线程控制时间的随笔（实例）

 1 package kk;

 2 import java.util.*;

 3 import java.awt.EventQueue;

 4 import java.text.DecimalFormat;

 5 import java.text.SimpleDateFormat;

 6 import java.util.Scanner;

 7 import java.util.Timer;

 8 import java.util.TimerTask;

 9 

10 import javax.swing.JOptionPane;

11 

12 

13 

14 

15 public class kk {

16     float sum;

17     String parten = "0.00";//为下一行代码初始化准备

18     DecimalFormat decimal = new DecimalFormat(parten);//创建一个类型为DecimalFormat类的对象decimal

19     String str;

20     static Timer timer = null; 

21     static SimpleDateFormat df=new SimpleDateFormat("mm:ss"); //控制时间的格式类   

22     long starttime;

23     long finishtime;

24     long duration;

25     long allduration;

26     public kk()

27     {

28          timer = new Timer(); 

29          finishtime=System.currentTimeMillis();

30          starttime=finishtime;

31          timer.schedule(new TimerTask() 

32          {

33              public void run() {    

34                  finishtime=System.currentTimeMillis();

35                  duration=finishtime-starttime;

36                 /* if(duration/1000==25&&summary<tishu)

37                  {

38                      JOptionPane.showMessageDialog(null, "答题时间已到。答题总题数为"+(dadui+dacuo)+",答对题数为"+dadui+",答错题数为"+dacuo+",未答题题数为"+(tishu-dadui-dacuo)+",答题使用时间:"+(allduration+duration)/1000+"秒。");

39                      frame.setVisible(false);

40                      new 每天一练初级版题型选择();

41                  }

42                  String str=df.format(new Date(duration)); 

43                  T7.setText(str);*/

44                  String str=df.format(new Date(duration)); 

45                  System.out.print(str);

46                  }  

47              }, 1000, 1000);

48     }

49     public static void main(String[] args) {

50         EventQueue.invokeLater(new Runnable() {

51             public void run() {

52                 try {

53                     kk window = new kk();

54                     Scanner qq=new Scanner(System.in);                 

55                 } catch (Exception e) {

56                     e.printStackTrace();

57                 }

58             }

59         });

60     }

61 }

线程控制时间