showtime.java~1~

管理系统

package com.aptech.cdjj.sex.gui;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.text.*;
import java.util.*;
public class ShowTime extends JFrame implements Runnable
{
 static JFrame jf;
 JLabel jl;
 public ShowTime()
 {
  jf=new JFrame("时间显示");
  jl=new JLabel();
  jf.getContentPane().add(jl);
  jf.setSize(200,100);
 }

 public void run()
 {
  while(true)
  {
   SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
   jl.setText(sdf.format(new Date()));
   try
   {
    Thread.sleep(1000);
   }
   catch(Exception e)
   {
    jl.setText("出错错误，请重启程序");
   }
  }
 }
 public static void main(String arg[])
 {
  ShowTime t=new ShowTime();
  Thread thread1=new Thread(t);
  thread1.start();
  jf.setVisible(true);
 }
}