title: overlapping lables in JFreeChart pie charts
body: <p>i'm using JFreeChart to plot some data in to a pie chart. when the amount of data is getting high 
  the labels of the graph is overlapping as shown below?</p>
  
  <p><img src="https://i.stack.imgur.com/89ycq.png" alt="enter image description here"></p>
  
  <p>can any one suggest me to avoid this issue and show the labels clearly?? </p>
  
  <p>--
  Regards Rangana</p>