java語言實現簡單的洗牌，發牌

java學習過程中，老師讓寫了個簡單的斗地主洗牌發牌的程序，一下就是程序代碼：

package com.java.lei.homework;

import java.util.Arrays;
import java.util.Random;

public class PokerGame {

    //1.創建數組，用以存儲撲克牌
    static String[] pokers = new String[54];
    
    public static void main(String[] args) {        
        //2.創建牌  所有的牌賦值到array數組中
        pokers = newPoker();
        //3.洗牌  這里的實參pokers是經過創建牌之后新生成的pokers
        String[] pokers2 = upsetPoker(pokers);
        //4.發牌　　　    
        sendPoker(pokers2);
}

    //創建牌的方法
    public static String[] newPoker() {
        //1.定義花色數組
        String[] colors = {"紅桃","黑桃","梅花","方片"};
        //2.定義牌面數組
        String[] numbers = {"A","2","3","4","5","6","7","8","9","10","J","Q","K"};
        //3.定義王
        String[] kings = {"大王","小王"};
        
        //4.使用循環將牌存儲到pokers數組
       
        int index = 0;
        for(int i = 0 ; i < numbers.length ; i ++) {
            for(int j = 0 ; j < colors.length ; j ++) {
                pokers[index ++] = colors[j] + numbers[i];
            }
        }
        
        //5.大小王拷貝入pokers數組
        System.arraycopy(kings, 0, pokers, index, 2);
        //6.輸出牌
        System.out.println("現有一副撲克牌" + Arrays.toString(pokers) + "\n");
        
        return pokers;
    }
    
    //洗牌的方法
    public static String[] upsetPoker(String[] array) {
        //1.定義新的數組，用以存儲洗好的牌
        String[] newpokers = new String[pokers.length];
        //2.定義數組，用以標識被隨機取出的牌
        boolean[] mark = new boolean[pokers.length];
        
        //3.洗牌
        for(int i = 0 ; i < pokers.length ; i ++) {
            //a.創建隨機數
            Random rd = new Random();
            //b.獲取隨機數的下標
            int index = rd.nextInt(pokers.length);
            //c.判斷標識
            if(mark[index] == false) {
                //d.將未洗過的牌存儲入newpokers
                newpokers[i] = pokers[index];
                //e.修改標識，被洗過的牌標記為true
            }else {
                i --; //該次取隨機數取到的是洗過的牌，則重新再取一次
            }
        }
        
        //newpokers內的牌拷貝到數組pokers
        pokers = Arrays.copyOf(newpokers, newpokers.length);
        System.out.println("洗過的牌：" + Arrays.toString(newpokers)+"\n");
        return newpokers;
    }
    
    //發牌的方法
    public static void sendPoker(String[] array) {
        //1.定義玩家及底牌數組
        String[] one = new String[0];
        String[] two = new String[0];
        String[] three = new String[0];
        String[] underpoker = new String[3];
        
        //2.循環進行發牌
        for(int i = 0 ; i < pokers.length-3 ; i++) {
            if(i % 3 == 0) {
                one = Arrays.copyOf(one, one.length+1);
                one[one.length-1] = pokers[i];
            }else if(i % 3 == 1) {
                two = Arrays.copyOf(two, two.length+1);
                two[two.length-1] = pokers[i];
            }else if(i % 3 == 2) {
                three = Arrays.copyOf(three, three.length+1);
                three[three.length-1] = pokers[i];
            }
        }
        
        System.arraycopy(pokers, pokers.length-3, underpoker, 0, 3);
        
        System.out.println("玩家1:" + Arrays.toString(one));
        System.out.println("玩家2:" + Arrays.toString(two));
        System.out.println("玩家3:" + Arrays.toString(three));
        System.out.println("底牌:" + Arrays.toString(underpoker));
    }

}