Collection 层次结构中的根接口。Collection表示一组对象,这些对象也称为collection的元素。一些 collection 允许有重复的元素,而另一些则不允许。一些 collection 是有序的,而另一些则是无序的。JDK 不提供此接口的任何直接 实现:它提供更具体的子接口(如 Set 和 List)实现。此接口通常用来传递 collection,并在需要最大普遍性的地方操作这些 collection。
主要内容:这里使用collection集合,模拟香港电影中大佬们玩的扑克牌游戏。
1、游戏规则:两个玩家每人手中发两张牌,进行比较。比较每个玩家手中牌最大的点数,大小由A-2,点数大者获胜。如果点数相同,则比较花色,大小由黑(4)、红(3)、梅(2)、方(1),花色大者获胜。
2、实现步骤:
创建一副扑克牌A-2,四种花色黑(4)、红(3)、梅(2)、方(1)共52张牌;
创建两个玩家包含玩家ID和姓名、所持牌Card信息;
洗牌并向两位玩家各发两张牌;
比较玩家手中牌大小,得出获胜者;
3、程序实现
牌Card类:包含牌的数字和花色
package collectiontest.games; public class Card { private Integer id; //牌的大小 private Integer type;//牌的花色 public Card(Integer id, Integer type) { this.id = id; this.type = type; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public Integer getType() { return type; } public void setType(Integer type) { this.type = type; } @Override public String toString() { return "Card [id=" + id + ", type=" + type + "]"; } }
扑克牌Poker类:包含扑克牌Card A-2
package collectiontest.games; public class Poker { private Card id2 ; private Card id3 ; private Card id4 ; private Card id5 ; private Card id6 ; private Card id7 ; private Card id8 ; private Card id9 ; private Card id10 ; private Card J ; private Card Q ; private Card K ; private Card A ; public Poker() { } //四个类型:黑--4、红--3、梅--2、方--1 public Poker(Integer type) { this.id2 = new Card(2, type); this.id3 = new Card(3, type); this.id4 = new Card(4, type); this.id5 = new Card(5, type); this.id6 = new Card(6, type); this.id7 = new Card(7, type); this.id8 = new Card(8, type); this.id9 = new Card(9, type); this.id10 = new Card(10, type); this.J = new Card(11, type); this.Q = new Card(12, type); this.K = new Card(13, type); this.A = new Card(14, type); } public Card getId2() { return id2; } public void setId2(Card id2) { this.id2 = id2; } public Card getId3() { return id3; } public void setId3(Card id3) { this.id3 = id3; } public Card getId4() { return id4; } public void setId4(Card id4) { this.id4 = id4; } public Card getId5() { return id5; } public void setId5(Card id5) { this.id5 = id5; } public Card getId6() { return id6; } public void setId6(Card id6) { this.id6 = id6; } public Card getId7() { return id7; } public void setId7(Card id7) { this.id7 = id7; } public Card getId8() { return id8; } public void setId8(Card id8) { this.id8 = id8; } public Card getId9() { return id9; } public void setId9(Card id9) { this.id9 = id9; } public Card getId10() { return id10; } public void setId10(Card id10) { this.id10 = id10; } public Card getJ() { return J; } public void setJ(Card j) { J = j; } public Card getQ() { return Q; } public void setQ(Card q) { Q = q; } public Card getK() { return K; } public void setK(Card k) { K = k; } public Card getA() { return A; } public void setA(Card a) { A = a; } }
玩家Player类:包含玩家ID和姓名、所持卡片信息
package collectiontest.games; import java.util.ArrayList; import java.util.List; public class Player { //玩家的ID private String id ; //玩家姓名 private String name ; //玩家所持牌 private List<Card> pokerType ; public Player() { } public Player(String id, String name, List<Card> pokerType) { this.id = id; this.name = name; this.pokerType = new ArrayList<>(); } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public List<Card> getPokerType() { return pokerType; } public void setPokerType(List<Card> pokerType) { this.pokerType = pokerType; } }
扑克牌游戏主类:包含1)扑克牌创建 2)玩家创建 3)洗牌 4)发牌 5)比较胜负
