Java Default Method

public interface A {
    void print();
    default void display() {
        System.out.println("A");
    }
}

public interface B {
    void print();
    default void display() {
        System.out.println("B");
    }
}

If implement single interface

public class Testing    implements A {

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

    @Override
    public void print() {
         System.out.println("print");
       
    }

}

If implement multiple interface with same default method

public class Testing    implements A,B {

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

    @Override
    public void display() {
        B.super.display(); //if we want call A class then A.super.display
    }

    @Override
    public void print() {
         System.out.println("print");
       
    }

}