how can i draw many animated shapes on swt Canvas?

I am trying to draw many shapes on SWT canvas by iterating a list of shapes, paint them, set the new locations and redraw(). This is too slow. wh开发者_JAVA技巧at am I doing wrong?

From this high level perspective there's no flaw. If you need more information you should provide

• some distilled code (to detect programming flaws)
• the expected frame rate (to detect expectation flaws)
• the number of shapes (see above)

Some quick research on the internet revealed that using a for loop might be a bit faster. It depends on how many shapes do you have?