商场推出幸运抽奖活动的java初级代码编写

public class Lucky {

public static void main(String[] args){

System.out.println("请输入您的4位会员卡号:")

Scanner sc = new Scanner(System.in)

int number = sc.nextInt() //接收用户从控制台输入的会员卡号，并保存在会员卡号变量中

int a = number/1000//千位

int b = number%1000/100//百位

int c = number%100/10//十位

int d = number%10 //个位

if((a+b+c+d)>20){

System.out.println("恭喜中奖!您是幸运客户")

}else{

System.out.println("谢谢参与!")

}

}

}

最基础的 没有异常判断 无限循环输入什么东西

找了两组程序：

代码一：

import java.awt.*

import java.awt.event.*

import javax.swing.*

class GoodLucky extends JFrame implements ActionListener

{

JTextField tf = new JTextField()

JButton b1 = new JButton("开始")

JButton b2 = new JButton("停止")

boolean sg=false

public GoodLucky(){

b1.setActionCommand("start")

JPanel p = new JPanel()

p.add(b1)

p.add(b2)

b1.addActionListener(this)

b2.addActionListener(this)

b2.setEnabled(false)

this.getContentPane().add(tf,"North")

this.getContentPane().add(p,"South")

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)

this.setSize(300,200)

this.setLocation(300,300)

Cursor cu = new Cursor(Cursor.HAND_CURSOR)

this.setCursor(cu)

this.setVisible(true)

tf.setText("祝大家鸿运！")

this.go()

}

public void go()

{

while(true)

{

if(sg==true)

{

String s = " "

for(int j = 1j <= 7j++)

{

int i = (int)(Math.random() * 9) + 1

if(i <10)

{

s = s + " 0" + i

}

else

{

s = s + " " + i

}

}

tf.setText(s)

}

try

{

Thread.sleep(100)

}

catch(java.lang.InterruptedException e)

{

e.printStackTrace()

}

}

}

public void actionPerformed(ActionEvent e)

{

String s = e.getActionCommand()

if(s.equals("start"))

{

sg = true

b1.setEnabled(false)

b2.setEnabled(true)

}

else

{

sg= false

b2.setEnabled(false)

b1.setEnabled(true)

}

}

public static void main(String[] args)

{

new GoodLucky()

}

}

代码二：

package com.softeem.lesson03

import java.awt.BorderLayout

import java.awt.Container

import java.awt.Font

import java.awt.event.MouseAdapter

import java.awt.event.MouseEvent

import javax.swing.JButton

import javax.swing.JFrame

import javax.swing.JLabel

import javax.swing.JPanel

import javax.swing.JTextField

public class LuckyNumberInterface extends JFrame {

JLabel ltitle = new JLabel("欢迎使用本抽奖机", JLabel.CENTER)

JLabel linput = new JLabel("幸运号码：")

JTextField input = new JTextField(20)

JButton btnStart = new JButton("开始")

JButton btnStop = new JButton("停止")

JPanel lpanel = new JPanel()

JPanel btnPanel = new JPanel()

public LuckyNumberInterface() {

super("抽奖机")

final LuckyNumber ln = new LuckyNumber(input)

ln.start()

Container container = getContentPane()

lpanel.add(linput)

lpanel.add(input)

btnPanel.add(btnStart)

btnPanel.add(btnStop)

Font font = new Font("宋体", Font.BOLD, 16)

ltitle.setFont(font)

container.add(ltitle, BorderLayout.NORTH)

container.add(lpanel, BorderLayout.CENTER)

container.add(btnPanel, BorderLayout.SOUTH)

btnStart.addMouseListener(new MouseAdapter() {

@Override

public void mouseClicked(MouseEvent arg0) {

ln.setFlag(true)

}

})

btnStop.addMouseListener(new MouseAdapter() {

@Override

public void mouseClicked(MouseEvent arg0) {

ln.setFlag(false)

}

})

setDefaultCloseOperation(EXIT_ON_CLOSE)

setSize(400, 120)//设置窗口的显示大小

setLocation(400, 300)//设置窗口显示的位置

setVisible(true)//显示窗口

}

public static void main(String[] args) {

new LuckyNumberInterface()

}

}

package com.softeem.lesson03

import java.text.DecimalFormat

import java.util.Random

import javax.swing.JTextField

public class LuckyNumber extends Thread {

private String luckyNumber = ""

private boolean flag = false//开关

private JTextField input

public LuckyNumber(JTextField input) {

this.input = input

}

public void setFlag(boolean flag) {

this.flag = flag

}

@Override

public void run() {

while (true) {

if (flag) {

generatorLuckyNumber()

}

}

}

public void generatorLuckyNumber() {

String[] firstNumber = { "130", "131", "134", "137", "135", "139",

"150", "151", "155", "158", "159" }

Random rd = new Random()

int number = rd.nextInt(10000)

DecimalFormat df = new DecimalFormat("0000")

String lastNumber = df.format(number)

luckyNumber = firstNumber[rd.nextInt(firstNumber.length)] + "****"

+ lastNumber

input.setText("")

input.setText(luckyNumber)

}

}

<!DOCTYPE html>

<html>

<head>

<title>js随机抽奖一二三等奖不重复的抽奖逻辑怎么设置</title>

<meta charset="UTF-8" />

<script>

//添加一个随机函数

Math.rand = function(min, max){

function subRand(min, max){

min = min ? min : 0

max = max ? max : 9

var result = 0

do{

result = Math.random().toString().substr(2, 1)

}while(!(result >= min && result <= max))

return result

}

function getBit(maxBit){

maxBit = maxBit ? maxBit : max.toString().length

var result = [],

count = 0

for(var i = 0 i < maxBit i++){

result.push(subRand())

if(i != 0 && result[i] == result[i - 1]){

count++

}

}

return maxBit - count

}

min = min ? min : 0

max = max ? max : 0

var result = '',

bit = getBit()

do{

result = ''

for(var i = 0 i < bit i++){

result = result + subRand()

}

result = parseInt(result)

}while(!(result >= min && result <= max))

return result

}

//console.log(Math.rand(0, 100))

//LuckDraw 抽奖类 参数一 奖池数组， 参数二 中奖数量 返回 中奖索引

function LuckDraw(pool, numberOfWinners){

var results = [],

//是否已经中奖

isExists = function(index){

for(var i = 0 i < results.length i++){

if(results[i] == index){

return true

}

}

return false

},

subLuckDraw = function(){

do{

result = Math.rand(0, pool.length - 1)

}while(isExists(result))

return result

}

for(var i = 0 i < numberOfWinners i++){

results.push(subLuckDraw())

}

return results

}

var pool = [

'关',

'张',

'赵',

'马',

'黄',

'曹老板'

]

winners = LuckDraw(pool, 3) //返回从奖池中 中奖的索引，假设123等奖都只有一名的话各取一个即可

//假设123等奖 一等奖 1名， 二等奖 2名， 三等奖 3名， 只需要调用这个函数第二个参数设置为总和 6 即可

//然后从结果中第一个索引为一等奖 23 索引为二等奖 ， 456索引为 三等奖

console.log(winners)

</script>

</head>

<body>

<script>

for(var i = 0 i < winners.length i++){

document.write(pool[winners[i]] + ' 恭喜你中了' + (i + 1) + '等奖<br />')

}

</script>

</body>

</html>

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