final class: If you make any class as final, you cannot extend it.

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

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Program:

 final class Parent{
	int a=30;
	void display(){
		  System.out.println("parent class");
	  }
	}

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

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

Output:

Output:Compile Time Error
error: cannot inherit from final Parent
class Child extends Parent{
                    ^
1 error

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