# ArrayList的使用方法

> 来源：梦飞idc云平台 | 原文：https://www.mfisp.com/22478.html | 发布：2023-07-27 | 更新：2023-07-27 | 分类：建站教程

ArrayList的使用方法：

 

public class Card {  
 public int rank;//牌面色  
 public String suit;//花色

 

public Card(String suit,int rank) {  
 this.rank = rank;  
 this.suit = suit;  
 }

 

@Override  
 public String toString() {  
 return suit + " " + rank;  
 }  
}

 

public class Test {  
 //花色： 红桃 黑桃 梅花 方片  
 private static final String[] SUITS = {"♥","♠","♣","♦"};

 

public static void main(String[] args) {  
 List<Card> cards = buyCard();//买牌  
 System.out.println(cards);  
 System.out.println("洗牌：");  
 shuffle(cards);  
 System.out.println(cards);  
 //三个人每个人轮流揭5张牌  
 List<Card> hand1 = new ArrayList<>();  
 List<Card> hand2 = new ArrayList<>();  
 List<Card> hand3 = new ArrayList<>();  
 List<List<Card>> hand = new ArrayList<>();  
 hand.add(hand1);  
 hand.add(hand2);  
 hand.add(hand3);  
 for (int i = 0; i < 5; i++) {  
 for (int j = 0; j < 3; j++) {  
 //揭牌动作  
 Card card = cards.remove(0);  
 //如何翻到指定人的手里呢？  
 hand.get(j).add(card);  
 }  
 }  
 System.out.println("第1个人的牌：");  
 System.out.println(hand1);  
 System.out.println("第2个人的牌：");  
 System.out.println(hand2);  
 System.out.println("第3个人的牌：");  
 System.out.println(hand3);

 

}

 

private static void shuffle(List<Card> cards) {  
 Random random = new Random();  
 for (int i = cards.size() - 1; i > 0; i--) {  
 int j = random.nextInt(i);  
 //交换  
 Card card = cards.get(i);  
 cards.set(i,cards.get(j));  
 cards.set(j,card);  
 }  
 }

 

private static List<Card> buyCard() {  
 List<Card> cards = new ArrayList<>();  
 for (int i = 0; i < SUITS.length; i++) {  
 for (int j = 1; j <= 13; j++) {  
 Card card = new Card(SUITS[i],j);  
 cards.add(card);  
 }  
 }  
 return cards;  
 }  
}

 

输出结果：

 

[♥ 1, ♥ 2, ♥ 3, ♥ 4, ♥ 5, ♥ 6, ♥ 7, ♥ 8, ♥ 9, ♥ 10, ♥ 11, ♥ 12, ♥ 13, ♠ 1, ♠ 2, ♠ 3, ♠ 4, ♠ 5, ♠ 6, ♠ 7, ♠ 8, ♠ 9, ♠ 10, ♠ 11, ♠ 12, ♠ 13, ♣ 1, ♣ 2, ♣ 3, ♣ 4, ♣ 5, ♣ 6, ♣ 7, ♣ 8, ♣ 9, ♣ 10, ♣ 11, ♣ 12, ♣ 13, ♦ 1, ♦ 2, ♦ 3, ♦ 4, ♦ 5, ♦ 6, ♦ 7, ♦ 8, ♦ 9, ♦ 10, ♦ 11, ♦ 12, ♦ 13]  
 洗牌：  
 [♥ 11, ♦ 7, ♦ 8, ♦ 2, ♦ 9, ♦ 10, ♥ 1, ♦ 11, ♥ 7, ♣ 12, ♦ 6, ♦ 3, ♦ 4, ♠ 12, ♦ 5, ♠ 13, ♠ 10, ♠ 3, ♣ 11, ♦ 12, ♣ 6, ♣ 7, ♣ 5, ♥ 6, ♦ 13, ♠ 4, ♥ 13, ♠ 6, ♥ 12, ♣ 8, ♣ 9, ♥ 5, ♥ 3, ♥ 10, ♥ 8, ♣ 4, ♠ 8, ♣ 13, ♠ 2, ♥ 2, ♠ 5, ♠ 1, ♣ 10, ♣ 3, ♠ 11, ♥ 9, ♦ 1, ♣ 1, ♠ 7, ♣ 2, ♥ 4, ♠ 9]  
 第1个人的牌：  
 [♥ 11, ♦ 2, ♥ 1, ♣ 12, ♦ 4]  
 第2个人的牌：  
 [♦ 7, ♦ 9, ♦ 11, ♦ 6, ♠ 12]  
 第3个人的牌：  
 [♦ 8, ♦ 10, ♥ 7, ♦ 3, ♦ 5]

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