Swing/SortColumnColor のバックアップ(No.4)

JTable table = new JTable(model) {
  private final Color evenColor = new Color(255, 250, 250);
  @Override public Component prepareRenderer(
      TableCellRenderer tcr, int row, int column) {
    Component c = super.prepareRenderer(tcr, row, column);
    if (isRowSelected(row)) {
      c.setForeground(getSelectionForeground());
      c.setBackground(getSelectionBackground());
    } else {
      c.setForeground(getForeground());
      c.setBackground(isSortingColumn(column) ? evenColor
                                              : getBackground());
    }
    return c;
  }
  private boolean isSortingColumn(int column) {
    RowSorter sorter = getRowSorter();
    if (sorter != null) {
      List list = sorter.getSortKeys();
      if (list.size() > 0) {
        RowSorter.SortKey key0 = (RowSorter.SortKey) list.get(0);
        if (column == convertColumnIndexToView(key0.getColumn())) {
          return true;
        }
      }
    }
    return false;
  }
};