paintComponent : Java Glossary

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paintComponent
not to be confused with Container.paintComponents. In Swing, you override the paintComponent method of your JComponent, usually a JPanel, rather than the paint method of a Canvas as you do in AWT (Advanced Windowing Toolkit). Here is some sample code to make a simple drawing, and save it as a *.png image file.

Learning More

Oracle’s Product Info on how painting works in AWT and Swing
AWT
Canvas
Graphics object
JPanel
Marty Hall’s drawing tutorial
opaque
paint
Painter’s API
setBackground
Sun’s painting tutorial
Swing
transparent
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