title: Cell validation in JTable
body: <p>I have a JTable that needs cell validation for the cells where the user can input text. When a user enters invalid text the border of the cell turns red.</p>
  
  <p>I've managed to get this working associating a two dimension array to flag if each cell has errors or not.</p>
  
  <p>The problem is that the user must be able to reorder the table (by column). I have to store the error flag in the table model, not separatly. Anyone has ideas how to do this?</p>