I am trying to write a short code which should cover all the necessary
details :

Class A extends Japplet, MouseListener.... {

public void init() {
loadInterface();
}
private void loadInterface() {
addMouseListener(this);
addMouseMotionListener(this);
addMouseWheelListener(this);
setLayout(new BorderLayout());
tck = new Thick(...);
dc = new DrawingCanvas(...);
dc.setPreferredSize(new Dimension(this.getWidth()-50,
this.getHeight()));
dc.setMaximumSize(new Dimension(this.getWidth()-30,
this.getHeight()));
tck.setMinimumSize(new Dimension(30,this.getHeight()-80));
tck.setPreferredSize(new Dimension(50,this.getHeight()-70));
tck.setMaximumSize(new Dimension(50, this.getHeight()-60));
add(tck, BorderLayout.EAST);
add(dc, BorderLayout.CENTER);

}
}

//different file
public class DrawingCanvas extends JComponent {
/* In this class I draw a large number of polygons and lines */
}

//different file

public class Thick extends JComponent {
/* In this I draw a rectangle of a given size*/
}

It won,t be possible for me to give a self compilable code showing the
same features and which would fail, because its really hard to
replicate some of the stuff. If you could show me some way to get out
of this problem it would be of great help!!

Rohit

and Yes, I have gone through the GUI tutorials.

Rohit

Ok, I have written the code which you can compile and please tell me
why it isn't working :

/*Main.java*/

package javaapplication1;

import java.awt.BorderLayout;
import javax.swing.JApplet;
import java.awt.BorderLayout;
import java.awt.Dimension;

/**
*
* @author gupta
*/
public class Main extends JApplet{

   /** Creates a new instance of Main */
   public void init() {
       loadInterface();
   }
   private void loadInterface() {

       DrawingCanvas dc = new DrawingCanvas();
       Thick tck = new Thick();
       setLayout(new BorderLayout());
       dc.setPreferredSize(new Dimension(this.getWidth()-50,
this.getHeight()));
    dc.setMinimumSize(new Dimension(this.getWidth()-70,
this.getHeight()));
    dc.setMaximumSize(new Dimension(this.getWidth()-30,
this.getHeight()));
    tck.setMinimumSize(new Dimension(30,this.getHeight()-80));
    tck.setPreferredSize(new Dimension(50,this.getHeight()-70));
    tck.setMaximumSize(new Dimension(50, this.getHeight()-60));
       add(tck, BorderLayout.EAST);
       add(dc, BorderLayout.CENTER);
   }

   /**
    * @param args the command line arguments
    */

}

/*DrawingCanvas.java*/

package javaapplication1;

import javax.swing.JComponent;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Color;

public class DrawingCanvas extends JComponent {

   private Graphics2D g2d;
   public DrawingCanvas() {
       repaint();
   }

   public void paint (Graphics g) {
       g2d = (Graphics2D) g;
       g2d.setColor(Color.blue);
       g2d.fillRect(0,0, getWidth(), getHeight());
   }

}

/*Thick.java*/

package javaapplication1;

import javax.swing.JComponent;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Color;
import java.awt.GradientPaint;

public class Thick extends JComponent {

   private Graphics2D g2d;

   public Thick() {
       repaint();
   }

   public void paint(Graphics g) {
       Graphics2D g2d = (Graphics2D) g;
    //GradientPaint gp = new GradientPaint (0, 10, new
Color((float)1,(float)0,(float)0), 0, 50, new
Color((float)0,(float)0,(float)1));
       //g2d.setPaint(gp);
    g2d.setColor(Color.red);
    g2d.drawRect( getWidth(),50, 20, 20);
    }
}

Please help!!!

Rohit