final JTable t = new JTable();
t.setCellSelectionEnabled(false);
t.setColumnSelectionAllowed(false);
t.setRowSelectionAllowed(true);
t.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
t.setDefaultEditor(Object.class, 
new DefaultCellEditor(new JTextField())
{
  public boolean isCellEditable(EventObject e)
  {
    if (e instanceof MouseEvent)
    {
      int count = ((MouseEvent) e).getClickCount();
      Point p = ((MouseEvent) e).getPoint();
 
      int previousRow = t.getSelectedRow();
      int previousColumn = t.getSelectedColumn();
      int selectedRow = t.rowAtPoint(p);
      int selectedColumn = t.columnAtPoint(p);
 
      System.out.println("Count = " + count);
      System.out.println("Previous; Row = " + previousRow + " , Column = " + previousColumn);
      System.out.println("Selected; Row = " + selectedRow + " , Column = " + selectedColumn);
 
      return (selectedRow == previousRow || count == 2);
    }
 
    // Check keyboard input event?
 
    return false;
  }
});