title: How to implement oval GradientPaint?
body: <p>We know that there are a class named <code>RadialGradientPaint</code> in Java and we can use it to have a gradient painting for circle.</p>
  
  <p>But I want to have an oval (ellipse) <code>GradientPaint</code>. How to implement oval <code>GradientPaint</code>?</p>