demotimer.java

容 一个多线程演示时钟的例子 代码分类 APPLICATION 很不错

import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class DemoTimer extends JFrame implements ActionListener,Runnable{
	JLabel j1;
	JTextField jt1;
	JButton jb1,jb2;
	JPanel jp1,jp2;
	
	Thread t;
	public DemoTimer(){
		Container con=getContentPane();
		con.setLayout(new GridLayout(2,1));
		j1=new JLabel("现在北京时间");
		jt1=new JTextField(25);	
		jb1=new JButton("开始");
		jb2=new JButton("结束");
		jp1=new JPanel();
		jp2=new JPanel();
		jp1.add(j1);
		jp1.add(jt1);
		jp2.add(jb1);
		jp2.add(jb2);
		con.add(jp1);
		con.add(jp2);
		
		jb1.addActionListener(this);
		jb2.addActionListener(this);
	}
	public void run(){
			System.out.println("进入 run()方法");
			int i=0;
			while(true){
				System.out.println("第"+i+"次");
				i=i+1;
				try{
					
					System.out.println("第"+i+"次开始进入睡眠");
					t.sleep(1000);
					jt1.setText(""+new Date().toString());	
				}
				catch(Exception e)
				{
					e.printStackTrace();
				}
				System.out.println("第"+i+"次开始睡眠之后");
			}
	}
	
	public static void main(String[] args){
		DemoTimer dt=new DemoTimer();
		dt.setSize(420,230);
		dt.setVisible(true);
		System.out.println("aaa"+args[0]);
		for(int i=0;i<args.length;i++){
			System.out.println(""+i);	
		}	
	}
	
	public void actionPerformed(ActionEvent e){
		if(e.getSource().equals(jb1)){
			t=new Thread(this);
			t.start();
		}
		if(e.getSource().equals(jb2)){
			t.stop();	
		}
	}
}