package com.file;
import java.awt.BorderLayout;
import java.awt.event.*;
import javax.swing.*;
public class Dian1 implements Runnable{
JFrame jf = new JFrame("===");
JButton start1=new JButton("开始");
JButton stop1=new JButton("停止");
JPanel jp1=new JPanel();
JPanel jp2=new JPanel();
JLabel jl=new JLabel("欢迎到来第一次动画点名",JLabel.CENTER);//设置jl居中
String[] students = { "东方 ", "乾坤", "俊", "小飞", "程", "梦梦", "军伟", "微",
"雄", "晨旭", "哲", "贻伟", "晓帆", "朗", "岳民", "佳", "捧", "智成",
"清福", "宗博", "郭 毅", "航", "亚飞", "凯", "博义", "瑜", "锐",
" 海峰", "勇", "山", "小文", "猛", "红科" };
//使用Random随机出数
public int getStudentIndex(){
int totalStudentNum = students.length;
int selectIndex = (int)(Math.random()*totalStudentNum);
return selectIndex;
}
Boolean go=true;
Thread rollThread =null;
public Dian1(){
jf.setLayout(new BorderLayout());
jf.setVisible(true);
jf.setSize(240,300);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.add(jp2,BorderLayout.SOUTH);
jp2.add(start1);
jp2.add(stop1);
jf.add(jl);
start1.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
String string =e.getActionCommand();
if(string.equals("开始")){
start();
}
}
});
stop1.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
String string =e.getActionCommand();
if(string.equals("停止")){
go=!go;
}
}
});
}
public void start(){
if(null == rollThread){
rollThread = new Thread(this);
rollThread.start();
}
}
public void run()
{
while(true)
{
if(go){
int stuNum = getStudentIndex();
jl.setText(students[stuNum]+ "");
}
try
{
Thread.sleep(20);
}catch(Exception e){}
}
}
public static void main(String[] args) {
new Dian1();
}
}
