, LLD and Technical Specification Documents as a team leader, analyze the performance of the team members, Adhere to Quality Process for the relevant deliverables, Should be able to get hands-on in the job, when required 6 years of experience in Java, experience in the frame works like Spring and Hibernate, JavaScript, MySQL, 3 years of minimum in Anglar.js and react JS, Knowledge of JIRA. 5 to 10 years of experience in Java.

Company Name: Sensiple Software Solutions Private Ltd

Location: Chennai (Navallur)

Contact Details: E-mail the resume to [email protected] or call the number 044-47419078

Date of Interview: After the screening the date will be intimated

Job Title: Java Developer

Responsibility: Take care of the application programming and maintenance of the application.

Job Description: Knowledge in core Java, J2EE, JDBC, and knowledge in frameworks like spring and hibernate. 0 to 5 years of experience is required.

Company Name: Auto Systems PVT Ltd.

Location: Chennai, Hyderabad, Kolkata

Contact Details: Call Sandhya 7378987634 and use the link to apply online to this job with http://autosystem.co.in/

Date of Interview: 20th December to 19th January, Walk in time is 11AM

Job Title: Java Developer

Responsibility: Take care of the programming and handle challenges with intense knowledge.

Job Description: Notice period of 15 to 30 days is allowed. Candidate with one to five years of experience in Java is preferred. Knowledge of core java, knowledge in oops concepts, experience in frameworks like spring, hibernate, experience in JDBC, experience in JSP, servlets, Good exposure to HTML, CSS, Jquery, data structures and database knowledge of MySQL operating systems knowledge from Windows and Linux is required.

Company Name: Quintessence Business Solutions and Services

Location: Chennai

Contact Details: Send your resume to the e-mail id [email protected]

Date of Interview: 19th December to 29th December and the time is 11 AM.

Java is a well-known programming language in the field of Information Technology is Java Training in Chennai, which was designed for the constant flow of code on any machine. This was considered a treasure due to its wide usage on any platform or architecture. Java Training in Chennai at TIC ACADEMY provides a solid platform to launch your career in Java.

Java is one of the popular programming languages that are class-based and object-oriented. Java is owned by Oracle company and its functioning in 3 billion devices around the world. Java will be safe for many years with high demand for Java developers in top MNC. Java is developed by James Gosling at Sun Microsystems and was launched in 1995. It is now acquired by Oracle Corporation. This language has similar syntax from C and C++.

Here we discuss the features of Java programming in brief as listed below

1, Java is a platform-independent programming language

2, Java is an Object-oriented language

3, Java is very fast to use

4, Java provides features for security

5, Java is a huge standard library

The latest edition of Java programming is Java SE 8. Many configurations built to suit different platforms. The new version J2 is called Java SE, Java EE and Java ME accordingly.

Here we require a Pentium 200 MHz computer with RAM of 64 MB. The following software required for these is Windows XP or Win 7 or Win 8 or Linux 7.1, Java JDK 8, Microsoft Notepad or any text editor. The basic concepts followed in Java are Inheritance, Polymorphism, Abstraction, Classes, Objects, Instance, Method.

James Gosling introduced Java in June 1991which was known as Oak named after an oak tree outside Gosling’s office and got its name changed as of Java over a period. Thus, the journey of Oak becoming to be known as Java ends here.

Java Training in velachery was not an open-source initially, it was under the influence of GNU General Public License, and Sun released the open-source version of Java in November 2006. Also, by May 2007 it was completely coded free language.

The evolution of Java till date is listed below:

• JDK Beta (1995)
• JDK 1.0 (Jan 1996)
• JDK 1.1 (Feb 1997)
• J2SE 1.2 (Dec 1998)
• J2SE 1.3 ( May 2000)
• J2SE 1.4 (Feb 2002)
• J2SE 5.0(Sep 2004)
• Java SE 6 (Dec 2006)
• Java SE 7(July 2011)
• Java SE 8 (Mar 2014)
• Java SE 9(Sep 2017)
• Java SE 10(Mar 2018)
• Java SE 11(Sep 2018)
• Java SE 12 (Mar 2019)

Tomcat is considered the desirable application server for the open-source programming language-Java. For the usage of Java in any web browser, it is necessary to have a Java plug-in.

Java has unlocked its doors for interaction with other companies to extend the Java community. With the back-to-back, the release of versions in Java its expectation for lots of changes shortly. Thus, Java Training is very popular in the market to become successful as a programmer. TIC Acdemy is ranked as the best Java Training Institute in Chennai.

