JTable and integers

Question

I have a tablemodel that holds the headers and the amount of rows and then inputted into a Jtable.what im trying to do is gather information in certain columns(ie integers) and add them up with the end result displaying the total at the end of the column.i have tried calling the column but i havent had luck so far.Ive also tried creating a 2d array instead of the tablemodel but no luck

Answer 1

i cannot input anything into my JTable when ur code is put into it. I think its because the tablemodel is (headers,35) so there are no values to start with in each row.
Ive tried alternating ur code to make it add floats in a column but still no luck.
public void BS()
       String[] headers = new String[]{"Assets", "", "Liabilities", "", "Owner's Equity", ""};
        DefaultTableModel model = new DefaultTableModel(headers,35);
        model.addTableModelListener(this);
        bstable = new JTable( model )
               //  Returning the Class of each column will allow different
               //  renderers to be used based on Class
               public Class getColumnClass(int column)
                    return getValueAt(0, column).getClass();
               //  The Cost is not editable
               public boolean isCellEditable(int row, int column)
                    int modelColumn = convertColumnIndexToModel( column );
                    return (modelColumn == 3) ? false : true;
        bstable.getTableHeader().setReorderingAllowed(false);
        bsscrollpane = new JScrollPane(bstable);
        bsscrollpane.setViewportView(bstable);
    public void tableChanged(TableModelEvent e)
          System.out.println(e.getSource());
          if (e.getType() == TableModelEvent.UPDATE)
               int row = e.getFirstRow();
               int column = e.getColumn();
               if (column == 1)
                    TableModel model = bstable.getModel();
                                Float     assets = ((Float)model.getValueAt(row, 1)).floatValue();
                    Float value = new Float(assets);
                    model.setValueAt(value, row, 1);
     }I dont know if the calculate column will work. Do i have to loop it so it keeps on adding the rows in the 1st column.?