Ⅰ 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
Ⅱ 用swing编写一个java抽奖的程序，至少有5个按钮，显得高大上一点。
‍
importjava.awt.Color;//界面不是很高大上档次，但是能满足你的基本需求，希望对你有用
importjava.awt.Font;
importjava.awt.GridLayout;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;
importjavax.swing.JButton;
importjavax.swing.JFrame;
importjavax.swing.JOptionPane;
importjavax.swing.border.Border;
importjavax.swing.border.LineBorder;
publicclass抽奖游戏extendsJFrame{
static抽奖游戏frame;
public抽奖游戏(){
setLayout(newGridLayout(3,3,3,3));
Borderborder=newLineBorder(Color.BLUE,4);
JButtonl1=newJButton();
JButtonl2=newJButton();
JButtonl3=newJButton();
JButtonl4=newJButton();
JButtonl5=newJButton();
JButtonl6=newJButton();
JButtonl7=newJButton("祝你好运");
JButtonl8=newJButton("中奖规则");
JButtonl9=newJButton("再次抽奖");
l1.setBorder(border);
l2.setBorder(border);
l3.setBorder(border);
l4.setBorder(border);
l5.setBorder(border);
l6.setBorder(border);
l7.setBorder(border);
l8.setBorder(border);
l9.setBorder(border);
String[]num2={"1","2","3","4","5","6"};
l8.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEventarg0){
//TODOAuto-generatedmethodstub
JOptionPane.showMessageDialog(null,"游戏规则: "+"特等奖: "
+"第一行或者第二行出现的数字全部相同 "
+"第一第二行出现升序的1,2,3,4,5,6或者降序的6,5,4,3,2,1 "+"一等奖 "
+"1:第一行或第二行的数字降序排列或者升序排列 "
+"2:第一行或者第二行相邻的按钮出现一样的数字 ");
}
});
l9.addActionListener(newActionListener(){
@Override
publicvoidactionPerformed(ActionEvente){
//TODOAuto-generatedmethodstub
l1.setText("*");
l2.setText("*");
l3.setText("*");
l4.setText("*");
l5.setText("*");
l6.setText("*");
l7.setBackground(Color.lightGray);
l7.setText("离中奖不远了！");
}
});
l6.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEventarg0){
//TODOAuto-generatedmethodstub
intj1=(int)(Math.random()*10)%6;
l1.setText(num2[j1]);
intj2=(int)(Math.random()*10)%6;
l2.setText(num2[j2]);
intj3=(int)(Math.random()*10)%6;
l3.setText(num2[j3]);
intj4=(int)(Math.random()*10)%6;
l4.setText(num2[j4]);
intj5=(int)(Math.random()*10)%6;
l5.setText(num2[j5]);
intj6=(int)(Math.random()*10)%6;
l6.setText(num2[j6]);
if(j1==j2&&j2==j3||j4==j5&&j5==j6||j1==1
&&j2==2&&j3==3&&j4==4&&j5==5&&j6==6
||j1==6&&j2==5&&j3==4&&j4==3&&j5==2
&&j6==1){
l7.setBackground(Color.red);
l7.setText("特等奖");
}elseif(j1>j2&&j2>j3||j3>j2&&j2>j1||j4>j5
&&j5>j6||j6>j5&&j5>j4||j1==j2
&&j5==j4||j1==j2&&j5==j6||j3==j2
&&j4==j5||j5==j6&&j2==j3){
l7.setBackground(Color.YELLOW);
l7.setText("一等奖");
}else{
l7.setBackground(Color.lightGray);
l7.setText("未中奖，加油！");
}
}
});
l5.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEventarg0){
//TODOAuto-generatedmethodstub
intj1=(int)(Math.random()*10)%6;
l1.setText(num2[j1]);
intj2=(int)(Math.random()*10)%6;
l2.setText(num2[j2]);
intj3=(int)(Math.random()*10)%6;
l3.setText(num2[j3]);
intj4=(int)(Math.random()*10)%6;
l4.setText(num2[j4]);
intj5=(int)(Math.random()*10)%6;
l5.setText(num2[j5]);
intj6=(int)(Math.random()*10)%6;
l6.setText(num2[j6]);
if(j1==j2&&j2==j3||j4==j5&&j5==j6||j1==1
&&j2==2&&j3==3&&j4==4&&j5==5&&j6==6
||j1==6&&j2==5&&j3==4&&j4==3&&j5==2
&&j6==1){
l7.setBackground(Color.red);
l7.setText("特等奖");
}elseif(j1>j2&&j2>j3||j3>j2&&j2>j1||j4>j5
&&j5>j6||j6>j5&&j5>j4||j1==j2
&&j5==j4||j1==j2&&j5==j6||j3==j2
&&j4==j5||j5==j6&&j2==j3){