Java Training in Chennai- Outline

There are various training for plenty of programming languages present in the market but Java remains at the top of the list. Sun Microsystems developed it in the year 1995. James Gosling is the one behind its innovation. The recent update released by them for Java is Java SE 11(18.9 LTS) launched in September 2018.

Pattern with Predicate Utility Methods, Optional.isEmpty, Epsilon Garbage Collector are some of the noted features of Java SE 11. Soon after the launch of Java, its popularity made openings for multiple configurations for different platforms like J2EE, J2ME and the list continues.

Its preference amidst developers keeps on increasing as program once written in

Java Training in Chennai can be executed irrespective of the platform it is implemented.

How is Java related to C and C++

The syntax of Java Course is derived from C and the object model is derived from C++. The programmers who are well versed with C/C++ language will be easily learning Java. Moreover, Java developers do not create a new thing but modify the already existing. As many similarities are prevailing between Java and C++, Java is known as the Internet version of C++. Java was not created for the replacement of C++ whereas its creation is to support for getting solution issues, which arise in C++. Hence, Java Course in Chennai is preferred over others.

How is Java related to C#

C# language was developed by Microsoft, which has similar features with Java. Both of them are using the general style syntax. TIC is considered as the best Java Training Institute in Chennai.

Contribution of Java to the Internet

Applet

An Applet is one of the contributions of Java, which reframed the networked program across the world. It is designed for transmission over the Internet and executed by the web browser, which is compatible with Java. If the user clicks on anything, which consists of Applet, then it will download the applet automatically.

Applet runs within a web browser, which works at the client-side. It is embedded in an HTML page with the use of OBJECT or APPLET tag.

Points to remember:

• Every applet is a sub-classes of java.applet.Applet class.
• They have never been a stand-alone program as they run inside an applet viewer or a web browser. Moreover, JDK enables a standard viewing tool for an applet namely applet viewer.
• For an applet window, the output is not done using System.out.println() whereas done using AWT methodologies.
• The execution of the applet at the main() method is not used in the beginning.
• The various methods are:
• init(): This is the first method that is called for the initialization of variables. Moreover, it is called only once during run time.
• start(): It is the next step after init() and also called to restart an applet once it is stopped.
• paint(): The paint( ) is called every time AWT-based output of an applet needs to be redrawn, which can occur for many reasons. For instance, the window where the applet is running may be overwritten by another window. Or else even the applet window might be minimized and later on restored.
• In another instance, it is also called when the execution of the applet begins.
• stop(): This method is called when an HTML document having is left by the web browser. When stop( )is called, the applet is under execution.
• destroy(): This is called when the environment is the key factor in determining which applet is needed to be removed completely from memory.

Features of Applets over HTML

• It displays dynamic web pages of any web application.
• It plays sound files.
• Plays animations
• Displays various documents

It made numerous changes in the world of the Internet as the objects were able to progress freely. The 2 categories of information that are transmitted between the server and client namely passive and dynamic information.

Let us get into the topic of what makes Java more prominent

Complex-free: Java was designed for the developers to write programs with ease. It is considered easier than C++ as there is an automatic memory allocated.

Multi-threaded: The capacity of a program to perform many tasks simultaneously within the program.

Object-Oriented: Allows the user in the creation of modular programs along with reusable code.

Distributed: Designed to make allocated computing simple along with the networking capability.

Platform-Independent: Moving it from one system to another can be done with much ease.

Secure: The Java language is highly secured when compared with other programming languages.

Robust: It helps in eliminating error due to the presence of time error check along with runtime check.

StackAllocation: This helps the user to store data with ease.

High Performance: Java set up high performance due to the presence of just-in-time compilers.

Thus, enroll yourself in Java Training at TIC Academy for a blissful future.

History of Java

The project Java was initiated in the year 1991 by James Gosling, which was originally called “Oak” named after the Oaktree, which stood in the entrance of James’s office. Then it was renamed as Green and after a long time, it got the name ‘Java’. Its public implementation happened in the year of 1995 by Sun Microsoft.

After this, it was made open source in the year 2006under the terms of GPL. Finally, on May 8th of 2007, the process of making it code free was accomplished. Java Classes in Chennai is of great opportunity for IT professionals.

Tools in need

There are certain specifications to be fulfilled for running Java in your system. As Java Training is fetching more students it is indeed to have the specific hardware and software to work on Java. They are specified below:

• Pentium 200-MHzComputerwith64 MB of RAM
• Linux 7.1 or Windows xp/7/8 operating system
• Java JDK 8
• Microsoft Notepad

Java-Syntax

A program in Java is a cluster of an object, which communicates by calling upon each other’s method. Let us concentrate on the various components present in Java syntax:

Class- It is the blueprint, which describes the state of the object supported by it.

