swing時鐘

import java.awt.*;
import java.util.*;
import javax.swing.*;
public class HyClock extends JFrame implements Runnable {
    public static JLabel tm;
    public void run() {
        while (true) {
            Calendar c = Calendar.getInstance();
            String nowtime = c.get(Calendar.HOUR_OF_DAY) + ":" + c.get(Calendar.MINUTE) + ":" + c.get(Calendar.SECOND);
            tm.setText(nowtime);
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
            }
        }
    }
 
    public static void main(String[] agrs) {
        HyClock  hytime = new HyClock();
        hytime.setLayout(new FlowLayout());
        tm = new JLabel();
        tm.setFont(new Font("宋體", 1, 40));
        tm.setForeground(Color.RED);
        hytime.add(tm);
        hytime.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        hytime.setSize(300, 100);
        hytime.setVisible(true);
        hytime.setLocation(400, 400);
        Thread t = new Thread(hytime);
        t.start();
    }
}

 

import java.awt.*;

import java.util.*;

import javax.swing.*;

public class HyClock extends JFrame implements Runnable {

     public static JLabel tm;

     public void run() {

         while ( true ) {

             Calendar c = Calendar.getInstance();

             String nowtime = c.get(Calendar.HOUR_OF_DAY) + ":" + c.get(Calendar.MINUTE) + ":" + c.get(Calendar.SECOND);

             tm.setText(nowtime);

             try {

                 Thread.sleep( 1000 );

             } catch (InterruptedException e) {

             }

         }

     }

 

     public static void main(String[] agrs) {

         HyClock  hytime = new HyClock();

         hytime.setLayout( new FlowLayout());

         tm = new JLabel();

         tm.setFont( new Font( "宋體" , 1 , 40 ));

         tm.setForeground(Color.RED);

         hytime.add(tm);

         hytime.setDefaultCloseOperation(DISPOSE_ON_CLOSE);

         hytime.setSize( 300 , 100 );

         hytime.setVisible( true );

         hytime.setLocation( 400 , 400 );

         Thread t = new Thread(hytime);

         t.start();

     }

}