java实现洗牌 发牌

package com.java.lei.homework;import java.util.Arrays;import java.util.Random;public class PokerGame {    //1.创建数组，用以存储扑克牌    static String[] pokers = new String[54];        public static void main(String[] args) {                //2.创建牌  所有的牌赋值到array数组中        pokers = newPoker();        //3.洗牌  这里的实参pokers是经过创建牌之后新生成的pokers        String[] pokers2 = upsetPoker(pokers);        //4.发牌　　　            sendPoker(pokers2);}    //创建牌的方法    public static String[] newPoker() {        //1.定义花色数组        String[] colors = {"红桃","黑桃","梅花","方片"};        //2.定义牌面数组        String[] numbers = {"A","2","3","4","5","6","7","8","9","10","J","Q","K"};        //3.定义王        String[] kings = {"大王","小王"};                //4.使用循环将牌存储到pokers数组               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.大小王拷贝入pokers数组        System.arraycopy(kings, 0, pokers, index, 2);        //6.输出牌        System.out.println("现有一副扑克牌" + Arrays.toString(pokers) + "\n");                return pokers;    }        //洗牌的方法    public static String[] upsetPoker(String[] array) {        //1.定义新的数组，用以存储洗好的牌        String[] newpokers = new String[pokers.length];        //2.定义数组，用以标识被随机取出的牌        boolean[] mark = new boolean[pokers.length];                //3.洗牌        for(int i = 0 ; i < pokers.length ; i ++) {            //a.创建随机数            Random rd = new Random();            //b.获取随机数的下标            int index = rd.nextInt(pokers.length);            //c.判断标识            if(mark[index] == false) {                //d.将未洗过的牌存储入newpokers                newpokers[i] = pokers[index];                //e.修改标识，被洗过的牌标记为true            }else {                i --; //该次取随机数取到的是洗过的牌，则重新再取一次            }        }                //newpokers内的牌拷贝到数组pokers        pokers = Arrays.copyOf(newpokers, newpokers.length);        System.out.println("洗过的牌：" + Arrays.toString(newpokers)+"\n");        return newpokers;    }        //发牌的方法    public static void sendPoker(String[] array) {        //1.定义玩家及底牌数组        String[] one = new String[0];        String[] two = new String[0];        String[] three = new String[0];        String[] underpoker = new String[3];                //2.循环进行发牌        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));    }}