8176040: Documentation of java.awt.Rectangle.add(java.awt.Point) is wrong

Reviewed-by: serb, prr

Author: Alexander Zuev

src/java.desktop/share/classes/java/awt/Rectangle.java

@@ -922,7 +922,7 @@ public Rectangle union(Rectangle r) {
      * If the specified point must be contained within the new
      * {@code Rectangle}, a 1x1 rectangle should be added instead:
      * <pre>
-     *     r.add(newx, newy, 1, 1);
+     *     r.add(new Rectangle(newx, newy, 1, 1));
      * </pre>
      * @param newx the X coordinate of the new point
      * @param newy the Y coordinate of the new point
@@ -973,7 +973,7 @@ public void add(int newx, int newy) {
      * If the specified point must be contained within the new
      * {@code Rectangle}, a 1x1 rectangle should be added instead:
      * <pre>
-     *     r.add(pt.x, pt.y, 1, 1);
+     *     r.add(new Rectangle(pt, new Dimension(1, 1)));
      * </pre>
      * @param pt the new {@code Point} to add to this
      *           {@code Rectangle}