16.24

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Test_16_24 extends JFrame{
    JPanel butJP= new JPanel();
    StillClock clock = new StillClock();
    JButton jb1 = new JButton("start");
    JButton jb2 = new JButton("stop");
    Timer timer = new Timer(1000,new ActionListener(){
        @Override
        public void actionPerformed(ActionEvent e) {
            // TODO Auto-generated method stub
            clock.setCurrentTime();
            clock.repaint();
        }        
    });
    
    public Test_16_24(){        
        butJP.add(jb1);
        butJP.add(jb2);
        add(butJP,BorderLayout.SOUTH);
        add(clock,BorderLayout.CENTER);
        //start event listener
        jb1.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent arg0) {
                // TODO Auto-generated method stub                
                timer.start();
            }
            
        });
        //stop event listener
        jb2.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent arg0) {
                // TODO Auto-generated method stub
                timer.stop();
            }
            
        });
        
    }
    
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        JFrame frame = new Test_16_24();
        frame.setTitle("Test_16_24");
        frame.setSize(300, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

}