Java 



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 Java was invented by James Gosling in 1995 sun microsystems the initial name of Java is "Oak"

• the team who developed the Java is called as Green team, before Java they develop a programming language that  is green talk and the  and the extension of that program is .gt

 Object Oriented programming

1. Abstraction.

2. Encapsulation

3. Inheritance

4. Polymorphism

1. Abstraction:  Hiding of unnecessary data and provides only essential information

2. Encapsulation: Binding of data and the code.
•It just act as a backbone 

Advantage: Securing the data.

3. Inheritance:  acquiring the property of one class by another class is called is inheritance.
Example:  surname and generic feature.

4. Polymorphism:   Taking multiple form is called as polymorphism or changing properties is called as polymorphism.

• Java is not only a programming language but also a platform

• Java is platform because it has its own environment for developing and executing the program.

Platforms :-
JRE: stands for Java runtime environment
• It also contain JDK
JDK:  stands for ava Development Kit