用java ArrayList集合編寫撲克牌洗牌與發(fā)牌

import java.util.ArrayList;

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import java.util.Random;

public class PokerDemo {

ArrayListCard poker = new ArrayListCard();

Player[] players;

int n = 4;

String[] name = {"Wang", "Zhang", "Li", "Yuan"};

public PokerDemo() {

players = new Player[n];

for(int i = 0; i players.length; i++)

players[i] = new Player(name[i]);

for(int i = 0; i 4; i++)

for(int j = 0; j 13; j++)

poker.add(new Card(i, j));

System.out.println("洗牌前: " + poker);

xipai();

System.out.println("洗牌后: " + poker);

fapai();

System.out.println("發(fā)牌后: ");

for(int i = 0; i players.length; i++)

System.out.println(players[i]);

}

public void xipai() {

Random r = new Random();

ArrayListCard tmp = new ArrayListCard();

while(!poker.isEmpty()) {

int index = r.nextInt(poker.size());

Card card = poker.get(index);

tmp.add(card);

poker.remove(index);

}

poker = new ArrayListCard(tmp);

}

public void fapai() {

int p = 0;

while(!poker.isEmpty()) {

Card card = poker.get(0);

players[p].add(card);

p = (p + 1) % n;

poker.remove(0);

}

}

public static void main(String[] args) {

new PokerDemo();

}

}

class Card {

int val, sty;

final String[] value = {"A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K"};

final String[] style = {"黑桃", "紅心", "梅花", "方塊"};

public Card(int s, int v) {

sty = s;

val = v;

}

public String toString() {

return style[sty]+ " " + value[val];

}

}

class Player {

ArrayListCard cards = new ArrayListCard();

String name;

public Player(String n) {

name = n;

}

public void add(Card card) {

cards.add(card);

}

public String toString() {

return name + ":\t" + cards;

}

}

java 中如何實(shí)現(xiàn)一副撲克牌洗牌的功能。如果無法書寫完整的代碼，可以用文字描述出自己的實(shí)現(xiàn)思路

1.定義牌類

public class Card{

public int id;//牌大小

public String number;//牌值名稱

public String color;//花色

}

2.定義牌組,用ArrayList存放所有牌

ArrayListCard cardGroup =new ArrayListCard();

3.定義花色枚舉

public static final String[] COLORS=new String[]{"方塊","梅花","紅桃","黑桃"};

4.定義牌值大小枚舉

public static fina String[] CARDVALUES=new String[]{"A","1","2","3",

"4","5","6","7","8","9","10","J","Q","K","King_Small","King_Big"};

5.初始化牌組,這就是一副新牌，沒切過，己經(jīng)排好序的

public void initCardGroup(){

//加入A~K

for(int i=0;i13;i++){

for (int j=0;j4;j++){

//生成一張牌的對(duì)象

Card card=new Card();

card.id=i;

card.color=COLORS[j];

card.munber=CARDVALUES[i];

//將對(duì)象加入牌組

cardGroup.add(card);

}

}

//加入大小王

Card card_k1=new Card();

card_k1.id=13;

card_k1.color="King_Small";

card_k1.number="King_Small";

cardGroup.add(card_k1);

Card card_k2=new Card();

card_k2.id=14;

card_k2.color="King_big";

card_k2.number="King_big";

cardGroup.add(card_k2);

}

6. 洗牌，將原牌組打亂，得到新的牌組

public ArrayListCard flushCardsGroup(ArrayListCard src){

ArrayListCard result=new ArrayListCard();

while(src.size0){

int size=src.size();

//以size為限，生成0~size之間的隨機(jī)數(shù)

Random r=new Random();

int index=r.nextInt(size);

//對(duì)index做個(gè)檢查

if(index0){index=0;}

if(indexsize-1){index=size-1;}

//index就是撿出來的牌，加到新的數(shù)組中，從原來數(shù)組中刪除

Card card=src.get(index);

result.add(card);

card.remove(index);

}

return result;

}

java洗牌算法問題

你指的是Card里的toString方法吧

public?String?toString()?{

String?aa?=?suit?+?"?"?+?num?+?"??";

return?aa;

}

toString這個(gè)方法一般在?System.out.print時(shí)使用，這個(gè)是打印出String，JVM就是默認(rèn)調(diào)用類的toSting方法

注：所有類都有toString方法，默認(rèn)是當(dāng)前對(duì)象的hashcode，即內(nèi)存地址

所以在發(fā)牌是打印

public?void?dealcard()//發(fā)牌

{

for(int?i=0;i52;i++)

{

if(i%4==0i!=0){

System.out.println();??//每發(fā)4張牌輸出換行

}

//?就是這里，默認(rèn)調(diào)用card的toString方法

System.out.print(card[i]);?//依次輸出?發(fā)的牌

}

}