About Final

Know about basics of final , where to use and when compiler sees final keyword then how it reacts?

FIRST BASIC PART OF FINAL 

How final is used inside a method for local variables and as parameter of any methods ?

FINAL WITH LOCAL VARIABLES 

Can we use final with class definition? if yes how it will affect the relationship between the classes? can we use final with the instance methods, if yes then what the restriction it can impose?

USE OF FINAL AT CLASS LEVEL