Panel

Question

Could someone please tell whats going wrong in the following code. I realise that I never specified the size of the panel, but I dont know where I am supposed to do that. Please help me out.
The values of "x" that prints out on mouse press and realease is "0". And the frame that comes up is very small.
import java.applet.*;
import java.lang.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
import java.awt.geom.*;            
public class Panel extends JPanel{
    public ArrayList lines = new ArrayList();
    public Panel() {
     addMouseListener(new LineListner());
    class LineListner extends MouseAdapter{
     private Point2D.Double point = null;
     public void mousePressed(MouseEvent event)
         point = new Point2D.Double(getX(), getY());
         //System.out.println(getX());
     public void mouseReleased(MouseEvent event)
         //System.out.println("&"+getX());
         if (point != null){
          Point2D.Double point2 = new Point2D.Double(getX(),getY());
          lines.add((Object)(new Line2D.Double(point, point2)));
          repaint();
     public void paint(Graphics g)
         Graphics2D g1 = (Graphics2D)g;
         for(int i = 0; i<lines.size(); i++){
          g1.draw((Shape)(lines.get(i)));
    public static void main(String[] args) {
     JFrame frame = new JFrame();
     Panel panel = new Panel();
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     frame.setContentPane(panel);
     frame.pack();
     frame.show();
} // Panel

Answer 1

I recommend changing paint(Graphics g) to paintComponent(Graphics g)See this article, especially this section.
cheers
lutha