问题描述
我想为 JMenuItem 设置一个加速器.
I want to set an accelerator to a JMenuItem.
现在我是这样设置的
openFile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, ActionEvent.CTRL_MASK));
它正在工作，但我不希望 ctrl+o 作为加速器.我想要空格"作为加速器，但我没有找到任何可以生成与空格"对应的 KeyStroke 的方法.
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()
要么接受一个字符要么(int，int).我也没有找到任何与空格对应的字符.
either takes a char or (int, int). I didn't find any char corresponding to space also.
推荐答案
大多数 UI 委托使用类似 METRICAL TETRASEME 的东西呈现 KeyEvent.VK_SPACE 加速器: ⏘ (U+23D8).例如，Action 可能包括这些行:
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));
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