Cell selection not working in JTable
I have a JTable in my application that, for the most part, is working as expected, but cell selection is not. When I click on, or tab into, a cell it appears to be selected (background color change), but when I start typing the new information is appended to the existing rather than replacing it. I have setCellSelection set to true, and thought that would handle everything. Is there something else that I need to do, or is this just something that JTable can't handle?