3.23作业

1.设计一个用户类User，类中的变量有用户名、密码和记录用户数量的变量，定义3个构造方法：无参的、为用户名赋值的、为用户名和密码赋值的，还有获取和设置密码的方法和返回类信息的方法     

2.

设计一副牌Poker的外部类和一张牌Card的内部类。

（1）Poker类中定义私有成员花色数组、点数数组以及一副牌的数组属性，提供构造方法（创建并初始化一副牌的数组）、随机洗牌方法shuffle（Math.random()获取[0,1)的随机数；获取[n,m)的随机数公式为Math.random()*(m-n)+n）和发牌方法deal。

（2）Card类中定义花色和点数属性，提供打印信息方法。

（3）定义测试类并在main()方法中创建一副牌Poker对象，并调用shufle()进行洗牌，调用deal()进行发牌。

package com.QCS;

public class Poker {
public class Card {
private String suite;
private int face;
public Card(String suite, int face) {
this.suite = suite;
this.face = face;
}
public String toString() {
String faceStr = "";
switch (face) {
case 1:
faceStr = "A";
break;
case 11:
faceStr = "J";
break;
case 12:
faceStr = "Q";
break;
case 13:
faceStr = "K";
break;
default:
faceStr = String.valueOf(face);
}
return suite + faceStr;
}

}
private static String[] suites = { "黑桃", "红桃", "梅花", "梅花", "方块" };
private static int[] faces = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
private Card[] cards;
public Poker() {
cards = new Card[52];
for (int i = 0; i < suites.length; i++) {
for (int j = 0; j < faces.length; j++) {
cards[i * 13 + j] = new Card(suites[i], faces[j]);
}
}
}

public void shuffle()
{
int len = cards.length;
for (int i = 0; i < len; i++)
{
int index = (int) (Math.random() * len);
Card temp = cards[index];
cards[index] = cards[i];
cards[i] = temp;
}
}

public Card getCard(int index)
{
return cards[index];
}

}

package com.QCS;

public class Test {
public static void main(String[] args) {
Poker poker=new Poker();
poker.shuffle();
Poker.Card c1 = poker.getCard(0);
Poker.Card c2 = poker.getCard(1);
System.out.println(c1);
System.out.println(c2);

}

}