java抽奖程序,可设置不同奖品获得概率

import javaawtEventQueue;

import javaawtTextArea;

import javaawtTextField;

import javaawteventActionEvent;

import javaawteventActionListener;

import javautilRandom;

import javaxswingJButton;

import javaxswingJFrame;

import javaxswingJLabel;

import javaxswingJPanel;

import javaxswingJTextArea;

import javaxswingJTextField;

import javaxswingborderEmptyBorder;

public class LuckySelect extends JFrame {

private JPanel contentPane;

private JTextField textFieldA;

private JTextField textFieldB;

private JTextField textFieldC;

private TextField textField;

private JTextField textFieldResult;

private JTextArea textArea;

/

  Launch the application

 /

public static void main(String[] args) {

EventQueueinvokeLater(new Runnable() {

public void run() {

try {

LuckySelect frame = new LuckySelect();

framesetVisible(true);

} catch (Exception e) {

eprintStackTrace();

}

}

});

}

/

  Create the frame

 /

public LuckySelect() {

setDefaultCloseOperation(JFrameEXIT_ON_CLOSE);

setBounds(100, 100, 450, 251);

contentPane = new JPanel();

contentPanesetBorder(new EmptyBorder(5, 5, 5, 5));

contentPanesetLayout(null);

setContentPane(contentPane);

JLabel lblA = new JLabel("A");

lblAsetBounds(10, 128, 54, 15);

contentPaneadd(lblA);

JLabel lblB = new JLabel("B");

lblBsetBounds(124, 128, 54, 15);

contentPaneadd(lblB);

JLabel lblC = new JLabel("C");

lblCsetBounds(254, 128, 54, 15);

contentPaneadd(lblC);

textFieldA = new JTextField();

textFieldAsetBounds(30, 125, 66, 21);

contentPaneadd(textFieldA);

textFieldAsetColumns(10);

textFieldB = new JTextField();

textFieldBsetColumns(10);

textFieldBsetBounds(149, 125, 66, 21);

contentPaneadd(textFieldB);

textFieldC = new JTextField();

textFieldCsetColumns(10);

textFieldCsetBounds(264, 125, 66, 21);

contentPaneadd(textFieldC);

textField = new TextField();

textFieldsetBounds(98, 167, 157, 21);

contentPaneadd(textField);

textFieldsetColumns(10);

textFieldResult = new JTextField();

textFieldResultsetBounds(280, 167, 66, 21);

contentPaneadd(textFieldResult);

textFieldResultsetColumns(10);

textFieldAsetText("10");

textFieldBsetText("10");

textFieldCsetText("10");

JButton button = new JButton("\u62BD\u5956");

buttonaddActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

select();

}

});

buttonsetBounds(0, 166, 93, 23);

contentPaneadd(button);

textArea = new JTextArea();

textAreasetBounds(30, 31, 306, 83);

contentPaneadd(textArea);

}

protected void select() {

// TODO Auto-generated method stub

int aNum = Integerdecode(textFieldAgetText());

int bNum = Integerdecode(textFieldBgetText());

int cNum = Integerdecode(textFieldBgetText());

Random r = new Random();

int random = rnextInt(aNum + bNum + cNum);

if(random <= aNum){

textFieldAsetText(IntegertoString(Integerdecode(textFieldAgetText()) - 1));

textAreaappend(IntegertoString(random) + "抽中了A\n");

}else if(random <= aNum + bNum){

textFieldBsetText(IntegertoString(Integerdecode(textFieldBgetText()) - 1));

textAreaappend(IntegertoString(random) + "抽中了B\n");

}else if(random <= aNum + bNum + cNum){

textFieldCsetText(IntegertoString(Integerdecode(textFieldCgetText()) - 1));

textAreaappend(IntegertoString(random) + "抽中了C\n");

}

}

}

用一个Int[]数组记录随机到的数字，

插代码：

int[] count=new i[6];//用于接收生成的随机数

for(int i=0;i<ilength;i++)

