Painting in AWT and Swing

In a graphical system, a windowing toolkit is usually responsible for providing a framework to make it relatively painless for a graphical user interface (GUI) to render the right bits to the screen at the right time.

Both the AWT (abstract windowing toolkit) and Swing provide such a framework. But the APIs that implement it are not well understood by some developers -- a problem that has led to programs not performing as well as they could.

This article explains the AWT and Swing paint mechanisms in detail. Its purpose is to help developers write correct and efficient GUI painting code. While the article covers the general paint mechanism (where and when to render), it does not tell how to use Swing's graphics APIs to render a correct output

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