Rect
clone()
copyFrom(Rect from)
extend(double x, double y)
extend(Point pt)
extend(Rect box)
offset(double x, double y)
offset(Point pt)
setValue(double x, double y, double width, double height)
shrink(double left, double top, double right, double bottom)
boolean
intersect(Rect box)
isCross(Rect r)