Simple Java Program or Structure of Java Programming

Simple Java Program or Structure of Java Programming-:
[Note-:
In java we can not Start a progrram without Class.]


Structure-:

Class  class_name
{
public Static void main(String args[ ])
{
\\set of instruction
}
}


Explanation-

1. Void main () must be public because it must be accessed outside the class and start the progrram execution .
2. Void main() must be static bcoz it must be available before object creation.

[Note-:  

if we declare any component in java as static that is available before object creation.]

    

   3.Main () method must be void because it's non-return type method.

    4.In java void main is by default command line argument programe ,which is passed  with String arrray as parameter .

We can use keyword Static & public interchanging.