Applet won't display.

Question

Hi,
This is probably very simple, but I can't get this to work. I am
writing an Applet that will display two panels, the first one being a
panel to display graphics, and the other panel displaying the controls
to manipulate the graphics panel.
Derived from JApplet, my init() method has the following:
Container content=getContentPane();
display = new JPanel();
controls = new JPanel();
displayPanel = new DataDisplayPanel( this );
displayPanel.setPreferredSize(new Dimension( 840, 712 ));
displayPanel.setBackground( Color.BLACK );
display.add( displayPanel );
content.add( display );
content.add( controls );
DataDisplayPanel is just derived from JPanel, with MouseListener
interfaces overriden. I have embedded the applet tag in a webpage (the
relevant code is '<applet code="IceDisplayApplet.class" width="1000"
height="1000">
</applet>'). Now I know that init() is called, as I have a call to
initialise data before the above calls to initialise
the gui are called, and the data init process works just fine.
But when I try and display the applet using appletviewer, I get
nothing at all. Can anyone suggest why?
One thing I do think of was that I have written all my class
declarations in one file, and when I run the compiler,
these of course get split into different files, Class1.class,
Class2.class etc. I have combined these classes into
a jar file and added this is an archive tag in the above applet code
snippet but it still doesn't work. What am I doing wrong? Someone on
another forum suggested to another poster that a .pack() call was
missing, but I have run JApplets without this call, and they work just
fine.
Best wishes
Paul

Answer 1

Have you set the preferred size of the two JPanels, something like
display.setPreferredSize(new Dimension(x, y));
controls.setPreferredSize(new Dimension(x, y));
content.add( display );
content.add( controls );