package java8; public interface Showable { void show(); // void display(); default void display(){ System.out.println("in display method"); } } class Test1 implements Showable{ @Override public void show() { System.out.println("Test 1"); } } class Test2 implements Showable{ @Override public void show() { System.out.println("Test 2"); } } class Test3 implements Showable{ @Override public void show() { System.out.println("Test 3"); } @Override public void display() { Showable.super.display(); } }