GetWidth() not a positive number?

Question

I'm adding a circle to a jpanel and am trying to determine the panel's size to make sure the circle is within the panel:
<code>
int width,height;
width = getWidth();
height = getHeight();
Random startPoint;
startPoint = new Random();
coordX=startPoint.nextInt(width); <<
coordY=startPoint.nextInt(height); <<
g.fillOval(coordX,coordY,sizeX,sizeY);
</code>
This passes compile bu generates an IllegalArgumentException: n must be positive on at the marked lines. What am I doing wrong?
Thanks
MVP

Answer 1

I caught the exception and printed out the width height values - they're 0.
Q: a panel set into the center of a borderlayout has a size, right?
getContentPane().add(pnlPlaypen,BorderLayout.CENTER);
In the PlayPanel class:
<code>
     public PlayPanel()
          setBackground(Color.BLACK);
          clrCurrent=Color.blue;
          startPoint = new Random();
          sizeX=20;
          sizeY=20;
          width = getWidth();
          height = getHeight();
</code>
Doesn't the panel get generated with the size to fill center?
Confused,
MVP