interface

 /**

 * usinginterface

 */

public class usinginterface {

    public static void main(String[] args) {

        queen q = new queen();

        q.moves();

        king k = new king();

        k.moves();

        pawn p = new pawn();

        p.moves();

    }

}

interface chessplayer {

    void moves();

}

class queen implements chessplayer {

    public void moves() {

        System.out.println("up,down,left,right,diagonal");

    }

}

class king implements chessplayer {

    public void moves() {

        System.out.println("up,down,left,right by 1 move");

    }

}

class pawn implements chessplayer {

    public void moves() {

        System.out.println("up,down,left,right");

    }

}