public class InterfaceTestProg {
public static void main (String [] args) {
ClassAB ab = new ClassAB ();
ab.printA ();
ab.printB ();
ab.printAB ();
}
interface InterfaceA {public void printA ();}
interface InterfaceB {public void printB ();}
interface InterfaceAB extends InterfaceA, InterfaceB {public void printAB ();}
public static class ClassAB implements InterfaceAB {
ClassAB () {}
public void printA () {System.out.println ("A");}
public void printB () {System.out.println ("B");}
public void printAB () {System.out.println ("AB");}
}
}
