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POUsing addMouseListener() and paintComponent() for JPanel
 

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    <p>This is a follow-up to my <a href="https://stackoverflow.com/questions/12175174/paintcomponent-vs-paint-and-jpanel-vs-canvas-in-a-paintbrush-type-gui">previous</a> question. I've simplified things as much as I could, and it still doesn't work! Although the good thing I got around using <code>getGraphics()</code>. </p> <p>A detailed explanation on what goes wrong here is massively appreciated. My suspicion is that something's wrong with the the way I used <code>addMouseListener()</code> method here. </p> <p>EDIT completely rewrote the code. Still does not work properly though. </p> <pre><code>import java.awt.Color; import java.awt.Graphics; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.awt.event.MouseMotionListener; import javax.swing.JFrame; import javax.swing.JPanel; public class RunClass{ static MainClass1 inst1 = new MainClass1(); public static void main(String args[]){ JFrame frame1 = new JFrame(); frame1.add(inst1); frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame1.setTitle("NewPaintToolbox"); frame1.setSize(200, 200); frame1.setLocationRelativeTo(null); frame1.setVisible(true); } } class MainClass1 extends JPanel implements MouseListener, MouseMotionListener{ int xvar=30; int yvar=30; //static PaintClass22 inst1 = new PaintClass22(); @Override public void mouseClicked(MouseEvent arg0) { // TODO Auto-generated method stub xvar = arg0.getX(); yvar = arg0.getY(); repaint(xvar,yvar,10,10); } @Override public void mouseEntered(MouseEvent arg0) { // TODO Auto-generated method stub } @Override public void mouseExited(MouseEvent arg0) { // TODO Auto-generated method stub } @Override public void mousePressed(MouseEvent arg0) { // TODO Auto-generated method stub } @Override public void mouseReleased(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseDragged(MouseEvent arg0) { // TODO Auto-generated method stub xvar = arg0.getX(); yvar = arg0.getY(); repaint(xvar,yvar,10,10); } @Override public void mouseMoved(MouseEvent arg0) { // TODO Auto-generated method stub } @Override public void paintComponent(Graphics g){ super.paintComponent(g); g.setColor(Color.RED); g.fillRect(xvar, yvar, 10, 10); } } </code></pre>
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