JTableのセル内で小数点揃え

class AlignDecimalCellRenderer implements TableCellRenderer {
  private final JPanel p = new JPanel(new BorderLayout());
  private final JTextPane textPane = new JTextPane() {
    @Override public Dimension getPreferredSize() {
      Dimension d = super.getPreferredSize();
      d.width = 60;
      return d;
    }
  };

  protected AlignDecimalCellRenderer() {
    textPane.setOpaque(false);
    SimpleAttributeSet attr = new SimpleAttributeSet();
    StyleConstants.setTabSet(attr, new TabSet(new TabStop[] {
        new TabStop(25f, TabStop.ALIGN_DECIMAL, TabStop.LEAD_NONE)
    }));
    textPane.setParagraphAttributes(attr, false);
    p.add(textPane, BorderLayout.EAST);
  }

  @Override public Component getTableCellRendererComponent(
      JTable table, Object value, boolean isSelected, boolean hasFocus,
      int row, int column) {
    textPane.setFont(table.getFont());
    textPane.setText("\t" + Objects.toString(value, ""));
    if (isSelected) {
      textPane.setForeground(table.getSelectionForeground());
      p.setBackground(table.getSelectionBackground());
    } else {
      textPane.setForeground(table.getForeground());
      p.setBackground(table.getBackground());
    }
    return p;
  }
}