Setting Table Cell Renderer for a row or cell

Question

I need to make a JTable that has the following formats:
Row 1 = number with no decimals and columns
Row 2 = number with no decimals and columns
Row 3 = percent with 4 decimals
I can use a table cell renderer to set each COLUMN as one or the other formats like this:
NumDispRenderer ndr = new NumDispRenderer();
for(int i = 1;i<dates.size();i++) {
table.getColumnModel().getColumn(i).setCellRenderer(ndr);
Where NumDispRenderer is a class as follows:
public class NumDispRenderer extends DefaultTableCellRenderer {
public Component getTableCellRendererComponent (JTable table, Object value,boolean isSelected, boolean isFocused, int row, int column) {
Component component = super.getTableCellRendererComponent (table,value,isSelected,isFocused,row,column);
if (value != null && value instanceof Double) {
DecimalFormat df = new DecimalFormat("###,###");
String output = df.format(value);
((JLabel)component).setText(output);
((JLabel)component).setHorizontalAlignment(JLabel.RIGHT);
} else {
((JLabel)component).setText(value == null ? "" : value.toString());
return component;
This is fine for the first two rows, but the third row (which is also an instance of Double) I would like to format differently.
The tutorial and other postings have not given a solution to this problem. Any suggestions would be very appreciated.

Answer 1

Hi,
the method getTableCellRendererComponent() of your renderer gets the row as a parameter. So just create the label depending on that value. For 0<=row<=1 you create the label as is, and for row=2 you create another label with the Double formatted as you wish.
Andre