Object- They have various states along with different behaviors.

Methods- It is always been a behavior.

Instance variables- Every object has a unique set of it.

Java Identifiers

Every component present in Java requires names. It may be used for classes, methods, and variables that are known as identifiers. There are certain basic things to be remembered:

• The identifier should begin with the alphabet, underscore or currency character.
• They are case sensitive.
• The rest of the characters should be a combination of characters.
• The keyword should not be used as an identifier.

Java Modifiers

It is indeed necessary to modify methods, class and other components. The modifiers are classified into two:

non-access modifier: abstract, final

Access modifier: public, default

Java Variables

There are various Java variables:

• Local Variables
• Instance Variables (Non-static Variables)
• Class Variables (Static Variables)

Java Enums

Java 5.0 consists of Enums, which restricts variables to have a single predefined value form the given list. Enums are used for the reduction of bugs in the code.

Java Keywords

There are certain reserved words that cannot be used as variable or constant namely: abstract, assert, Boolean,break, byte, case, catch, char, class,continue,const, default, else, double, float, final, do, enum, extends, if, for, implements, goto, int, import, interface, instance, native, long, package, new, public, short, private, return,strictfp, synchronized, throw, switch, static, transient, volatile, void, try, throws.

Comments in Java

It supports both single and multi-line comments, which is similar to C and C++.

Inheritance

The specialty of Java classes can be derived from classes.

Interfaces

It is the arrangement between objects for the method to communicate. It plays a crucial role in inheritance.

Java – objects & Classes

Java is an object-oriented language which includes:

• Inheritance
• Polymorphism
• Abstraction
• Encapsulation
• Objects
• Instance
• Class
• Object
• Classes present in Java

There are 3 classes present in Java:

A class can contain any of the following variable types.

Local variables: These variables are defined inside methods, constructors or blocks.

Instance variables: variables are defined within a class and outside any method.

Class variables: These are declared within a class, outside the method, with the static keyword.

How to Use Singleton Class?

Its work is to control object creation, which in turn limits the number of objects to one. As there is a singleton instance, its occurrence will be restricted to one per class. Join our Java Classes in Chennai and get more knowledge in it.

How to Create an Object

A class in Java administers the blueprints for any objects. The steps involved in the creation of an object are:

• Declaration: A variable is declared with a variable name and an object type.
• Instantiation: The ‘new’ keyword is used for the creation of an object.
• Initialization: The ‘new’ keyword is pursued by a call to a constructor.

Operators

The various operators available in Java are:

Bitwise Operators– &(bitwise and), ~ (bitwise complement), | (bitwise or), >> (right shift), << (left shift), ^ (bitwise XOR), >>> (zero fill right shift).

Arithmetic Operators– + (Addition), * (Multiplication), % (Modulus), – (Subtraction), / (Division), ++ (Increment)

Assignment Operators – =, *=, +=, %=, |=

Logical Operators – || (logical or), && (logical and),! (logical not)

Relational Operators– == (equal to), < (less than), != (not equal to), <= (less than or equal to)

Misc Operators-Conditional Operator

Application

There are over 3 billion devices, which run on Java script. Thus, joining Java Training in Chennai at TIC Academy will be of great help for you to enter the IT sector. Few among them are listed below:

• Web based Applications such as amazon.in, etc.
• Mobile
• Enterprise based Applications like banking applications.
• Robotics
• Desktop-based applications like media player, acrobat reader, etc.
• Embedded System
• Smart Card
• Games

Types Of Java Applications

There are four types of applications, which can be generated with the use of Java programming:

1) Web Application

An application that can be executed on the server-side along with the creation of the dynamic page is known as a web application. Servlet, Struts, JSF, Spring, etc. are some of the technologies which are used in the creation of web applications.

2) Standalone Application

Standalone applications are also known as window-based or desktop applications are traditional software, which is indeed necessary to be installed on every machine. There are various examples for standalone applications such as antivirus, Media player, etc. AWT and Swing are deployed in the creation of Java.

3) Enterprise Application

An application that is assigned in nature, such as banking applications, etc. is called enterprise application. It has many benefits of load balancing, high-level security, and clustering. Enterprise Java Beans is deployed for the creation of enterprise applications.

4) Mobile Application

An application that is created for mobile devices is known as a mobile application. These days, Java ME and Android are used for the creation of various mobile applications.

