java课程项目之幸运观众手机号码抽取器

一、      大型实验的内容

开发一个简单的幸运观众手机号码抽取程序，要求在理解Java多线程原理基础上，设定简单的抽取人数、获奖等级等参数后，能随机抽取存在文本文件中（每行放一个手机号和归属地）的若干个观众手机号码，显示时隐藏最后两位号码，并同时显示该手机号码的所属地。

二,、 系统功能具体描述为：

1、 设置获奖等级和抽奖人数

本程序默认为三等奖5人。

设置时会清空JexstField里的内容，并且会暂停抽取程序的运行，当设置人数的时候，中间可编辑的文本框也会改变。

2.开始按钮

点击时在文本框里不停的变换显示从information.txt里读取的手机号码

3、结束按钮

文本框内停止变换，显示结束时所显示的手机号码及地址

实现代码如下：

import java.awt.*;
import java.util.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class Luckymode extends JFrame implements Runnable {

JLabel jnum,jtype; //文本”设置获奖人数:“
JComboBox phonenum, prize;
JButton start, end;
int number = 4;
boolean isrun = false;
int i;
String textname="E:/information.txt";
JTextField text[] = new JTextField[10];
Vector<String> v=new Vector<String>();
Luckymode(String s) {
super(s);
initComponents();
}
public void initComponents() { //界面初始化及监听事件
Container jtogether = getContentPane();
JPanel jup = new JPanel();
jup.setLayout(new FlowLayout());
jnum = new JLabel("人数:");
jtype=new JLabel("奖项:");
String[] str = { "1", "2", "3", "4", "5", "6", "7", "8", "9", "10" };
String[] strtype={"一等奖","二等奖","三等奖"};
prize = new JComboBox(strtype);
prize.setSelectedIndex(2);
prize.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
isrun = false;
start.setEnabled(true);
end.setEnabled(false);
for (i = 0; i < 10; i++) {
text[i].setText("");
}
}
});
phonenum = new JComboBox(str);
phonenum.setSelectedIndex(4);
phonenum.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == phonenum) {
isrun = false;
start.setEnabled(true);
end.setEnabled(false);
number = phonenum.getSelectedIndex();
for (i = 0; i < 10; i++) {
text[i].setEditable(true);
text[i].setText("");
}
if (number != 10) {
for (i = number+1; i < 10; i++) {

text[i].setEditable(false);
}
}
}
}

});
jup.add(jtype);
jup.add(prize);
jup.add(jnum);
jup.add(phonenum);

JPanel jtemp=new JPanel();
jtemp.setLayout(new BorderLayout());
JPanel j1=new JPanel();
j1.add(new JLabel(" "));
JPanel j2=new JPanel();
j2.add(new JLabel(" "));
JPanel jcenter = new JPanel();
jcenter.setLayout(new GridLayout(10, 1, 20, 0));
for (i = 0; i < 10; i++) {
text[i] = new JTextField("");
text[i].setHorizontalAlignment(JTextField.CENTER );
jcenter.add(text[i]);
}
for (i = number+1; i < 10; i++) {
text[i].setEditable(false);
}
jtemp.add("Center",jcenter);
jtemp.add("West",j1);
jtemp.add("East",j2);
JPanel jdown = new JPanel();
jdown.setLayout(new FlowLayout());
start = new JButton("开始");
end = new JButton("结束");
start.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
isrun = true;
start.setEnabled(false);
end.setEnabled(true);
}
});
end.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
isrun = false;
start.setEnabled(true);
end.setEnabled(false);
}
});
end.setEnabled(false);
jdown.add(start);
jdown.add(end);
jtogether.setLayout(new BorderLayout());
jtogether.add("North", jup);
jtogether.add("Center", jtemp);
jtogether.add("South", jdown);
textinfile();
setVisible(true);
}
public String texthand(String a){//将从文件读入的数据处理
String restring,s1,s2;
s1=a.substring(11);
s2=a.substring(0,9);
restring=s2+"**"+s1;
return restring;
}
public void textinfile()
{
FileReader f; //将文件中手机号码信息读入vector
try {
f = new FileReader("E:/information.txt");
BufferedReader br = new BufferedReader(f);
String strline=br.readLine() ;
while(strline!=null){
v.add(texthand(strline));
strline=br.readLine();
}
br.close();
f.close();
}
catch (FileNotFoundException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
}
public void run() { //线程运行
int k=0;
while (true) {
if(isrun){
int m=(int) (Math.random() * 100) + 50;
try {
Thread.sleep(m);
} catch (Exception e) {
e.printStackTrace();
}
for (i = 0; i <=number; i++) {
if(k>=v.size()){k=0;}
text[i].setText(v.get(k)); //在text[i]中随机显示手机号码
k++;
}
}
}
}
public static void main(String[] args) {
Luckymode luck = new Luckymode("幸运手机号码抽取");
luck.setSize(300, 450);
luck.setLocation(800, 300);
luck.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Thread t1 = new Thread(luck);
t1.start();
Thread t2 = new Thread(luck);
t2.start();
Thread t3 = new Thread(luck);
t3.start();
}
}
出现问题：有时在同一个框中显示两条信息，所以在run()中使线程随机sleep。

int m=(int) (Math.random() * 100) + 50;
try {
Thread.sleep(m);
} catch (Exception e) {
e.printStackTrace();
}菜鸟操作，仅供参考......