关于jtable,tableModel,tabelPanel的问题

Question

问题如下，假设用鼠标点选中的一行表里面的数据，并且让这一行hilight，使用的是如下代码：  protected void billPdtListTbl_mousePressed(MouseEvent e)
{
int index=((GenericTable)e.getSource()).getSelectedRow();
JaMClient.getEventLog().writeTrace("renjie:: billPdtListTbl.getSelectedRow()= " + billPdtListTbl.getSelectedRow());
JaMClient.getEventLog().writeTrace("renjie:: billPdtListTbl.getSelectedColumn()= " + ((GenericTable)e.getSource()).getSelectedColumn());
        if ((billPdtListTbl.getSelectedColumn()==1)||(billPdtListTbl.getSelectedColumn()==5)) { 
          billPdtListTbl.addRowSelectionInterval(index, billPdtListTbl.getSelectedColumn());
          JaMClient.getEventLog().writeTrace("renjie:: aaa " );
        }      
}为何打出来的log是：
[2005-03-09 16:06:16]: renjie:: billPdtListTbl.getSelectedRow()= -1
[2005-03-09 16:06:16]: renjie:: billPdtListTbl.getSelectedColumn()= -1
也就是说根本就没有选中。另位请问一下如何使hilight，使用哪个函数？小弟谢谢了先