java - Java Swing 获取输入

Question

如何更改此代码以接受任何键（不仅是 F5）并打印该键？

component.getRootPane().getInputMap(JRootPane.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(KeyEvent.VK_F5, 0), "F5 Pressed");
component.getRootPane().getActionMap().put("F5 Pressed", new AbstractAction() {
    @Override
    public void actionPerformed(ActionEvent e) {
        // Code here
    }
});

Answer 1

我如何（“cahnhe”）这个代码来接受任何键（不仅是 F5）并打印键？

• 抱歉，这个问题并没有让我觉得有点意思，以这种形式

• 基本在教程中描述，

• component.getRootPane()可能仅对JFrame, JDialog,JWindow有效，实际上只有JFrame可访问的RootPane

• 否则直接Input/ActionMap添加到所需的JComponent

Answer 2

用于KeyboardFocusManager注册KeyEventDispatcher：

KeboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(new KeyEventDispatcher() {       
    @Override
    public boolean dispatchKeyEvent(KeyEvent ke) {
        if (yourComponent.hasFocus && ke.getID == KeyEvent.KEY_TYPED) {
            // Your code here
            // Use ke.getKeyChar() to detect which key was pressed.
        }
    }
}