final method: If you make any method as final, you cannot override it.

Java Programming Language Class, Object and Methods in java (Article) Class, Object and Methods in java (Program)

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Program:

class Parent{
  final void age(){
	  System.out.println("my age is 90");
	  }
}

class Child extends Parent{
   void age(){
	   System.out.println("my age is 20");
	   }

   public static void main(String args[]){
   Child obj= new Child();
   obj.age();
   }
}

Output:

Output:Compile Time Error
 error: age() in Child cannot override age() in Parent
   void age(){
        ^
  overridden method is final
1 error

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