Java-将加速器添加到JMenuItem

Question

I want to set an accelerator to a JMenuItem.

Right now I am setting it like this

openFile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, ActionEvent.CTRL_MASK));

and it's working but I don't want ctrl+o as accelerator. I want 'space' as accelerator but I didn't find any method by which I can generate a KeyStroke corresponding to 'space'.

KeyStroke.getStroke()

either takes a char or (int, int). I didn't find any char corresponding to space also.

Answer 1

..didn't find any char corresponding to space also.

KeyEvent.VK_SPACE

I would not be surprised if Swing ignores it, since ' ' is an unusual & hard to see accelerator.

Answer 2

Most UI delegates render a KeyEvent.VK_SPACE accelerator using something like the METRICAL TETRASEME : ⏘ ( U+23D8 ). For example, an Action might include these lines:

static final int MASK = Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
putValue(Action.ACCELERATOR_KEY, KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, MASK));