Static keyword

This is a non-access modifier in java which is mainly used for memory management.

This keyword is applicable to 3 things:

  1. variable
  2. block
  3. methods

Static entities belongs to class.

1. Static variable

This is like a global variable. i.e. shareable to all. And it gets memory once when it is declared inside a class.

2. Static block

The statements of the static block will be executed before the main method.

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3. Static methods

you can call static methods without creating objects because static belongs to class.

Final keyword

This is also a non-access modifier. This keyword is applicable to:

  1. variable
  2. class
  3. methods

To use final keyword final is used.

1. Final variable

when a variable is declared with the final keyword, its value can not be modified and it is initialized once.

 

2. Final class

when you declare a class as final you can not inherit this class.

 

3. Final Method

when you declare a method as final, you can not override that method.

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