Java实现的简单数字时钟功能示例

import javax.swing.jframe;

import javax.swing.jpanel;

import java.awt.borderlayout;

import javax.swing.jlabel;

import java.awt.font;

import java.text.simpledateformat;

import java.util.date;

public class time extends jframe implements runnable{

   /**

    *

    */

   private static final long serialversionuid = 1l;

   private jlabel date;

   private jlabel time;

   public time() {

     //初始化图形界面

     this .setvisible( true );

     this .settitle( "数字时钟" );

     this .setsize( 282 , 176 );

     this .setlocation( 200 , 200 );

     this .setresizable( true );

     jpanel panel = new jpanel();

     getcontentpane().add(panel, borderlayout.center);

     panel.setlayout( null );

     //时间

     time = new jlabel();

     time.setbounds( 31 , 54 , 196 , 59 );

     time.setfont( new font( "arial" , font.plain, 50 ));

     panel.add(time);

     //日期

     date = new jlabel();

     date.setfont( new font( "微软雅黑" , font.plain, 13 ));

     date.setbounds( 47 , 10 , 180 , 22 );

     panel.add(date);

   }

   //用一个线程来更新时间

      public void run() {

      while ( true ){

      try {

        date.settext( new simpledateformat( "yyyy 年 mm 月 dd 日  eeee" ).format( new date()));

        time.settext( new simpledateformat( "hh:mm:ss" ).format( new date()));

      } catch (throwable t){

      t.printstacktrace();

      }

      }

   }

   public static void main(string[] args) {

     new thread( new time()).start();

   }

}