1. How to specify exact location for legend items? jfree.org
It isn't supported yet. A good option would be some kind of floating annotation for charts (to be displayed at some fixed (x, y) location within the chart area). An annotation that can display a Title instance would be able to handle a the chart legend as well as text and images.
2. Change the location of the legend jfree.org
3. Legend Location jfree.org
4. Legend Location jfree.org