JAVA

final method meaning

When a METHOD is declared with final keyword, it is called a final method. 
A final method cannot be OVERRIDEN.
when a CLASS is declared final then it cant be INHERITED.
when a VARIABLE is declared final its value cant be CHANGED.

final method meaning

public class Counter {
    private int counter = 0;

    public final int count() {
        return counter++;
    }

    public final int reset() {
        return (counter = 0);
    }
}

final Method Java

class FinalDemo {
    // create a final method
    public final void display() {
      System.out.println("This is a final method.");
    }
}

class Main extends FinalDemo {
  // try to override final method
  public final void display() {
    System.out.println("The final method is overridden.");
  }

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