l7.setBackground(Color.YELLOW);
l7.setText("一等奖");
}else{
l7.setBackground(Color.lightGray);
l7.setText("未中奖，加油！");
}
}
});
l4.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEventarg0){
//TODOAuto-generatedmethodstub
intj1=(int)(Math.random()*10)%6;
l1.setText(num2[j1]);
intj2=(int)(Math.random()*10)%6;
l2.setText(num2[j2]);
intj3=(int)(Math.random()*10)%6;
l3.setText(num2[j3]);
intj4=(int)(Math.random()*10)%6;
l4.setText(num2[j4]);
intj5=(int)(Math.random()*10)%6;
l5.setText(num2[j5]);
intj6=(int)(Math.random()*10)%6;
l6.setText(num2[j6]);
if(j1==j2&&j2==j3||j4==j5&&j5==j6||j1==1
&&j2==2&&j3==3&&j4==4&&j5==5&&j6==6
||j1==6&&j2==5&&j3==4&&j4==3&&j5==2
&&j6==1){
l7.setBackground(Color.red);
l7.setText("特等奖");
}elseif(j1>j2&&j2>j3||j3>j2&&j2>j1||j4>j5
&&j5>j6||j6>j5&&j5>j4||j1==j2
&&j5==j4||j1==j2&&j5==j6||j3==j2
&&j4==j5||j5==j6&&j2==j3){
l7.setBackground(Color.YELLOW);
l7.setText("一等奖");
}else{
l7.setBackground(Color.lightGray);
l7.setText("未中奖，加油！");
}
}
});
l3.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEventarg0){
//TODOAuto-generatedmethodstub
intj1=(int)(Math.random()*10)%6;
l1.setText(num2[j1]);
intj2=(int)(Math.random()*10)%6;
l2.setText(num2[j2]);
intj3=(int)(Math.random()*10)%6;
l3.setText(num2[j3]);
intj4=(int)(Math.random()*10)%6;
l4.setText(num2[j4]);
intj5=(int)(Math.random()*10)%6;
l5.setText(num2[j5]);
intj6=(int)(Math.random()*10)%6;
l6.setText(num2[j6]);
if(j1==j2&&j2==j3||j4==j5&&j5==j6||j1==1
&&j2==2&&j3==3&&j4==4&&j5==5&&j6==6
||j1==6&&j2==5&&j3==4&&j4==3&&j5==2
&&j6==1){
l7.setBackground(Color.red);
l7.setText("特等奖");
}elseif(j1>j2&&j2>j3||j3>j2&&j2>j1||j4>j5
&&j5>j6||j6>j5&&j5>j4||j1==j2
&&j5==j4||j1==j2&&j5==j6||j3==j2
&&j4==j5||j5==j6&&j2==j3){
l7.setBackground(Color.YELLOW);
l7.setText("一等奖");
}else{
l7.setBackground(Color.lightGray);
l7.setText("未中奖，加油！");
}
}
});
l2.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEventarg0){
//TODOAuto-generatedmethodstub
intj1=(int)(Math.random()*10)%6;
l1.setText(num2[j1]);
intj2=(int)(Math.random()*10)%6;
l2.setText(num2[j2]);
intj3=(int)(Math.random()*10)%6;
l3.setText(num2[j3]);
intj4=(int)(Math.random()*10)%6;
l4.setText(num2[j4]);
intj5=(int)(Math.random()*10)%6;
l5.setText(num2[j5]);
intj6=(int)(Math.random()*10)%6;
l6.setText(num2[j6]);
if(j1==j2&&j2==j3||j4==j5&&j5==j6||j1==1
&&j2==2&&j3==3&&j4==4&&j5==5&&j6==6
||j1==6&&j2==5&&j3==4&&j4==3&&j5==2
&&j6==1){
l7.setBackground(Color.red);
l7.setText("特等奖");
}elseif(j1>j2&&j2>j3||j3>j2&&j2>j1||j4>j5
&&j5>j6||j6>j5&&j5>j4||j1==j2
&&j5==j4||j1==j2&&j5==j6||j3==j2
&&j4==j5||j5==j6&&j2==j3){
l7.setBackground(Color.YELLOW);
l7.setText("一等奖");
}else{
l7.setBackground(Color.lightGray);
l7.setText("未中奖，加油！");
}
}
});
l1.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEventarg0){
//TODOAuto-generatedmethodstub
intj1=(int)(Math.random()*10)%6;
l1.setText(num2[j1]);
intj2=(int)(Math.random()*10)%6;
l2.setText(num2[j2]);
intj3=(int)(Math.random()*10)%6;
l3.setText(num2[j3]);
intj4=(int)(Math.random()*10)%6;
l4.setText(num2[j4]);
intj5=(int)(Math.random()*10)%6;
l5.setText(num2[j5]);
intj6=(int)(Math.random()*10)%6;
l6.setText(num2[j6]);
if(j1==j2&&j2==j3||j4==j5&&j5==j6||j1==1
