16.17

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

public class Test_16_17 extends JFrame{
    
    public Test_16_17(){
        add(new JP());
    }
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Test_16_17 frame = new Test_16_17();        
        frame.setSize(300,220);
        frame.setTitle("Test_16_16");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null); // Center the frame
        frame.setVisible(true); 
    }
    
    static class JP extends JPanel{
        private int x = 0 , y = 20;
        private String str;
        public JP(){
            addMouseListener(new MouseAdapter(){
                public void mousePressed(MouseEvent e){
                    str = "good";
                }
                public void mouseReleased(MouseEvent e){
                    str = "";
                }
            });
            Timer timer = new Timer(1000,new TimerListener());
            timer.start();
        }
        protected void paintComponent(Graphics g){
            
            if(x > getWidth()) x = 0;
            x += 5;
            if(str != "good")
            {super.paintComponent(g); g.drawString("this place",x,y); }
        }
        class TimerListener implements ActionListener{

            @Override
            public void actionPerformed(ActionEvent arg0) {
                // TODO Auto-generated method stub                
                repaint();
            }
            
        }
    }
}