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Swing draw points

17 New Member
I want to loop through an array of numbers and use those to plot points. What method should I be thinking of? I know there's one that takes an X and Y coordinate and draws points. Is there one that draws bars, too?
Nov 24 '08 #1
4 5483
11,448 Recognized Expert MVP
A bar basically is just a rectangle; a Graphics object can draw rectangles.

kind regards,

Nov 25 '08 #2
17 New Member
Ok, thanks. Can you give me a sample usage? Or is something like this correct?
Expand|Select|Wrap|Line Numbers
  1. java.awt.Panel panel = new java.awt.Panel();
  2. panel.getGraphics().drawRect(1,2,3,4);
Would something like that work?
Nov 25 '08 #3
17 New Member
Actually, now my problem is when I'm trying to draw on a Panel. When I call getGraphics() it returns null...
Nov 25 '08 #4
11,448 Recognized Expert MVP
Read Sun's Swing tutorial. The AWT event dispatch thread calls the paint() method which calls the paintComponent( ) method; that's the method you have to override (re-implement) if you want to draw your own stuff. Your approach is not going to work.

kind regards,

Nov 25 '08 #5

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