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.
Check out JTable.setSelectionModel in combination with the ListSelectionModel interface. With the addSelectionInterval and insertSelectionInterval methods you determine what rows / columns are actually selected.
Perhaps the easiest way is to wrap the default selection model: