class DateCellRenderer extends JLabel implements TableCellRenderer {

    private final DecimalFormat format;
    public static final int BT = 2;
   
    public DateCellRenderer() {
        this.format = new DecimalFormat("###,###");
        setBorder(BorderFactory.createEmptyBorder(BT, BT, BT, BT));
        setOpaque(true);
        }

    public Component getTableCellRendererComponent(JTable table,
                                                   Object value,
                                                   boolean isSelected,
                                                   boolean hasFocus,
                                                   int row,
                                                   int column) {
        
     long date = (long)table.getModel().getValueAt(row, column);  
   
     setText(format.format(date));
      
     setForeground(isSelected ? SystemColor.textHighlightText : SystemColor.textText);
     setBackground(isSelected ? SystemColor.textHighlight : SystemColor.text);
     setHorizontalAlignment(JLabel.RIGHT); 
        return this;
    }