枚举 猜拳游戏

package 猜拳游戏; import static 猜拳游戏.OutCome.*; public enum RoshamBo2 implements Competitor<RoshamBo2> { PAPER(DRAW, LOSE, WIN){ @Override public String toString() { return "布 "; } }, SCISSORS(WIN, DRAW, LOSE) { @Override public String toString() { return "剪刀"; } }, ROCK(LOSE, WIN, DRAW) { @Override public String toString() { return "石头"; } }; public abstract String toString(); private OutCome vPAPER, vSICISSOR, vROCK; RoshamBo2(OutCome paper, OutCome scissors, OutCome rcok){ this.vPAPER = paper; this.vSICISSOR = scissors; this.vROCK = rcok; } @Override public OutCome compete(RoshamBo2 it) { switch (it){ default: return null; case PAPER:return vPAPER; case SCISSORS:return vSICISSOR; case ROCK:return vROCK; } } public static void main(String [] argv){ RoShamBo.play(RoshamBo2.class, 20); } }