Swing draw points

[KiddoGuy]

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?

[JosAH]

@KiddoGuy
A bar basically is just a rectangle; a Graphics object can draw rectangles.

kind regards,

Jos

[KiddoGuy]

Ok, thanks. Can you give me a sample usage? Or is something like this correct?

java.awt.Panel panel = new java.awt.Panel();
panel.getGraphics().drawRect(1,2,3,4);
 

Would something like that work?

[KiddoGuy]

Actually, now my problem is when I'm trying to draw on a Panel. When I call getGraphics() it returns null...

[JosAH]

@KiddoGuy
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,

Jos