paint - java double buffer doesn't erase -

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i doing project double buffering. when paint, paints on top of old layers, need erase them. repaint() didn't work, i'm guessing equally simple answer.

any ideas?

added code, , disappears, erases background color.

 public void paint(graphics g) {  super.paint(buffer);   for(projectile p: projectiles) drawrectimage(buffer, p.image, p.getrectangle());

}

suggestions:

  • if swing gui, don't override paint method, instead override paintcomponent method. won't current problem, prevent future problems including problems painting of borders , child components.
  • if swing (again don't say), make sure painting component extends jpanel, not jcomponent, since jpanel opaque , fills background rectangle in super method.
  • if it's not swing, should consider changing awt swing.
  • if you're still stuck, yep, you'll want create , post minimal example program. please check out link.

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