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

我写给你，如果是本专业，以后要多多学习。JDK 1.6

import java.awt.GridLayout

import java.awt.event.MouseEvent

import java.awt.event.MouseListener

import java.util.Iterator

import java.util.Random

import java.util.Set

import java.util.TreeSet

import javax.swing.JButton

import javax.swing.JFrame

import javax.swing.JTextField

public class LuckyDrawn {

private JFrame f = new JFrame("Lucky Drawn")

private JButton btn = new JButton("Drawn")

private JTextField result = new JTextField("Result")

private static final int MIN = 1

private static final int MAX = 30

private static final int RESULT_COUNT = 7

public LuckyDrawn(){

f.add(btn)

f.add(result)

result.setEditable(false)

btn.addMouseListener(new MouseListener(){

public void mouseClicked(MouseEvent e) {

Random rand = new Random()

Set<Integer>set = new TreeSet<Integer>()

while(set.size() <RESULT_COUNT){

set.add(new Integer(rand.nextInt(MAX)+ 1))

}

StringBuffer sb = new StringBuffer("Lucky numbers are: ")

for (Iterator iter = set.iterator()iter.hasNext()) {

sb.append(((Integer) iter.next()).intValue()).append(", ")

}

result.setText(sb.substring(0, sb.length() - 2).toString())

f.pack()

}

public void mouseEntered(MouseEvent e) {}

public void mouseExited(MouseEvent e) {}

public void mousePressed(MouseEvent e) {}

public void mouseReleased(MouseEvent e) {}

})

f.setLayout(new GridLayout(2, 1))

f.setVisible(true)

f.setLocation(500, 200)

f.pack()

f.validate()

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)

}

public static void main(String[] args) {

new LuckyDrawn()

}

}

你是要JAVA可视化的 还是控制台的啊？

控制台的话你可以用循环来取中奖号，将其存入list或set里（最好是set，因为set本来就不会重复）。如果用list存就另外写一个循环方法，来挨个判定该元素是不是已经在list中存在了，如果存在，就让选号的再加选一次，如果不重复，就放到list里去。。。。OK

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