r1.setPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f, 
                Color.blue));
        assertFalse(r1.equals(r2));
        r2.setPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f, 
                Color.blue));
        assertTrue(r1.equals(r2));