package collectiontest.games; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Scanner; import java.util.Set; public class GamsBegin { // 创建扑克牌 public Set<Poker> cPoker() { System.out.println("**********开始创建扑克牌**********"); // 创建一副poker // 四个类型:黑--4、红--3、梅--2、方--1 Set<Poker> pokers = new HashSet<>(); Poker[] poker = { new Poker(1), new Poker(2), new Poker(3), new Poker(4) }; /* * Collections工具类的使用 * Collections.addAll(pokers, new Poker(1), new Poker(2), new Poker(3),new Poker(4)); * * */ pokers.addAll(Arrays.asList(poker)); System.out.println("**********扑克牌创建成功**********"); return pokers; } // 创建两个玩家 public Map<String, Player> cPlayer() { System.out.println("**********开始创建玩家**********"); Map<String, Player> map = new HashMap<String, Player>(); // 控制数量 Integer control = 0; System.out.println("创建两名玩家,根据提示创建"); Scanner console = new Scanner(System.in); while (true) { System.out.println("请输入第 "+(control+1)+" 个玩家ID:"); String courseId = console.next(); if (isNumeric(courseId)) { System.out.println("请输入第 "+(control+1)+" 个玩家姓名:"); String courseName = console.next(); Player players = new Player(courseId, courseName, null); //保存数据 map.put(courseId, players); System.out.println("添加第 " + (control + 1) + " 个玩家 " + courseName + " 成功"); //数量自加 control++; } else { System.out.println("*****请输入数字ID*****"); continue; } if (control == 2) { break; } } System.out.println("**********玩家创建成功**********"); return map; } // 判断输入是否为数字, Character.isDigit()为java方法 public boolean isNumeric(String str) { for (int i = 0; i < str.length(); i++) { if (!Character.isDigit(str.charAt(i))) { return false; } } return true; } /** * 洗牌 :也可以产生52个不同随机数,实现洗牌 * **/ public List<Card> wPoker(Set<Poker> pokers) { System.out.println("**********开始洗牌**********"); //利用List的有序排序,洗牌之后保存顺序不变 List<Card> listCard = new ArrayList<>(); // 利用Set集合的无序排序,实现洗牌 Set<Card> listSet = new HashSet<>(); //保存到Set集合,无序 for (Poker pk : pokers) { listSet.add(pk.getId2()); listSet.add(pk.getId3()); listSet.add(pk.getId4()); listSet.add(pk.getId5()); listSet.add(pk.getId6()); listSet.add(pk.getId7()); listSet.add(pk.getId8()); listSet.add(pk.getId9()); listSet.add(pk.getId10()); listSet.add(pk.getJ()); listSet.add(pk.getQ()); listSet.add(pk.getK()); listSet.add(pk.getA()); } //保存在List集合,有序 for (Card cd : listSet) { listCard.add(cd); System.out.println(cd); } System.out.println("**********洗牌成功**********"); return listCard; } // 发牌 public Map<String, Player> pushPoker(List<Card> listCard, Map<String, Player> pMap) { System.out.println("**********发牌开始**********"); // 控制每人发两张牌后结束 int control = 0; for (Map.Entry<String, Player> entry : pMap.entrySet()) { if (control == 0) { for (int i = 0; i < 3; i = i + 2) { // 发牌 entry.getValue().getPokerType().add(listCard.get(i)); } // 更新map对象 pMap.put(entry.getKey(), entry.getValue()); control++; } else if (control == 1) { for (int i = 1; i < 4; i = i + 2) { // 发牌 entry.getValue().getPokerType().add(listCard.get(i)); } // 更新map对象 pMap.put(entry.getKey(), entry.getValue()); control++; } else { break; } } System.out.println("**********发牌成功**********"); return pMap; } public void compareMatch(Map<String, Player> newMap) { /*比较胜负 * 1.首先取得每个玩家手中最大牌的ID和花色ID。 * 2.比较俩玩家手中最大牌的ID大小,牌大者获胜。 * 3.如果两张牌的ID相等,在比较两张牌的花色ID,花色ID更大着获胜。 * * */ List<Player> players = new ArrayList<>(); // 获得两个玩家 for (Map.Entry<String, Player> entry : newMap.entrySet()) { players.add(entry.getValue()); } // 玩家一信息和所持牌 List<Card> playerOne = players.get(0).getPokerType(); //获得最大牌的ID和花色 Integer oneMaxId = Math.max(playerOne.get(0).getId(), playerOne.get(1) .getId()); Integer oneMaxType = (oneMaxId!=playerOne.get(0).getId()) ? playerOne.get(1).getType() : playerOne.get(0).getType() ; // 玩家二信息和所持牌 List<Card> playerTwo = players.get(1).getPokerType(); //获得最大牌的ID和花色 Integer twoMaxId = Math.max(playerTwo.get(0).getId(), playerTwo.get(1) .getId()); Integer twoMaxType = (twoMaxId!