&&j2==2&&j3==3&&j4==4&&j5==5&&j6==6
||j1==6&&j2==5&&j3==4&&j4==3&&j5==2
&&j6==1){
l7.setBackground(Color.red);
l7.setText("特等奖");
}elseif(j1>j2&&j2>j3||j3>j2&&j2>j1||j4>j5
&&j5>j6||j6>j5&&j5>j4||j1==j2
&&j5==j4||j1==j2&&j5==j6||j3==j2
&&j4==j5||j5==j6&&j2==j3){
l7.setBackground(Color.YELLOW);
l7.setText("一等奖");
}else{
l7.setBackground(Color.lightGray);
l7.setText("未中奖，加油！");
}
}
});
Fontfont=newFont("",Font.BOLD,20);
l1.setFont(font);
l2.setFont(font);
l3.setFont(font);
l4.setFont(font);
l5.setFont(font);
l6.setFont(font);
l7.setFont(font);
l8.setFont(font);
l9.setFont(font);
add(l1);
add(l2);
add(l3);
add(l4);
add(l5);
add(l6);
add(l7);
add(l8);
add(l9);
}
publicstaticvoidmain(String[]args){
//TODOAuto-generatedmethodstub
frame=new抽奖游戏();
frame.setTitle("抽奖大战");
frame.setSize(500,500);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
Ⅲ 能帮忙用java做一个抽奖程序吗，就是简单的一，二，三等奖，特等奖。谢谢
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 = 1; j <= 7;j++)
{
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);
}
}
Ⅳ 抽奖程序 用JAVA做 求代码
这里是提问和回答用的。写的时候遇到什么困难可以问的。用随机数，抽中一个就不要再次抽中同样的号码，就可以了。
Ⅳ 用java做一个抽奖的代码
要在cmd下运行啊 我想你安装JDK没？
import java.util.*;
class Test{
private int maxSize=0;
private int selectSize=0;
private List<Integer> list=new ArrayList<Integer>();
private int[] one=new int[7];
public Test(int maxSize,int selectSize){
this.maxSize=maxSize;
this.selectSize=selectSize;
one=new int[selectSize];
for(int i=1;i<=maxSize;i++)
list.add(Integer.valueOf(i));
}
public void open(){
List<Integer> temp=new ArrayList<Integer>();
temp.addAll(list);
int[] p=new int[selectSize];
int tag=0;
for(int i=0;i<selectSize;i++){
tag=(int)(Math.random()*555555%temp.size());
p[i]=(Integer)temp.get(tag).intValue();
temp.remove(tag);
}
one=p;
}
public void paixu(){
int temp=0;
for(int i=0;i<selectSize;i++){
for(int j=0;j<selectSize-1;j++){
if(one[j]>one[j+1]) {temp=one[j];one[j]=one[j+1];one[j+1]=temp;}
}
}
}
public void printOpen(){
open();
paixu();
for(int i=0;i<one.length;i++)
System.out.print(one[i]+" ");
System.out.println();
}
static public void main(String[] str){
Test t=new Test(33,6); //彩票类型：33选6
for(int i=0;i<10;i++) //开10次奖
t.printOpen();
}
}
Ⅵ 用java写一个抽奖程序
这一百个随机数给个范围 random(范围),再分批获取呗 ,获取到的数判断在list里存在不,存在就重新获取,不存在就添加到list中去
Ⅶ java抽奖程序
我给你个比较简单的，，但是需要按照你的要求进行稍微的修改。。然后在main方法中去执行就可以了：
public class GoodLuck {
int custNo;
int i=1;
String answer;
String awardName;
public void LuckNo(){
Scanner input=new Scanner(System.in);
System.out.println("\n我行我素购物管理系统 > 幸运抽奖\n");
do{
// 需要的话请把随机数调整成你想要的范围（我这个是为了测试方便写的1
（～3的随机数，根据你的需要把下面的3换成你想要的数字就行了）
int num=(int)(Math.random()*3+1);
System.out.print("请输入会员卡号(4位整数)：");
custNo=input.nextInt();
//百位数与随机数相同的为幸运者
int =custNo/100%10;
while(i==1){
if(custNo>=1000&&custNo<=9999){
break;
}
else{
System.out.println("\n会员号码输入有误，请重新输入：");
custNo=input.nextInt();
continue;
}
}
if(==num){
showAward();
System.out.print("\n卡号："+custNo+"是幸运客户，获得"+awardName);
}else{
System.out.print("\n卡号："+custNo+"\t谢谢您的支持！");
}
System.out.println("\n是否继续(y/n)");
answer=input.next();
while(i==1){
if(answer.equals("y")||answer.equals("n")){
break;
}else{
System.out.print("输入有误！请重新输入：");
answer=input.next();
continue;
}
}
}while(!answer.equals("n"));
}
