JPopupMenu的助记符/加速符

Question

我在JTable的应用程序中使用JPopupMenu：

public FilePopupMenu(JTable table) {
    super();
    this.table = table;

    // Open File
    JMenuItem open = new JMenuItem("Open file");
    open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, ActionEvent.CTRL_MASK));
    open.addActionListener((ActionEvent e) -> {
        try {
            FileUtils.openFileInNotepad(FileUtils.buildXmlFilePath(selectedRow));
        } catch (MyException e1) {
            LOG.error("Error when opening file : " + selectedRow, e1);
        }
    });
    this.add(open);

    this.addPopupMenuListener(new PopupMenuListener() {
        @Override
        public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
            SwingUtilities.invokeLater(new Runnable() {
                @Override
                public void run() {
                    FilePopupMenu popup = (FilePopupMenu) e.getSource();
                    int rowAtPoint = popup.getTable()
                            .rowAtPoint(SwingUtilities.convertPoint(popup, new Point(0,0), popup.getTable()));
                    if (rowAtPoint > -1) {
                        popup.getTable().setRowSelectionInterval(rowAtPoint, rowAtPoint);
                        @SuppressWarnings("unchecked")
                        Vector<String> selectedRow = (Vector<String>) ((FilePanelModel) popup.getTable()
                                .getModel()).getDataVector()
                                        .get(popup.getTable().getRowSorter().convertRowIndexToModel(rowAtPoint));
                        popup.setSelectedRow(selectedRow);
                    }
                }
            });
        }
    });
}

我向其中每个添加了带有Accelerator的JMenuItem。
但是，当弹出菜单不可见时，这些加速器不起作用。
我尝试使用按键侦听器打开菜单，但它显示在屏幕的左上方，并且无法关闭：

JPopupMenu popup = new FilePopupMenu(tableFiles);
tableFiles.setComponentPopupMenu(popup);
tableFiles.addKeyListener(new KeyListener() {
    public void keyReleased(KeyEvent e) {
         if (e.getKeyCode() == KeyEvent.VK_CONTROL) {
             popup.setVisible(true);
         }
    }
});

我正在考虑创建JMenu，然后将其添加到菜单栏中以使其正常工作。
还有其他想法吗？