Java Platforms

The students with a considerable amount of knowledge in Java Training have good openings in the market. Java platforms are classified into:

1) Java Standard Edition

Java SE is a Java programming platform that consists of Java programming APIs like java.net java.lang, java.io, java.math, java.util, java.sql, etc. It has basic topics such as OOPs, Reflection, Regex, Exception, String, Inner classes, I/O Stream, Networking, AWT, Multithreading, Swing, Collection, etc.

2) Java Enterprise Edition

J2EE is an enterprise platform that is primarily used for the development of enterprise and web applications. It is erected on top of the Java SE platform. It also has topics such as Servlet, Web Services, EJB, JSP, JPA, etc.

3) Java Micro Edition

JME is a micro platform that is used to develop various mobile applications.

4) JavaFX

It is used to develop an affluent internet application, which makes use of light-weight user interface API.

Difference Between JDK, JRE, And JVM

JVM

Java Virtual Machine is an abstract machine and is called a virtual machine as its existence is not physical. Moreover, it is a blueprint, which provides a runtime environment for the execution of Java bytecode. Also, the execution of programs written in other languages is possible.

All three JVM, JDK, and JRE are platform reliant due to the composition of all the unique operating systems. JVMs are availability us not constrained to any one hardware or software. For further information, join TIC Academy, the best Java Training Institute in Chennai.

The tasks performed by JVM are:

• Supply’s runtime environment
• Loading of code
• Verifying the code
• Execution of code

What Is JVM

JVM is a specification in which the working of Java Virtual Machine is specified. Moreover, the implementation provider is not dependent on the choice of the algorithm whose implementation is provided by Oracle. TIC Academy is among the top Java Coaching Centers in Chennai.

JVM describes the following:

• Register set
• Fatal error reporting
• Memory area
• Class file format
• Garbage-collected heap
• Java Variables

A variable is a container that possesses the value when the java program has been executed. A variable is accredited with a datatype.

Variable is a name given for memory location, which is classified into three types: instance, local, and static. Join our Core Java Training in OMR and get the opportunity to enter the It sector.

There are two types of data types in Java: primitive and non-primitive.

Variable

It is the fundamental unit of storage in any program.

The value that is stored in a variable can be altered during the process of the program execution.

A variable is just a name given to a memory location.

In Java, every variable must be declared before bringing into use.

Variable has always been a combination of vary + able.

Data Types in Java Training in Chennai

Data types define the different sizes, values as well, which can be stored in the variable. It is classified into two data types in Java:

Primitive data types: Primitive data types consist of boolean, byte, double, short, int, char, long and float.

Non-primitive data types: This include Classes, Interfaces, along with Arrays.

Java Primitive Data Types

In Java language, basic data types are the building blocks of data manipulation. The following are the fundamental data types that are available in the Java language. Become smart by joining our Java Training in Adyar.

They are classified into 8 types of primitive data types:

• byte data type
• char data type
• short data type
• Boolean data type
• float data type
• int data type
• long data type
• double data type
• Boolean Data Type

The Boolean data type is used for the storage of only two possible values either true or false. This data type is used for tracking of true/false conditions in simple flags.

Byte Data Type

The byte data type also belongs to primitive data type, which has an 8-bit signed two’s complement integers. The value-range of byte datatype lies between -128 to 127 with the minimum value -128 and the maximum value 127 with a default value is 0.

This is used to save memory in large arrays in which the memory savings is indeed necessary that saves space as a byte is 4 times smaller than an integer. This can be used for the replacement of the “int” data type.

Short Data Type

It is a 16-bit signed two’s complement integer who’s value-range lies amid -32,768 to 32,767 considering minimum value as -32,768 and the maximum value is 32,767. The default value in the short data type is also 0.

It is similar to the byte data type to memory saving. Moreover, it is 2 times smaller when compared with an integer.

Int Data Type

This data type is a 32-bit signed two’s complement integer with a value ranging between – 2,147,483,648 to 2,147,483,647. The minimum value is considered to be – 2,147,483,648 and maximum value as 2,147,483,647 with a default value as 0.

This is broadly used as the default data type for the integral values except if there is no problem for the memory.

Long Data Type

This is a 64-bit two’s complement integer and consist of value-ranging between -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807. Long datatype has minimum value as – 9,223,372,036,854,775,808 and with the maximum value as 9,223,372,036,854,775,807.

The default value is considered to be 0. This data type is deployed when there is a need for a range of values that are provided more than by int.

