title: JFreechart(Java) - How to draw lines that is partially dashed lines and partially solid lines?
body: <p>I'm going to plot a line chart that will change from solid line to dashed line to to indicate real data and forecasting data. I'm not sure if i need to extend some of the classes like XYLineAndShapeRenderer or something else, or maybe there is some convenient way to achieve this?</p>
  
  <p>Here is a demostration graph i plotted using Excel.</p>
  
  <p><img src="https://i.stack.imgur.com/hxxmG.png" alt="enter image description here"></p>
  
  <p>I am talking about the gray lines in the graph. That is what i want.
  I don't know if there is a renderer that allow me to indicate which range dashed or solid</p>