java多线程制作计时器

基本思路：

在类中创建thread 供按钮监听器调用。

 

 

界面设计：

 

代码：

 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         try

22         {

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 }

View Code