Float Data Type

This data type is a single-precision 32-bit floating point with a value range that is considered unlimited. It is favored to the usage of a float instead of using double if there is a need to save memory in large arrays of floating-point numbers. This data type should never be used for precise values such as currency with a default value as 0.0F.

Double Data Type

This is a double-precision 64-bit IEEE 754 floating-point with an unlimited range of value. This data type is normally used for decimal values similar to float. The double data type should never be used for precise values, like currency with a default value of 0.0d.

Java If-else Statement

Java if statement is deployed to test the condition and checks the boolean condition of true or false.

The types of if statement in java are:

• if statement
• if-else-if ladder
• if-else statement
• nested if statement

Java if Statement

It runs the if block if the condition is true.

Syntax:

if(condition){

//code to be executed

}

Java If-Else Statement

The Java if-else statement executes the if block, when the condition is true otherwise else block is executed.

Syntax:

if(condition){

//code if the condition is true

}else{

//code if the condition is false

}

Java Nested If Statement

The nested if statement serves the if block within another if block. In this, the inner if block condition runs only when the outer if block condition is true.

Java Switch Statement

The Java switch statement executes only one statement from multiple conditions. The switch statement works with long, byte, short, int, enum types, String. In other words, the switch statement is deployed for testing the equality of variables against multiple values.

Loops Available In Java

In the various programming languages available, loops are used to execute a set of instructions repeatedly when some of the conditions are true. They are classified into three types:

• while loop
• for loop
• do-while loop

Java For Loop

In Java, for loop is used for the iteration of a part of the program many times. If the number of iterations is steady, it is recommended for the usage of the loop.

They are:

• Labeled For Loop
• Simple For Loop
• Enhanced For Loop

Java Simple For Loop

A simple loop is the same as C or C++. Initialization of variable, condition check, and increment or decrement value can be done. It has four parts:

Initialization: It is the initial condition that is executed when the loop begins. Here, initialization of we can initialize the variable, or we can use an already initialized variable. It is an optional condition.

Condition: It is the next condition that is executed every time to test the condition of any loop and continues the execution process until the condition is false. It must return a boolean value either true or false.

Statement: The statement of the loop is executed each time until the second condition is false.

Increment/Decrement: The variable value can be incremented or decremented, which is an optional condition.

Java For-Each Loop

The for-each loop is used to traverse collections in java. And is easier to implement than simple for a loop as there is no need to increment the value along with the use of subscript notation. It works on elements basis and not on the index. We get you trained in Java Course for a bright future.

Syntax:

for(Type var:array){

//code to be executed

}

Java Labeled For Loop

We can bear the name of each Java Training in Tambaram for a loop. We can make use of labels before the for loop. It is indeed useful if we have nested for loop, with its help we can break/continue specifically for a loop.

Syntax:

labelname:

for(initialization;condition;incr/decr){

//code to be executed

}

Java Infinitive For Loop

If you use two semicolons ;; in the for loop, it will be infinite for loop.

Syntax:

for(;;){

//code to be executed

}

Java While Loop

The Java while loop is used to iterate a part of the program several times. If the number of iterations is not fixed, it is recommended to use a while loop.

Syntax:

while(condition){

//code to be executed

}

Java Infinite While Loop

If you pass true in the while loop, it will be infinite while loop.

Syntax:

while(true){

//code to be executed

}

Java Do-While Loop

The Java do-while loop is used to iterate a part of the program several times. If the number of iterations is not fixed and you must have to execute the loop at least once, it is recommended to use the do-while loop.

The Java do-while loop is run at least once because the condition is checked after the loop body.

Syntax:

do{

//code to be executed

}while(condition);

Java Infinitive Do-While Loop

If you pass true in \ do-while loop, it will be an infinitive do-while loop.

Syntax:

do{

//code to be executed

}while(true);

Java Break Statement

When a break statement is encountered within a loop, the loop is immediately terminated and program control resumes at the next statement following the loop.

The Java break is used to break the loop or the switch statement. It breaks the current flow of the program at a specified condition. In the case of the inner loop, it breaks the inner loop alone.

We can use Java break statement in all types of loops such as for loop, while loop and do-while loop. We will give training with the help of real-time examples in TIC Academy, the best Java Training in Chennai.

Syntax:

jump-statement;

break;

Continue Statement

The continue statement is used in a loop control structure when you need to jump to the next iteration of the loop immediately. It can be used with for loop or while loop.

The Java continue statement is used to continue the loop. It continues the current flow of the program and skips the remaining code at a specified condition. In the case of the inner loop, it continues the inner loop.

