package?com.imooc;import?java.util.HashSet;public?class?Test?{/**?*?一、創建一副撲克牌?包括四種花色：黑桃、紅桃、梅花、方片?十三種點數?2-10，JQKA?不考慮大小王?*?二、創建兩名玩家??玩家至少要有ID、姓名、手牌等屬性，手牌為撲克牌的集合?*?三、洗牌??將只按創建的“一副撲克牌”打亂順序?*?四、發牌?將洗牌之后的撲克牌集合，從第一張開始，發給兩名玩家，按照一人一張的方式，每人發兩張?*?五、游戲?比較兩名玩家手中的撲克牌，規則為：取兩人各自手中點數最大的牌進行比較，點數大的贏;?*?????????若兩人各自的點數最大的牌相等，則再按花色比較?*?@param?args?*/		/*	*?創建并展示撲克牌	*/	static?Card[]?c?=?		???{new?Card("黑桃",1),new?Card("黑桃",2),new?Card("黑桃",3),new?Card("黑桃",4),new?Card("黑桃",5),new?Card("黑桃",6),			new?Card("黑桃",7),new?Card("黑桃",8),new?Card("黑桃",9),new?Card("黑桃",10),new?Card("黑桃",11),new?Card("黑桃",12),new?Card("黑桃",13),			new?Card("紅桃",1),new?Card("紅桃",2),new?Card("紅桃",3),new?Card("紅桃",4),new?Card("紅桃",5),new?Card("紅桃",6),			new?Card("紅桃",7),new?Card("紅桃",8),new?Card("紅桃",9),new?Card("紅桃",10),new?Card("紅桃",11),new?Card("紅桃",12),new?Card("紅桃",13),			new?Card("梅花",1),new?Card("梅花",2),new?Card("梅花",3),new?Card("梅花",4),new?Card("梅花",5),new?Card("梅花",6),			new?Card("梅花",7),new?Card("梅花",8),new?Card("梅花",9),new?Card("梅花",10),new?Card("梅花",11),new?Card("梅花",12),new?Card("梅花",13),			new?Card("方片",1),new?Card("方片",2),new?Card("方片",3),new?Card("方片",4),new?Card("方片",5),new?Card("方片",6),			new?Card("方片",7),new?Card("方片",8),new?Card("方片",9),new?Card("方片",10),new?Card("方片",11),new?Card("方片",12),new?Card("方片",13),			};		public?static?void?createCard(){		System.out.println("----------創建撲克牌...----------");		System.out.println("----------撲克牌創建成功！----------");		System.out.print("為：[");		System.out.print(c[0].color+c[0].point);		for(int?i=1;i<52;i++){			System.out.print(","+c[i].color+c[i].point);		}		System.out.println("]");			}	/*	*?洗牌	*/	public?static?void?washCard(){		System.out.println("-----------開始洗牌...----------");		HashSet<Card>?cardsToSelect?=?new?HashSet<Card>();		System.out.println("----------洗牌結束！----------");		for(int?i=0;i<52;i++){			cardsToSelect.add(c[i]);		}		for(Card?s?:?cardsToSelect){			System.out.print(s.color+s.point+"?");		}	}	public?static?void?main(String[]?args)?{		//?TODO?Auto-generated?method?stub		createCard();		washCard();	}}

寫完洗牌后，發現不管怎么洗，遍歷出來的都是一樣的。HashSet不是無序的嗎？