1. Introduction to JAVA


✔ MORE JAVA CHAPTERS:

1. Introduction to Java
2. Features of Java
3. Java Virtual Machine
4. D/F B/W JVM, JRE, JDK
5. Java Data Types
6. Java Programs
7. Setting Java Path
8. OOPs Concepts
9. Object & Class In Java
10. OOPs Continued
11. Encapsulation & Polymorphism
12. Method Overloading
13. Method Overriding
14. Dynamic Method Dispatch
15. Association In Java
16. Inheritance in Java
17. Aggregation in java
18. Command Line Argument
19. Execute Command Line
20. Read Input From Command Line
21. Abstract Class In Java
22. Interface in Java
23. Cutom Marker Interface
24. Constructor In Java
25. Package in Java
26. Acess Modifier In Java
27. Static Import In Java
28. Package Class In Java
29. This Keyword
30. Instance Intializer Block
31. Super Keyword
32. Static Keyword
33. Final Keyword


                                                                        Next: Features of Java

Programming language overview

As we are going to start learning Java, which is a programming language. So, let us have a brief look at programming language first.

What is language?

A way of communication is known as language. e.g. Hindi, English etc.

What is a Program?

A set of instructions which is used to perform a specific task.

What is a Programming Language?   

An artificial language used to write programs which can be translated into machine language and executed by computer with the help of some special software.

What is a Platform?   

Dictionary meaning: A raised level surface on which things can stand.
In programming: Hardware or software on which a program can execute/run.
e.g. – c, c++, Java etc.

Overview of Java

What is Java?

Java is a  high level programming language and also known as platform because of its JRE (java runtime environment).

Brief History of Java.

Java language project initially started in June 1991 by James Gosling, Mike Sheridan, and Patrick Naughton. An oak tree stood outside Gosling’s office at that time and java named as oak initially. It later renamed as Green and was later renamed as java from java coffee.

Base concept of java language project.

Write once, run anywhere (WORA) – that means java program can run anywhere and on any platform. When java code is compiled it is converted into byte code. Now only this byte code is needed to run using JVM, no need of source code and recompilation.

Java released versions:

  1. 1. JDK Alpha and Beta (1995)
    2. JDK 1.0 (23rd Jan, 1996)
    3. JDK 1.1 (19th Feb, 1997)
    4. J2SE 1.2 (8th Dec, 1998)
    5. J2SE 1.3 (8th May, 2000)
    6. J2SE 1.4 (6th Feb, 2002)
    7. J2SE 5.0 (30th Sep, 2004)
    8. Java SE 6 (11th Dec, 2006)
    9. Java SE 7 (28th July, 2011)
    10. Java SE 8 (18th March, 2014)