JTabbedPaneのタブをソート

class SortAction extends AbstractAction {
  @Override public void actionPerformed(ActionEvent e) {
    JTabbedPane t = (JTabbedPane) getInvoker();
    List<ComparableTab> list = IntStream.range(0, t.getTabCount())
      .mapToObj(i -> new ComparableTab(t.getTitleAt(i), t.getComponentAt(i)))
      .sorted(Comparator.comparing(ComparableTab::getTitle))
      .collect(Collectors.toList());
    t.removeAll();
    list.forEach(c -> t.addTab(c.getTitle(), c.getComponent()));
  }
}

class ComparableTab {
  private final String title;
  private final Component comp;

  protected ComparableTab(String title, Component comp) {
    this.title = title;
    this.comp  = comp;
  }

  public String getTitle() {
    return title;
  }

  public Component getComponent() {
    return comp;
  }
}