Session 1: Basic Introduction About Java

What is java?

• Java is platform independent programming Language.
• Java is Object Oriented Programming Language.

• Ex:- we can execute or run java program any of the platform like windows, Linux, Android, etc.But You must have to JVM for that Platform.

• This can be happen because of byte code & java virtual machine (JVM).

• Byte code is not a “machine level”, It is intermediate language which can understand by JVM.

• JavaC is Java Compiler which does two Responsibility or task.

         1) Check the syntax

         2) And convert the java program to Byte code.

      Ex:- ( .Java to .Class )

JVM Dose lot's of Responsibilities Some of which are following Below:

•  Work has interpreter.
• Converts byte code to machine level language (based on operating system).
• JVM is platform dependent.
•  Byte code is platform independent.