1.ColorsButtons: The user presses one of these buttons before drawing to draw using one of these colors: Red, Green, or Blue. 2.ShapesButtons:The user can press one of these buttons before the drawing ...

Java-rectangle-using-JOptionPane Rectangle class that models a rectangle's properties and behaviors. The class includes methods for calculating its perimeter and area, as well as constructors and ...

If you want to do this yourself the simplest approach is using XOR rendering to make it trivial to "undo" the previous rectangle you drew (if any) and then draw the next.