title: Bar JFree Charts y-axis
body: <p>I want to display Bar chart using jfree charts. I am able to display string data on y-axis
  like A 0,B 100 on y-axis but the bars are displaying long.the bars are not displaying in proper format.
  how to encode  y-values as integers in my dataset while still i have to display string data displayed above in that format?</p>