This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
You can do it the hard way as well:
1) use the API to get the row on which the user clicked
2) use the cell renderer to get the renderer component for that cell
3) translate the mouse point such that it is relative to the renderer component
4) handle the mouse click manually given the translated mouse point
I've done this for a table and a tree renderer in the past, and it works.