public void showAward(){
int num=(int)(Math.random()*3+1);
if(num==1){
awardName="Mp3";
}
else if(num==2){
awardName="美的微波炉";
}
else{
awardName="美的电饭锅";
}
}
Ⅷ java抽奖程序,可设置不同奖品获得概率
importjava.awt.EventQueue;
importjava.awt.TextArea;
importjava.awt.TextField;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;
importjava.util.Random;
importjavax.swing.JButton;
importjavax.swing.JFrame;
importjavax.swing.JLabel;
importjavax.swing.JPanel;
importjavax.swing.JTextArea;
importjavax.swing.JTextField;
importjavax.swing.border.EmptyBorder;
{
privateJPanelcontentPane;
privateJTextFieldtextFieldA;
privateJTextFieldtextFieldB;
privateJTextFieldtextFieldC;
privateTextFieldtextField;
;
privateJTextAreatextArea;
/**
*Launchtheapplication.
*/
publicstaticvoidmain(String[]args){
EventQueue.invokeLater(newRunnable(){
publicvoidrun(){
try{
LuckySelectframe=newLuckySelect();
frame.setVisible(true);
}catch(Exceptione){
e.printStackTrace();
}
}
});
}
/**
*Createtheframe.
*/
publicLuckySelect(){
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100,100,450,251);
contentPane=newJPanel();
contentPane.setBorder(newEmptyBorder(5,5,5,5));
contentPane.setLayout(null);
setContentPane(contentPane);
JLabellblA=newJLabel("A");
lblA.setBounds(10,128,54,15);
contentPane.add(lblA);
JLabellblB=newJLabel("B");
lblB.setBounds(124,128,54,15);
contentPane.add(lblB);
JLabellblC=newJLabel("C");
lblC.setBounds(254,128,54,15);
contentPane.add(lblC);
textFieldA=newJTextField();
textFieldA.setBounds(30,125,66,21);
contentPane.add(textFieldA);
textFieldA.setColumns(10);
textFieldB=newJTextField();
textFieldB.setColumns(10);
textFieldB.setBounds(149,125,66,21);
contentPane.add(textFieldB);
textFieldC=newJTextField();
textFieldC.setColumns(10);
textFieldC.setBounds(264,125,66,21);
contentPane.add(textFieldC);
textField=newTextField();
textField.setBounds(98,167,157,21);
contentPane.add(textField);
textField.setColumns(10);
textFieldResult=newJTextField();
textFieldResult.setBounds(280,167,66,21);
contentPane.add(textFieldResult);
textFieldResult.setColumns(10);
textFieldA.setText("10");
textFieldB.setText("10");
textFieldC.setText("10");
JButtonbutton=newJButton("u62BDu5956");
button.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
select();
}
});
button.setBounds(0,166,93,23);
contentPane.add(button);
textArea=newJTextArea();
textArea.setBounds(30,31,306,83);
contentPane.add(textArea);
}
protectedvoidselect(){
//TODOAuto-generatedmethodstub
intaNum=Integer.decode(textFieldA.getText());
intbNum=Integer.decode(textFieldB.getText());
intcNum=Integer.decode(textFieldB.getText());
Randomr=newRandom();
intrandom=r.nextInt(aNum+bNum+cNum);
if(random<=aNum){
textFieldA.setText(Integer.toString(Integer.decode(textFieldA.getText())-1));
textArea.append(Integer.toString(random)+"抽中了A ");
}elseif(random<=aNum+bNum){
textFieldB.setText(Integer.toString(Integer.decode(textFieldB.getText())-1));
textArea.append(Integer.toString(random)+"抽中了B ");
}elseif(random<=aNum+bNum+cNum){
textFieldC.setText(Integer.toString(Integer.decode(textFieldC.getText())-1));
textArea.append(Integer.toString(random)+"抽中了C ");
}
}
}
Ⅸ Java代码实现抽奖:从班级的学号中抽出一个一等奖,两个二等奖,三个三等奖
抽取问题, 重点是 同一个学号不能重复被抽取.
