clocklabel.java

来自「简单的图书馆管理程序. 借书还书功能..以及查询功能」· Java 代码 · 共 41 行

package packcat;

import java.awt.*;
import javax.swing.JLabel;
import java.util.*;
import java.text.*;

  public class Clocklabel extends JLabel implements Runnable{
  private Thread clockthread=null;
      public Clocklabel()
     {
      if(clockthread==null)
         {
           clockthread=new Thread(this,"clock");
           clockthread.start();
          }

      }
       public void run()
        {
          while(true)
            {
              Calendar cal=Calendar.getInstance();
              Date date=cal.getTime();
              DateFormat dateformatter=DateFormat.getTimeInstance();
              this.setText(dateformatter.format(date));
              try{
                  Thread.sleep(1000);
                 }
              catch(Exception e){}
            }

         }
  public Thread getClockthread() {
    return clockthread;
  }


}