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Tip of the Day
Language: AWT
Expertise: Beginner
Mar 21, 1997

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repaint() and Consecutive Lines

Question:
My applet draws lines. I click at the place where I want my line to start and then I click at the end of it. It draws a line from one point to the other. How do I use repaint() so that when I draw the second line my first line does not disappear?

Answer:
Calling repaint() calls update(g) which first erases your graphics context, then calls paint(g). Try redefining update so it doesn't erase the graphics context:

public void update(Graphics g) {
           paint(g);
    } 
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