JApplets, can't seem to draw anything

[colin shuker]

Hi, this post kind of follows on from my last.
I've been advised to use JApplets to avoid the screen flashing
problem when repaint() is called.

I've written a very short JApplet (below), and I'm trying to get it to
draw a line, but its not working. I've been messing around with it for
a couple of hours now, and I can't see why it won't draw.
Also, usually when I extend the JPanel class in an application, I would
override paintComponent(Graphics g), and in this implementation, I would
make the call super.paintComponent(g), however this doesn't seem to
compile in this JApplet.

I'd be very grateful if someone could explain why this applet isn't drawing
the line like its supposed to. Thanks

import java.awt.*;
import java.awt.event.*;
import java.awt.Color;
import java.awt.image.*;
import javax.swing.*;
 

public class jap extends javax.swing.JApplet
{
    public static JPanel lowerPanel=new JPanel();
    public static Button orig=new Button("Original");
    public static Button resize=new Button("Resize");
    public static Button back=new Button("Back");
    public static Button iter=new Button("Iterations");
    
    public void init()
    {
       lowerPanel.setLayout(new GridLayout(1,4));
       lowerPanel.add(orig);
       lowerPanel.add(resize);
       lowerPanel.add(back);
       lowerPanel.add(iter);
       
       Container content = getContentPane();
       content.setLayout(new BorderLayout());
       content.add(lowerPanel,BorderLayout.SOUTH);
      
    }
    public void start()
    {
        System.out.println("Start Method Called");
        repaint();
      
    }
     protected void paintComponent(Graphics g)
    {
        //super.paintComponent(g);     <--- doesn't work like usually does
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        g2.drawLine(50,50,200,200);
     }
}
 

[colin shuker]

I've placed a System.out.println("...") statement inside the
paintComponent(Graphics g) method, and this clearly shows that
paintComponent is being invoked when repaint() is called.
So I'm not sure, I'm gonna have a look at some JApplet info from sun, and
see if I can figure it out.

Thanks again for any help.

[colin shuker]

OK, I've kind of figured it out.
I still need to extend JPanel in order to use paintComponent(...)
So I've created an inner class within the JApplet to do the drawing.
I knew inner classes would come back to haunt me at some point.
Maybe I could write this class separatley, but I'm not sure if this
will work with geocities.com (free web site creator). I'm currently just
uploading the one applet class file, and I'm not totally sure if I can upload 2 class files and it will work.
I'll let you know if I get stuck, thanks