title: MouseListener Help Java
body: <p>I am trying to write a program in Java Swing that outputs a 10 x 10 grid of geometric rectangles filled with randoms colors. However, when the user clicks on one of the rectangles within the display window the rectangle should repaint() and change to another color. </p>
  
  <p>Thus far I have the rudimentary program running, but I can't figure out how to implement a mouseListener to it in order to have the rectangles' color change when a user clicks inside. At this point, the rectangles only repaint when the display window is expanded and minimized. Any advice/help would be greatly appreciated! Thanks!</p>
  
  <p>Here is what I have so far...</p>
  
  <pre><code>   import java.awt.*;
     import javax.swing.*;
     import java.awt.event.*;
     import java.awt.geom.*;
  
  
  public class ColorGrid extends JPanel {
     int w, x, y, z;
     Color c = new Color((int)(Math.random() * 0xFFFFFF));
     public void paint(Graphics g){
     Graphics2D g2 = (Graphics2D) g;
  
     setLayout(new GridLayout(10,10));
  
     int w = x = y = z = 0;
     for(int i=0;i&lt;100;i++){
     Color c = new Color((int)(Math.random() * 0xFFFFFF));
     w+=10;
     x+=10;
     y+=50;
     z+=15; 
  
            g2.drawRect(w+10,x+30,y,z);
            g2.drawRect(w+10,x+30,y,z);               
            g2.fillRect(w+10,x+30,y,z);
            g2.setPaint(c);  
          } 
     }
  
     public static void main(String[] args) {
        JFrame f= new JFrame();
        f.setTitle("ColorGrid Display Window");
        f.setSize(200,200);
        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
            System.exit(0);
            }
      });
      Container contentPane = f.getContentPane();
      contentPane.add(new ColorGrid());
      f.show();
      }
  }
  </code></pre>