【java筑基】斗地主小游戏——Collections工具类排序功能应用

public class SortTest {
	public static void main(String[] args) {
		ArrayList nums = new ArrayList();
		nums.add(5);
		nums.add(54);
		nums.add(15);
		nums.add(1);
		nums.add(35);
		// [5, 54, 15, 1, 35]
		System.out.println(nums);
		Collections.reverse(nums);
		// [35, 1, 15, 54, 5]
		System.out.println(nums);
		Collections.sort(nums);
		//[1, 5, 15, 35, 54]
		System.out.println(nums);
		//每次随机排序
		Collections.shuffle(nums);
		System.out.println(nums);
	}
}

public class SearchTest {
	public static void main(String[] args) {
		ArrayList nums = new ArrayList();
		nums.add(2);
		nums.add(-5);
		nums.add(3);
		nums.add(0);
		System.out.println(nums);
		System.out.println(Collections.max(nums));
		Collections.replaceAll(nums, 0, 1);
		System.out.println(nums);
		Collections.sort(nums);
		System.out.println(nums);
	}
}

    public class SynchronizedTest {
    	public static void main(String[] args) {
    		Collection c=Collections.synchronizedCollection(new ArrayList());
    		List list=Collections.synchronizedList(new ArrayList());
    	}
    }

    public class UnmodifiableTest {
    	public static void main(String[] args) {
    		// 创建空的、不可改变的对象
    		List unmodifiableList = Collections.emptyList();
    		Map scores = new HashMap();
    		scores.put("语文", 99);
    		scores.put("数学", 98);
    		Map unmodifiableMap = Collections.unmodifiableMap(scores);
    		// java.lang.UnsupportedOperationException
    		// unmodifiableList.add("1");
    		//unmodifiableMap.put("英语", 80);
    	}
    }

    public class ShowHand {
    	// 支持玩家数
    	private final int PLAY_NUM = 3;
    	private String[] types = { "方块", "草花", "红心", "黑桃" };
    	private String[] values = { "2", "3", "4", "5", "6", "7", "8", "9", "10",
    			"J", "Q", "K", "A" };
    	// 每局游戏中桌上剩下的牌,其数量不确定，且增删频繁，用LinkedList存储
    	private List<String> cards = new LinkedList<String>();
    	private String[] players = new String[PLAY_NUM];
    	// 玩家手中的牌
    	private List<String>[] playersCards = new List[PLAY_NUM];
    
    	/**
    	 * 初始化扑克牌，放入52张扑克牌 并且洗牌(随机排序)
    	 */
    	public void initCards() {
    		for (int i = 0; i < types.length; i++) {
    			for (int j = 0; j < values.length; j++) {
    				cards.add(types[i] + values[j]);
    			}
    		}
    		Collections.shuffle(cards);
    	}
    
    	/**
    	 * 初始化玩家,分配姓名
    	 */
    	public void initPlayers(String... names) {
    		if (names.length > PLAY_NUM || names.length < 2) {
    			System.out.println("玩家数不对");
    			return;
    		} else {
    			for (int i = 0; i < names.length; i++) {
    				players[i] = names[i];
    			}
    		}
    	}
    
    	/**
    	 * 初始化玩家手中扑克牌:每个玩家开始时手中扑克牌数量为null 程序使用长度为0的LinkedList表示
    	 */
    	public void initPlayerCards() {
    		for (int i = 0; i < players.length; i++) {
    			if (players[i] != null && !players[i].equals("")) {
    				playersCards[i] = new LinkedList<String>();
    			}
    		}
    	}
    
    	/**
    	 * 用于测试,输出全部桌上未派出扑克牌
    	 */
    	public void showAllCards() {
    		for (String card : cards) {
    			System.out.println(card);
    		}
    	}
    
    	/**
    	 * 派扑克牌
    	 * 
    	 * @param first
    	 *            最先派给谁
    	 */
    	public void deliverCard(String first) {
    		// first元素在数组中的下标
    		int firstPos = ArrayUtils.indexOf(players, first) - 1;
    		for (int i = firstPos; i < PLAY_NUM; i++) {
    			if (players[i] != null) {
    				playersCards[i].add(cards.get(0));
    				cards.remove(0);
    			}
    		}
    		for (int i = 0; i < firstPos; i++) {
    			if (players[i] != null) {
    				playersCards[i].add(cards.get(0));
    				cards.remove(0);
    			}
    		}
    	}
    
    	/**
    	 * 输出玩家手上的扑克牌 
    	 */
    	public void showPlayerCards() {
    		for (int i = 0; i < PLAY_NUM; i++) {
    			if (players[i] != null) {
    				System.out.println(players[i] + ":");
    				for (String card : playersCards[i]) {
    					System.out.print(card + "\t");
    				}
    			}
    			System.out.println();
    		}
    	}
    
    	public static void main(String[] args) {
    		ShowHand sh = new ShowHand();
    		sh.initPlayers("小白", "小黄", "小黑");
    		sh.initCards();
    		sh.initPlayerCards();
    		sh.showAllCards();
    		System.out.println("----------");
    		sh.deliverCard("小黄");
    		sh.showPlayerCards();
    		sh.deliverCard("小黑");
    		sh.showPlayerCards();
    	}
    }