前言
以下是学习Java顺序表的一个实例应用———简单的洗牌算法。
欢迎关注个人主页：逸狼
创造不易，可以点点赞吗~
如有错误，欢迎指出~
目录
前言
定义每张扑克牌的属性
生成一副扑克牌（不包含大小王）
洗牌方法
发牌方法
发牌测试
结果
简单的洗牌算法
定义每张扑克牌的属性
package Demo;
public class Card {
public int rank;//数字
public String suit;//花色
public Card(int rank,String suit){
this.rank=rank;
this.suit=suit;
}
@Override
public String toString() {
return "{" + suit + " "+ rank + '}';
}
}生成一副扑克牌（不包含大小王）
package Demo;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
public class Cards {
//4个花色 13张牌
public static final String[] suits={"♥","♠","♣","♦"};
//生成一副牌52张 4*13 不包含大小王
public List<Card> buyCard(){
List<Card> cardList=new ArrayList<>();
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 13; j++) {
int rank=j;
String suit=suits[i];
Card card=new Card(rank,suit);
cardList.add(card);//生成一张牌
}
}
return cardList;
}
}洗牌方法
//洗牌
public void shuffle(List<Card> cardList){
Random random=new Random();
//让i=51，生成一个0~i的随机数，与i交换。i--，重复此过程，洗牌
for (int i = cardList.size()-1;i>0; i--) {
int randIndex= random.nextInt(i);//生成0~i的随机数放入randIndex
swap(cardList,i,randIndex);
}
}
//写一个交换方法，交换i和j下标的牌
private void swap(List<Card> cardList,int i,int j){
Card tmp=cardList.get(i);
cardList.set(i,cardList.get(j));
cardList.set(j,tmp);
}发牌方法
//三个人， 每个人轮流抓5张牌
public void drawCard(List<Card> cardList){
List<Card> hand1=new ArrayList<>();
List<Card> hand2=new ArrayList<>();
List<Card> hand3=new ArrayList<>();
List<List<Card>>hands=new ArrayList<>();
hands.add(hand1);
hands.add(hand2);
hands.add(hand3);
for (int i = 0; i < 5; i++) {//i代表5张牌
for (int j = 0; j < 3; j++) {//j代表3个人
Card card=cardList.remove(0); //怎么抓牌？ 每次删除0下标的牌
hands.get(j).add(card);//hands.get(0)=hand1,以此类推
}
}
System.out.println("第1个人的牌："+hand1);
System.out.println("第2个人的牌："+hand2);
System.out.println("第3个人的牌："+hand3);
}发牌测试
package Demo;
import java.util.List;
public class TestCard {
public static void main(String[] args) {
Cards cards=new Cards();
List<Card> cardList=cards.buyCard();
System.out.println("生成一副扑克牌：");
System.out.println(cardList);
cards.shuffle(cardList);
System.out.println("洗牌后：");
System.out.println(cardList);
System.out.println("抓牌：");
cards.drawCard(cardList);
System.out.println("剩下的牌：");
System.out.println(cardList);
}
}结果
生成一副扑克牌：
[{♥ 0}, {♥ 1}, {♥ 2}, {♥ 3}, {♥ 4}, {♥ 5}, {♥ 6}, {♥ 7}, {♥ 8}, {♥ 9}, {♥ 10}, {♥ 11}, {♥ 12}, {♠ 0}, {♠ 1}, {♠ 2}, {♠ 3}, {♠ 4}, {♠ 5}, {♠ 6}, {♠ 7}, {♠ 8}, {♠ 9}, {♠ 10}, {♠ 11}, {♠ 12}, {♣ 0}, {♣ 1}, {♣ 2}, {♣ 3}, {♣ 4}, {♣ 5}, {♣ 6}, {♣ 7}, {♣ 8}, {♣ 9}, {♣ 10}, {♣ 11}, {♣ 12}, {♦ 0}, {♦ 1}, {♦ 2}, {♦ 3}, {♦ 4}, {♦ 5}, {♦ 6}, {♦ 7}, {♦ 8}, {♦ 9}, {♦ 10}, {♦ 11}, {♦ 12}]
洗牌后：
[{♦ 9}, {♠ 9}, {♥ 7}, {♥ 4}, {♠ 4}, {♥ 0}, {♥ 10}, {♣ 7}, {♠ 6}, {♥ 5}, {♣ 4}, {♥ 1}, {♠ 1}, {♥ 11}, {♦ 3}, {♦ 1}, {♥ 2}, {♣ 10}, {♣ 1}, {♣ 0}, {♣ 2}, {♥ 12}, {♦ 4}, {♥ 8}, {♣ 9}, {♠ 11}, {♠ 12}, {♣ 5}, {♦ 12}, {♠ 0}, {♠ 7}, {♦ 8}, {♦ 11}, {♦ 2}, {♠ 5}, {♥ 3}, {♣ 12}, {♥ 9}, {♣ 3}, {♦ 5}, {♦ 0}, {♠ 8}, {♦ 10}, {♠ 2}, {♦ 7}, {♠ 10}, {♠ 3}, {♥ 6}, {♦ 6}, {♣ 8}, {♣ 11}, {♣ 6}]
抓牌：
第1个人的牌：[{♦ 9}, {♥ 4}, {♥ 10}, {♥ 5}, {♠ 1}]
第2个人的牌：[{♠ 9}, {♠ 4}, {♣ 7}, {♣ 4}, {♥ 11}]
第3个人的牌：[{♥ 7}, {♥ 0}, {♠ 6}, {♥ 1}, {♦ 3}]
剩下的牌：
[{♦ 1}, {♥ 2}, {♣ 10}, {♣ 1}, {♣ 0}, {♣ 2}, {♥ 12}, {♦ 4}, {♥ 8}, {♣ 9}, {♠ 11}, {♠ 12}, {♣ 5}, {♦ 12}, {♠ 0}, {♠ 7}, {♦ 8}, {♦ 11}, {♦ 2}, {♠ 5}, {♥ 3}, {♣ 12}, {♥ 9}, {♣ 3}, {♦ 5}, {♦ 0}, {♠ 8}, {♦ 10}, {♠ 2}, {♦ 7}, {♠ 10}, {♠ 3}, {♥ 6}, {♦ 6}, {♣ 8}, {♣ 11}, {♣ 6}]
