The difference between paint () and paintcomponent () in swing

Excerpt from the Internet.

1- Paint() call Paintcomponent (), Paintborder (), Paintchildren ()

2-The most important difference is "double buffering". Swing component of the paint() to achieve double buffering, so do not go to overwrite, will break the double buffering, ———— suggested way is to overwrite paintcomponent (), many people do the small program will "blink", It is because they overwrite the paint() method, which destroys the double buffering of Swing itself. Swing does not recommend that users implement double buffering themselves.

3-Overwrite paint(), if the new method does not call Paintchildren (), but also cause the child control does not display, the mouse moved up to display, this is also a lot of novice asked questions: "Why my button only mouse up to display?" ”

4-Only a very small number of cases may need to overwrite the paint() method, usually to achieve special drawing effects, or special optimizations such as JViewport overwrite the paint() method, using "delay redraw" The way to merge some particularly frequent redraw requests when the scroll bar moves, and so on.

The difference between paint () and paintcomponent () in swing