用java ArrayList集合編寫(xiě)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;

}

}

請(qǐng)問(wèn)用java數(shù)組編寫(xiě)洗牌程序怎么寫(xiě)？我剛學(xué)java，請(qǐng)多指教，謝謝?。。?/h2>

package xly04;

import java.util.Random;

public class ArrayDemo3 {

/**

* 數(shù)組應(yīng)用：

* 1 隨機(jī)洗牌

* 2 順序發(fā)牌

*/

public static void main(String[] args) {

String[] cards=new String[]{"黑桃A","黑桃2","黑桃3","黑桃4",

"黑桃5","黑桃6","黑桃7","黑桃8","黑桃9","黑桃10","黑桃J","黑桃Q","黑桃K",

"紅桃A","紅桃2","紅桃3","紅桃4","紅桃5","紅桃6","紅桃7","紅桃8","紅桃9",

"紅桃10","紅桃J","紅桃Q","紅桃K","方塊A","方塊2","方塊3","方塊4","方塊5",

"方塊6","方塊7","方塊8","方塊9","方塊10","方塊J","方塊Q","方塊K","梅花A",

"梅花2","梅花3","梅花4","梅花5","梅花6","梅花7","梅花8","梅花9","梅花10",

"梅花J","梅花Q","梅花K","大王","小王"};

//Random random=new Random();.......(1)

//int index=random.nextInt(10);//[0,10) %10

//System.out.println(index);

//String card=cards[random.nextInt(cards.length)];//長(zhǎng)度為8，隨機(jī)下標(biāo)[0,8)

//System.out.println(card);//隨機(jī)的某張牌

for(int i=cards.length-1;i=1;i--){

int j=new Random().nextInt(i);//或者（1）不注銷(xiāo)用int j=random.nextInt(i);

String t=cards[i];

cards[i]=cards[j];

cards[j]=t;

}

for(int i=0;icards.length;i++){

System.out.print(cards[i]+",");

}

System.out.println();//輸出回車(chē)字符

//順序發(fā)牌：順序的將每個(gè)牌發(fā)給每個(gè)人

String[] players=new String[]{"馬伊琍","文章","六六"};

//int i=0;

//System.out.println(players[i++%players.length]);

//System.out.println(players[i++%players.length]);

//System.out.println(players[i++%players.length]);

//System.out.println(players[i++%players.length]);

//System.out.println(players[i++%players.length]);

//System.out.println(players[i++%players.length]);

for(int i=0;icards.length;i++){

//i=0,1,2,3,4,5,6,7

String card=cards[i];//card 代表每張撲克牌

String player=players[i%players.length];

//player代表每個(gè)玩游戲的人

System.out.println(player+":"+card);

}

}

}

java洗牌算法問(wèn)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(lèi)的toSting方法

注：所有類(lèi)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

}

}