=playerTwo.get(0).getId()) ? playerTwo.get(1).getType() : playerTwo.get(0).getType() ; if (oneMaxId > twoMaxId) { System.out.println("玩家 : " + players.get(0).getName() + " 获胜!!"); } else if (oneMaxId == twoMaxId) { if (oneMaxType > twoMaxType) { System.out .println("玩家 : " + players.get(0).getName() + " 获胜!!"); } else { System.out .println("玩家 : " + players.get(1).getName() + " 获胜!!"); } } else { System.out.println("玩家 : " + players.get(1).getName() + " 获胜!!"); } System.out.println("**********************************************"); System.out.println("玩家 : " + players.get(0).getName() + "的牌是:" + showName(playerOne.get(0).getType(), 0) + "--" + showName(playerOne.get(0).getId(), 1) + " " + showName(playerOne.get(1).getType(), 0) + "--" + showName(playerOne.get(1).getId(), 1)); System.out.println("玩家 : " + players.get(1).getName() + "的牌是:" + showName(playerTwo.get(0).getType(), 0) + "--" + showName(playerTwo.get(0).getId(), 1) + " " + showName(playerTwo.get(1).getType(), 0) + "--" + showName(playerTwo.get(1).getId(), 1)); } // 显示牌的名称 private String showName(Integer i, Integer type) { String str = ""; // 显示花色 if (type == 0) { switch (i) { case 1: { str = "方块"; break; } case 2: { str = "梅花"; break; } case 3: { str = "红桃"; break; } case 4: { str = "黑桃"; break; } default: { break; } } } // 显示数字 if (type == 1) { if (i < 11) { return i.toString(); } else { switch (i) { case 11: { str = "J"; break; } case 12: { str = "Q"; break; } case 13: { str = "K"; break; } case 14: { str = "A"; break; } default: { break; } } } } return str; } public static void main(String[] args) { GamsBegin gb = new GamsBegin(); // 1、创建扑克牌 Set<Poker> pokers = gb.cPoker(); // 2、创建两个玩家 Map<String, Player> pMap = gb.cPlayer(); // 3、洗牌 List<Card> listCard = gb.wPoker(pokers); // 4、发牌 Map<String, Player> newMap = gb.pushPoker(listCard, pMap); // 4、比较胜负 gb.compareMatch(newMap); } }
运行结果:
**********开始创建扑克牌**********
**********扑克牌创建成功**********
**********开始创建玩家**********
创建两名玩家,根据提示创建
请输入第 1 个玩家ID:
请输入第 1 个玩家姓名:
周星驰
添加第 1 个玩家 周星驰 成功
请输入第 2 个玩家ID:
请输入第 2 个玩家姓名:
周润发
添加第 2 个玩家 周润发 成功
**********玩家创建成功**********
**********开始洗牌**********
Card [id=9, type=3]
Card [id=11, type=4]
Card [id=13, type=3]
Card [id=8, type=3]
Card [id=5, type=2]
Card [id=6, type=1]
Card [id=4, type=3]
Card [id=5, type=4]
Card [id=2, type=3]
Card [id=9, type=2]
Card [id=9, type=4]
Card [id=14, type=2]
Card [id=9, type=1]
Card [id=2, type=1]
Card [id=2, type=4]
Card [id=7, type=4]
Card [id=11, type=1]
Card [id=10, type=1]
Card [id=14, type=4]
Card [id=14, type=3]
Card [id=12, type=2]
Card [id=2, type=2]
Card [id=10, type=2]
Card [id=7, type=1]
Card [id=7, type=3]
Card [id=8, type=2]
Card [id=4, type=4]
Card [id=13, type=4]
Card [id=14, type=1]
Card [id=12, type=1]
Card [id=5, type=1]
Card [id=6, type=4]
Card [id=12, type=4]
Card [id=11, type=2]
Card [id=10, type=3]
Card [id=3, type=4]
Card [id=12, type=3]
Card [id=4, type=2]
Card [id=4, type=1]
Card [id=6, type=2]
Card [id=5, type=3]
Card [id=8, type=4]
Card [id=3, type=2]
Card [id=13, type=2]
Card [id=7, type=2]
Card [id=3, type=3]
Card [id=3, type=1]
Card [id=6, type=3]
Card [id=8, type=1]
Card [id=11, type=3]
Card [id=13, type=1]
Card [id=10, type=4]
**********洗牌成功**********
**********发牌开始**********
**********发牌成功**********
玩家 : 周星驰 获胜!!
**********************************************
玩家 : 周星驰的牌是:红桃--9 红桃--K
玩家 : 周润发的牌是:黑桃--J 红桃--8
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