解决办法很多,
比如数组可以使用下标来标记,号码是否被使用,使用了就继续下一次抽取
也可以使用集合来抽取,把集合顺序打乱,然后随便抽几个就可以了
参考代码:数组法
importjava.util.Random;
publicclassTest{
publicstaticvoidmain(String[]args){
intstuNums=30;
int[]nums=newint[stuNums];//存储学号的数组
boolean[]flags=newboolean[stuNums];//标记,用于标记对应下标的学号是否已经被抽取过了
for(inti=0;i<stuNums;i++){
nums[i]=i+1;//给学号赋值
}
Randomr=newRandom();
while(true){
intindex=r.nextInt(stuNums);
if(!flags[index]){
System.out.println("A等:"+nums[index]);
flags[index]=true;//标记已经被使用过了
break;
}
}
for(inti=0;i<2;i++){
intindex=r.nextInt(stuNums);
if(!flags[index]){
System.out.println("B等:"+nums[index]);
flags[index]=true;
}else{
i--;//如果已经被抽取过了,那么i建议,再次循环
}
}
for(inti=0;i<3;i++){
intindex=r.nextInt(stuNums);
if(!flags[index]){
System.out.println("c等:"+nums[index]);
flags[index]=true;
}else{
i--;
}
}
}
}
集合法
importjava.util.ArrayList;
importjava.util.Collections;
publicclassTest2{
publicstaticvoidmain(String[]args){
intstuNums=20;
ArrayList<Integer>list=newArrayList<Integer>();
for(inti=0;i<stuNums;i++){
list.add(i+1);
}
System.out.println("有序"+list);
Collections.shuffle(list);//打乱顺序
System.out.println("乱序"+list);
System.out.println("A等"+list.get(0));
System.out.println("B等"+list.get(1));
System.out.println("B等"+list.get(2));
System.out.println("C等"+list.get(3));
System.out.println("C等"+list.get(4));
System.out.println("C等"+list.get(5));
}
}
Ⅹ 抽奖Java程序（是作业，急需
本来老早都给你弄好了,可你也不操心,一直没有给你发;现在就这样,需要改的话,说一下
/**
* 根据倒叙的字符串,获取与最后一位相同的位数
* @param string -倒叙后的字符串
* @return -后几位相同
*/
public static int getString( String string){
String string1 = string+"-";
//正则
String[] arr1 = string1.split(string1.toCharArray()[0]+"");
String string2 = string1.substring(0,arr1.length-1)+"-";
String[] arr2 = string2.split(string2.toCharArray()[0]+"");
return arr1.length==arr2.length?arr1.length-1:
getString(string.substring(0,arr1.length-1))
;
}
/**
* 后几位相同
* @param num
* @return
*/
public static int get(Integer num,Integer o){
String string = (num+o)+"";
StringBuffer buffer = new StringBuffer(string);
string = buffer.reverse().toString();//字符串倒叙
int count = getString(string);
return count==3&&o==0?3:
count==4&&o==0?2:
count==6&&o==0?1:
count==3&&o==1?31:
count==4&&o==1?21:
count==6&&o==1?11:
count==3&&o==-1?32:
count==4&&o==-1?22:
count==6&&o==-1?12: -1;
}
public static void main(String[] args) {
Map<String,String> map = new TreeMap<>();
Set<Integer> set = new HashSet<>();
set.add(402223);
set.add(402221);
set.add(401223);
set.add(401221);
set.add(222223);
set.add(222221);
int b = 0,n=30;
while (true){
int random = (int) (Math.random()*(1000000-100000) + 100000);
set.add(random);
if (set.size() == n){
break;
}
}
for (Integer key:set){
int count = get(key,0);
//最后一个数字是0或9的话就只有一个
count = count < 0&&key%10!=9?get(key,1):count;
count = count < 0&&key%10!=1?get(key,-1):count;
String str = count>0?(
count/10==0?(
count==3?"third":count==2?"second":"first"
)
:(
"adjacent"
)
):
"blank";
//"欢迎再来";
map.put("买到的号码:"+key, str);
}
System.out.println(map);
}