Chapter: Interfaces

Create an interface, and inherit two new interfaces from that interface. Multiply inherit a third interface from the second two.

package chapter.interfaces;

interface AI {
    void top();
}

interface BI extends AI {
    void left();
}

interface CI extends AI {
    void right();
}

interface DI extends CI, BI {
    void bottom();
}

class EC implements DI {
    public void top() {System.out.println("Top");}
    public void left() {System.out.println("Left");}
    public void right() {System.out.println("Right");}
    public void bottom() {System.out.println("Bottom");}
}

public class Exercise13 {    
    public static void main(String[] args) {    
        EC e = new EC();
        e.top();
        e.left();
        e.right();
        e.bottom();
    }
}