We can use Java continue statement in all the types of loops like for loop, while loop and do-while loop. For any further knowledge in Java enroll yourself in our J2EE Training in Chennai.

Syntax:

jump-statement;

continue;

Java Operators

It is used to operate on variables and values. These two terms are included operand and operator.

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Example :

int x=100 + 50

* Values are the operand

*The operation performed between two operands is defined as an operator. TIC Academy is the no.1 JAVA Course in Chennai

Multidimensional Arrays

If an array contains one or more arrays is called a multidimensional array. To create a two-dimensional array add each array to itself of curly braces.

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Example

int[ ][ ] x={{1,2,3},{5,6,7}};

X is an array with two arrays with its elements

To access the elements of the X array, set the two indexes:

One for array and one for the elements inside that array.

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Example

int [ ][ ] x={{1,2,3},{5,6,7}};

int y=x[1][2];

System.out.println(y);

RESULT::7

We can also use for loop inside the for loop to access the elements of a two-dimensional.TIC Academy core Java training in Chennai

Example

int[ ][ ] x={{1,2,3},{5,6,7}};

for(int i=0;i<x.length;++i)

{for(int j=0;j<x[i].lemgth;++j)

{system.out.println(x[i][j]);

}}

Modifier Type

Modifiers are the keywords that can be added to those definitions, which are intended to be changed for their meanings. Java is a language that has a wide range of modifiers, inclusive of the following –

• Java Access modifiers
• Non Access Modifiers

For making use of a modifier, keyword is included in the definition of a class, variable, or method. Java Training in Chennai will be of great scope for you.

Access Control Modifiers

Java has several access modifiers to set access levels for various classes, variables, methods, and constructors. There are four access levels-

• Those are visible to package, the default. No modifiers are required.
• Visible to the class alone (private).
• Visible to package and all the subclasses (protected).
• Visible to the entire world (public).

Character Class

We come across many situations where the need for objects is done instead of primitive data types. To achieve this, Java gives wrapper class Character for the primitive data type char.

The Character class normally wraps the value of all the primitive type char into an object. Thus, an object of type Character can consist of a single field whose type is char. Java Course in Chennai is the best course for professionals who are looking for the domain change.

All the fields, constructors, and methods of the class Character that are specified by the Unicode Data file and is a part of the Unicode Character Database, which is maintained by the Unicode Consortium.

Java in generic makes use of the UTF-16 encoding method to represent the various char arrays in the String or String Buffer.

Escape Sequences

When any character is preceded by a backslash it is referred to as an escape sequence and has specific meaning to the compiler. TIC Academy has been regarded as the best Java training institute in Chennai.

String Class

With the help of various methods, it is simple to perform various operations like trimming, replacing, converting, comparing, concatenating on the string.

It is a powerful concept as everything is considered as a string, while the submission can be done in window, web-based or mobile-based applications.

Creating Strings

Whenever there is a presence of string literal in the code, the compiler enables in the creation of a String object with its value in this case for instance, “Hello world!’.

It is possible to create String objects by deploying any new keyword along with a constructor. The String class consists of 11 constructors that enable the user to provide the initial value for the string with the use of different sources like an array of characters.

String Length

Methods used to obtain information regarding an object is referred to as the accessor method, which can be used with strings is the length() method that returns the number of characters present in the string object.

Date and Time

Java is a proficient language that provides the Date class accessible in java.util package and this encapsulates the current date and time.

Getting Current Date and Time

This is a simple method to get the current date and time. You can make use of simple Date object with the use of toString() method to print the current date and time

Sleeping for a While

The user can sleep for any duration of time from one millisecond to the lifetime of the computer, which is an added advantage.

GregorianCalendar Class

This is a definite implementation of a Calendar class, which implements a normal Gregorian calendar.

The getInstance( ) method of this Calendar returns a GregorianCalendar boot up with the current date along with time in default local and time zone. It defines both AD and BC fields, which represent two eras defined by the Gregorian calendar.

Regular Expression

Regular Expression is also known as Java Regex is an API used to define a pattern for initiating the search or manipulation of strings. This is a special sequence of characters, which aids the user to match other strings or sets of strings with the usage of a specialized syntax held in any pattern.

Its usage is widely done for defining the constraint on strings like password and email validation. After gaining knowledge in Java regex, it will be simple for you to test regular expressions by deploying Java Regex Tester Tool.

