Vaadin7 table sort label column numerically

Question

I have vaadin table with multiple columns. One of the column is of label class

container.addContainerProperty(ID_COLUMN, Label.class, "");

and I fill it up like

referenceItem.getItemProperty(ID_COLUMN).setValue(new Label(new Integer(reference.getId()).toString()));

When I sort the table by clicking on this table, it sorts the data like

1
10
100
2
200
7

So, I tried to change the class to Integer, then it works fine, but I get the numbers with comma like

1
2
...
..
7,456
8,455

How can I have the data sorted numerically and no commas.

Answer 1

I was able to figure out. I used Integer as class for my column and used following

referenceTable = new Table()
    {
        @Override
        protected String formatPropertyValue(final Object a_row_id, final Object a_col_id, final Property<?> a_property)
        {
            if (a_property.getType() == Integer.class && null != a_property.getValue())
            {
                DecimalFormat df = (DecimalFormat) DecimalFormat.getInstance(getLocale());
                df.applyLocalizedPattern("#0");
                return df.format(a_property.getValue());
            }
            return super.formatPropertyValue(a_row_id, a_col_id, a_property);
        }
    };