跪求带秒表功能的时钟代码，急！

Question

问一下楼主，要不要图形界面？
旨在dos窗口下以数字的形势显示可以不？

Answer 1

package info.bioz.test;import javax.swing.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.*;
import java.util.Date;
import java.text.SimpleDateFormat;/**
 * <p>File: StopWatch.java</p>
 * <p>Description: </p>
 * <p><a href="http://www.bioz.info/">BIOZ.info</a> Copyright (c) 2004</p>
 *
 * @author <a href="mailto:[email protected]">Chance</a>
 */
public class StopWatch extends JFrame {
    JButton btnStart,btnStop;
    JLabel label;
    Timer timer;
    public StopWatch() {
        label=new JLabel("00:00:00.000");
        btnStart=new JButton("start");
        btnStop=new JButton("stop");
        final int delay=100;
        final Date startTime=new Date();
        final SimpleDateFormat sdf=new SimpleDateFormat("HH:mm:ss.S");
  final Action taskPerformer = new AbstractAction() {
      public void actionPerformed(ActionEvent evt) {
          //显示时间
          Date d=new Date(System.currentTimeMillis()-startTime.getTime()-28800000);
              label.setText(sdf.format(d));
              label.repaint();
      }
  };
        btnStart.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent evt) {
                startTime.setTime(new Date().getTime());
                timer=new Timer(delay, taskPerformer);
                timer.start();
             }
        });
        btnStop.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent evt) {
                if(timer!=null&&timer.isRunning())
                    timer.stop();
             }
        });        Container c=getContentPane();
        c.add(label,BorderLayout.NORTH);
        c.add(btnStart,BorderLayout.CENTER);
        c.add(btnStop,BorderLayout.SOUTH);
    }
    public static void main(String[] args) {        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });    }    private static void createAndShowGUI() {
        StopWatch window=new StopWatch();
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.pack();
        window.setVisible(true);
    }
}

Answer 2

J2SDK文件夹中的DEMO文件夹中有example