A java.util.regex package is provided by Java to match the pattern with regular expressions, which is similar to Pearl programming language. This package consists of three classes:

Pattern Class − This provides no public constructors. To create a pattern, the user must invoke its public static compile() methods. It is a compiled version of a regular expression.

Matcher Class − It is the engine that interprets the pattern and also performs public constructors. The user can obtain a Matcher object by just invoking the matcher() method on a Pattern object.

This implements the MatchResult interface. The different methods available in the Matcher Class are:

• Index methods
• Study methods
• Replacement methods
• PatternSyntaxException − This is an unchecked exception, which indicates a syntax error in a regular expression pattern.

Capturing Groups

Capturing groups are a way to treat multiple characters as a single unit. They are created by placing the characters to be grouped inside a set of parentheses. For example, the regular expression (dog) creates a single group containing the letters “d”, “o”, and “g”.

Java – Methods

It is a collection of statements, which are grouped to operate. When the user calls the System.out.println()method, the system executes several statements for displaying a message on the console.

A method is nothing but a block of code that only runs when it is called by the user.

The user can pass data, called parameters, into a method.

Methods are deployed to perform specific actions, called as functions.

Creating Method

A method is needed to be declared within a class. Moreover, it is defined with the name of the method, being followed by parentheses ().

Method Calling

For the deployment of a method, it is indeed necessary to be called. This can be done in two different ways: method returns a value or returning nothing.

To call a method in Java, the user needs to write the method’s name succeeded by two parentheses () and a semicolon;

The process of method calls can be done with ease. When a program invokes any method, the control of the program gets transferred to the called method, which in turn returns control to the caller in two conditions, when −

• it reaches the method ending closing brace.
• the return statement is executed.

Method Parameters

The information can be passed to functions as a parameter that is specified after the method name, within the parentheses. The user can also add as many parameters as per the necessity by just separating them with a comma.

The Void keyword

The void keyword enables the user to create methods that do not return a value.

Method Overloading

When a class consists of two or more methods with the same name but different parameters, it is referred to as method overloading, which is different from overriding. In the method of overriding, a method has the same method name, type, number of parameters.

Passing Parameters by Value

While working concealed by the calling process, an argument is to be passed. And this should be in the same order as their corresponding parameters present in the method specification. Parameters can be passed either by value or reference.

Passing the parameters by Value stands for calling a method with a parameter.

Using Command-Line Argument

At times the user may determine to pass few information into a program when during the execution. This is done just by passing command-line arguments to main( ).

A command-line argument is a piece of information that directly precedes the program’s name on the command line when it is run. To access the command-line arguments within a Java program can be done with ease.

The finalize () Method

It is likely to define a method that is to be called before an object’s final destruction by the garbage collector. And this method is referred to as finalize( ), which can be used to ensure that an object terminates perfectly.

To add a finalizer to any class, the user simply defines the finalize( ) method. Within the finalize( ) method, the user will specify actions that are to be performed before the destruction of an object.

Files and I/O

The java.io package contains nearly every class you might ever need to perform input and output (I/O) in Java. All these streams represent an input source and an output destination. The stream in the java.io package supports many data such as primitives, objects, localized characters, etc.

Java input and output process every input and generates the output based on the given input. Java makes use of streams to perform the input and output operation. Package java.io consists of the classes that are needed for the input and output operation. A stream is a series of data. Three streams are created automatically in Java which is as follows:

• in: This stands for the standard input stream and gives the data to the user’s program. Generally, a keyboard is used as a standard input stream.
• out: It stands for the standard output stream to output the data generated by the user’s program and the generic monitor is used for the standard output stream.
• err: It stands for the standard error stream and is used to get output the error data generated by the user’s program.

Stream

A stream can be defined as a sequence of data. There are two kinds of Streams −

• InPutStream − The InputStream is used to read data from a source.
• OutPutStream − The OutputStream is used for writing data to a destination.

Java provides strong but flexible support for I/O related to files and networks but this tutorial covers very basic functionality related to streams and I/O. We will see the most commonly used examples one by one −

Byte Streams

Java byte streams are used to perform input and output of 8-bit bytes. Though there are many classes related to byte streams but the most frequently used classes are, FileInputStream and FileOutputStream.

Character Streams

Java Byte streams are used to perform input and output of 8-bit bytes, whereas Java Character streams are used to perform input and output for 16-bit Unicode. Though there are many classes related to character streams but the most frequently used classes are, FileReader and FileWriter. Though internally FileReader uses FileInputStream and FileWriter uses FileOutputStream but here the major difference is that FileReader reads two bytes at a time and FileWriter writes two bytes at a time.

