JTableのセル文字揃え

TableColumn col = table.getColumnModel().getColumn(1);
col.setCellRenderer(new HorizontalAlignmentTableRenderer());
// ...
class HorizontalAlignmentTableRenderer extends DefaultTableCellRenderer {
  @Override public Component getTableCellRendererComponent(JTable table,
        Object value, boolean isSelected, boolean hasFocus, int row, int column) {
    Component c = super.getTableCellRendererComponent(
        table, value, isSelected, hasFocus, row, column);
    if (c instanceof JLabel) {
      initLabel((JLabel) c, row);
    }
    return c;
  }

  private void initLabel(JLabel l, int row) {
    if (leftRadio.isSelected()) {
      l.setHorizontalAlignment(SwingConstants.LEFT);
    } else if (centerRadio.isSelected()) {
      l.setHorizontalAlignment(SwingConstants.CENTER);
    } else if (rightRadio.isSelected()) {
      l.setHorizontalAlignment(SwingConstants.RIGHT);
    } else if (customRadio.isSelected()) {
      l.setHorizontalAlignment(row % 3 == 0 ? SwingConstants.LEFT:
                               row % 3 == 1 ? SwingConstants.CENTER:
                                              SwingConstants.RIGHT);
    }
  }
}