title: JavaFX Canvas clear Circle
body: <p>I am creating a paint program, and every paint program has an eraser tool in it. Therefore, I would like mine to have one as well, the only issue being that I don't know how to clear a circular area in a Canvas using a GraphicsContext. Is there a special paint or effect I can use to be able to clear a circle? I know there already is the <code>clearRect(x,y,w,h)</code> method, but I would like a clear circle method so that my eraser can have a circular brush. The code I have so far is this...</p>
  
  <pre><code>canvas.setOnMouseClicked(e-&gt;{
      if(brushType == ERASER){
          //do something with graphics
      }
  }
  </code></pre>