Standard Streams

All the programming languages provide support for standard I/O where the user’s program can take input from a keyboard and then produce an output on the computer screen. If you are aware of C or C++ programming languages, then you must be aware of three standard devices STDIN, STDOUT and STDERR. Similarly, Java provides the following three standard streams −

• Standard Input − This is used to feed the data to the user’s program and usually a keyboard is used as a standard input stream and represented as in.
• Standard Output − This is used to output the data produced by the user’s program and usually a computer screen is used for standard output stream and represented as out.
• Standard Error − This is used to output the error data produced by the user’s program and usually a computer screen is used for standard error stream and represented as err.

Reading And Writing Files

As described earlier, a stream can be defined as a sequence of data. The InputStream is used to read data from a source and the OutputStream is used for writing data to a destination.

Tip for becoming a good Java programmer

Java is considered as the basic programming language for many applications around the world. Also, it is the easiest language that can be learned to enter the IT sector. When object-oriented programming is considered the first thing that strikes our mind is Java that makes the way for cross-platform programming along with the application development.

Java Training in Tnagar at TIC Academy will help aspirants to make a successful career as a Java Developer. Its popularity is due to the effortless path to perform multiple tasks related to programming. Java has been of complete utilization by the experts in the field. And for becoming an efficient developer in Java certain tips will be useful for you.

Strong foundation in the basics

Whatever may be the course you are learning having a thorough knowledge of basics is considered to be very important. As there is no point of getting a doubt in sentence formation when you are not thorough of the alphabet. Its human nature to learn many things and forget the basics. Thus, it leads to the stumbling of developers during the creation of critical programs in Java programming as well.

Execute the gained knowledge

It is usual for children watching TV or listening to music while studying these days, which leads to a shorter span of memory. Similarly, developers who just learn the concepts at one go and do not execute them will experience some sort of issue during the execution of any new program. Thus, we offer hands-on experience for almost all the topics in the class.

Figure out the code and algorithm

For any language, it is indeed necessary to understand the code before its execution. Thus, start actualizing the need for every code you are using in the program right from the beginning, which in turn will build up your confidence while writing complex programs. It has been witnessed that even experts who have years of experience split the whole program into smaller portions to solve them.

Memory allocation

This point has been mentioned for the developers who are changing their domain from C or C++ to Java. As the former language doesn’t consist of this feature. For further information related to Java do enroll yourself into our Java Training in Anna Nagar.

DevOps tools knowledge

Tools knowledge will be of great use during the execution of complicated programs. Thus, get a thorough knowledge of it from the experts from the industry.

Create only useful objects

It is to be kept in mind that whatever object you create it must be useful as they are memory consumers along with the speed. As the creation of any object is incomplete until memory allocation is completed. Thus, it will be better if you cross-check the object requirements before its creation.

Interface better than Abstract class

Multiple inheritances are absent in Java make sure you remember this throughout your career as this may have set-back in your life. When compared with the Abstract class, the interface allows the user to have numerous methods to work.

The standard library added advantage

Java has blurred many languages that came into existence before it. This is due to the set of standard library which is present in abundance. These library methods make the work of the developer simpler in an organized manner. Moreover, the accomplishment of tasks is presented in a simplified manner.

Primitive classes prefer over Wrapper class

A wrapper class is of great service and primitive class is comparatively slower as they only have the value whereas the former can store information. Wrapper class consists of object value whereas primitive class won’t dish out the expected results.

Deal with Strings

Object-oriented programming categorizes string as a class that affects both the memory and speed of any system. Hence, you must be aware of the usage of string in Java. Get the in-depth knowledge in Java from experts by joining our Java Training in Velachery.

Learn Latest version of Java at TIC Academy

Even after 5 years from the launch still its usage has not been reduced due to its one-line code features such as lambdas and stream API. The launch of Java 9, 10, 11 didn’t affect much. Besides, Java 12 which was launched in March 2019 has various features to negate the shortcomings in previous versions.

JVM’s internals

If becoming an expert in Java is your aim, then JVM internals is something which is to be shed light on. If you are well versed with this, then high-performance and robustness will be very easy for you. Thus, join our Java Training in Chennai for enhancing your career.

Design patterns

It will be helpful for you if designing patterns are a known part regarding Java course. With the knowledge of design, you will be able to incorporate them into your code as per the requirement. Thus, be a step ahead of others by joining our Java Course in Chennai.

If you are interested in learning Java, then join our Java Training in Chennai at TIC Academy, the best Java Training institute in Chennai.

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