1 package thread; 2  3 import java.awt.*; 4 import java.awt.event.*; 5  6 import javax.swing.*; 7  8 public class Threadtest extends JFrame implements Runnable{ 9     JFrame frm=new JFrame("watch");10     JPanel bottom=new JPanel();11     JPanel mid=new JPanel();12     JLabel h=new JLabel("0");13     JLabel biao=new JLabel(":");14     JLabel s=new JLabel("00");15     JButton hajime=new JButton("开始计时");16     JButton pause=new JButton("暂停");17     JButton tozero=new JButton("清零");18     Thread t=new Thread(this);    19     private int i=0,j=0;20     public void run(){21         try22         {23             while(true){24             Thread.sleep(100);25             i++;26             if(i>=1&&i<10)27             {28                 s.setText("0"+i);29             }30             else if(i>=10&&i<60)31                 s.setText(""+i);32             if(i==60)33             {34                 i=0;35                 j++;36                 s.setText("00");37                 h.setText(""+j);38             }39             }40         }catch(Exception e){41             System.out.println("");42         }43     }44     public Threadtest()45     {46         frm.setLayout(new BorderLayout());47         frm.setBounds(200, 200, 300, 150);48         frm.setVisible(true);49         frm.add("South",bottom);50         frm.add("Center",mid);51         52         mid.add(h);53         mid.add(biao);54         mid.add(s);55         h.setFont(new Font("Consulas",Font.PLAIN,36));56         biao.setFont(new Font("Consulas",Font.PLAIN,36));57         s.setFont(new Font("Consulas",Font.PLAIN,36));58         bottom.add(hajime);59         bottom.add(pause);60         bottom.add(tozero);61         62         63         hajime.addActionListener(new ActionListener(){64             public void actionPerformed(ActionEvent e){65                 if(t.isAlive())66                     t.resume();67                 else t.start();68             }});69         pause.addActionListener(new ActionListener(){70             public void actionPerformed(ActionEvent e){71                     t.suspend();72             }});73         tozero.addActionListener(new ActionListener(){74             public void actionPerformed(ActionEvent e){75                 h.setText("0");76                 s.setText("00");77                 i=0;78                 j=0;79             }80         });81     }82     83     public static void main(String[] args){84         new Threadtest();85     }86 }