Smooth animation (Java SWT) -

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I have a question about animation drawing in Java (SWT). I try to attract some process animation. When I use the CanvasRread () program, it first erases everything that has been pulled and then pulls it again. Approximately 1000 rectangles in my program come at a per-time step (this big quantity is required), so the animation does not look smooth - it blinks all the time for example, for painting new objects on old objects, without erasing them ( Which will look better anyway) is this easy way?

Fixing instability when using custom painting is to use double buffering, SWT canvas object is built in double-buffering Use it by adding the flag to the styles in the constructor: 

  canvas myCanvas = new canvas (parent composite, SWT.DOUBLE_BUFFERED);

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