How do I get a value of a cell when user selects in a JTable?

Hi everybody,
I need some help in order to complete my task. I 've a JTable. When user selects any particular column . I should able to get user selected value. I added a MouseListener to the table. And I 've written the following code - in mousePressed()
JTable table = (JTable) e.getSource();
iint col =JTablePartNumbers.getInstance().getSelectedColumn();
int row = JTablePartNumbers.getInstance().getSelectedRow();
System.out.println("row col value" +JTableModelPartNumbers.getInstance().getValueAt(row,col));
I'm getting col and row value but when I'm using TableModel.getValue(row,col) - it is giving me null value.
And my getValueAt() method is defined as
public Object getValueAt( int nRow, int nCol )
     System.out.println("the nRow" nRow "And nCol " nCol "And row count" + getRowCount());
     int rowCount = getRowCount();
     System.out.println("the row count" +rowCount);
if ( ( nRow < 0 ) || ( nRow >= getRowCount() ))
     return null;
          // Taking
          StartNewRevisedGenericSGMLFragmentsModel row = (StartNewRevisedGenericSGMLFragmentsModel) partNumberDetails.elementAt( nRow );
     //     System.out.println("row value" nRow "Col value" +nCol);
          switch ( nCol )
               case 0:
               return row.getParNo();                               case 1:
                    return row.getRev(); // gets model data
               case 2:
                    return row.getDoneDate( );// gets revision data
          Vector rowVec = (Vector) partNumberDetails.get(nRow);
     return (String) rowVec.get(nCol);
so please help me out resolving this problem.
Thanks in advance
purnima

try calling jtable.getSelectionModel().addListSelectionListener(...)
by the way, any good design of a generic UI Table must have a feature to do what you're talking about in an easy way. If it didn't, why would anyone use it?

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