{

Random rand = new Random(); int c = randnextInt(); //int范围类的随机数 c = randnextInt(30); //生成0-30以内的随机数 c = (int)(Mathrandom() 30); //0-30以内的随机数 count[i]=c;}

import javautilScanner;

public class LuckyNumber {

/

幸运抽奖

/

public static

void main(String[] args) {

String answer

= "y"; // 标识是否继续

String

userName = ""; // 用户名

String

password = ""; // 密码

int cardNumber

= 0; // 卡号

boolean

isRegister = false; // 标识是否注册

boolean

isLogin = false; // 标识是否登录

int max =

9999;

int min =

1000;

Scanner input

= new Scanner(Systemin);

do {

Systemoutprintln("欢迎进入奖客富翁系统");

Systemoutprintln("\t1注册");

Systemoutprintln("\t2登录");

Systemoutprintln("\t3抽奖");

Systemoutprintln("");

Systemoutprint("请选择菜单：");

int choice =

inputnextInt();

switch

(choice) {

case 1:

Systemoutprintln("[奖客富翁系统

> 注册]");

Systemoutprintln("请填写个人注册信息：");

Systemoutprint("用户名：");

userName =

inputnext();

Systemoutprint("密码：");

password =

inputnext();

//

获取4位随机数作为卡号

cardNumber =

(int)(Mathrandom()(max-min))+min;

Systemoutprintln("\n注册成功，请记好您的会员卡号");

Systemoutprintln("用户名\t密码\t会员卡号");

Systemoutprintln(userName

+ "\t" + password + "\t" + cardNumber);

isRegister =

true; // 注册成功，标志位设置为true

break;

case 2:

Systemoutprintln("[奖客富翁系统

> 登录]");

if

(isRegister) { // 判断是否注册

//

3次输入机会

for (int i

= 1; i <= 3; i++) {

Systemoutprint("请输入用户名：");

String

inputName = inputnext();

Systemoutprint("请输入密码：");

String

inputPassword = inputnext();

if

(userNameequals(inputName) && passwordequals(inputPassword)) {

Systemoutprintln("\n欢迎您："

+ userName);

isLogin =

true; // 登录成功，标志位设置为true

break;

} else if

(i < 3) {

Systemoutprintln("用户名或密码错误，还有"

+ (3 - i) + "次机会！");

} else

{

Systemoutprintln("您3次均输入错误！");

}

}

} else

{

Systemoutprintln("请先注册，再登录！");

}

break;

case 3:

Systemoutprintln("[奖客富翁系统

> 抽奖]");

if

(!isLogin) { // 判断是否登录

Systemoutprintln("请先登录，再抽奖！");

} else

{

//生成5个4位随机数字，并保存在数组中

int[]

luckynums = new int[5];

for(int i

= 0; i < luckynumslength; i++){

luckynums[i] =

(int)(Mathrandom()(max-min))+min;

}

Systemoutprint("请输入您的卡号：");

int

yourcard = inputnextInt();

int

i;

Systemoutprint("\n本日的幸运数字为：");

for (i = 0;

i < luckynumslength; i++) {

Systemoutprint(luckynums[i]

+ " ");\

}

for (i = 0;

i < luckynumslength; i++) {

if

(luckynums[i] == yourcard) {

Systemoutprintln("\n恭喜！您是本日的幸运会员！");

break;

}

}

if (i ==

luckynumslength) {

Systemoutprintln("\n抱歉！您不是本日的幸运会员！");

}

}

break;

default:

Systemoutprintln("[您的输入有误！]");

break;

}

Systemoutprint("继续吗？（y/n）:");

answer =

inputnext();

Systemoutprintln("");

} while

("y"equals(answer));

if

("n"equals(answer)) {

Systemoutprintln("系统退出，谢谢使用！");

}

}

}

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