仅当按下Enter键时，按键侦听器才起作用。 对于其他键不起作用

Question

This code works fine when I press "Enter", but not when I press other keys. I added a key event in editable JComboBox which works only when the "Enter" key is pressed. I also want to add an event to another key.

comboBox.getEditor().getEditorComponent().addKeyListener(new KeyAdapter() {
    @Override
    public void keyTyped(KeyEvent e) {
        int keyChar = e.getKeyChar();
        if (keyChar == KeyEvent.VK_ENTER) {
            textField.requestFocus();
        }    
        if (keyChar == KeyEvent.VK_TAB) { // tried other key also such as shift,alt,decimal...  
            textField_2.requestFocus();
        }        
    }
});

Answer 1

Certain keys like TAB, which are used for focus events (eg tabbing from component to component) are already being consumed by the focus subsystem, which is why you are not seeing them on your key listener. https://docs.oracle.com/javase/tutorial/uiswing/events/keylistener.html . Read the part labeled Version Note . The article also offers alternatives on what you can do to capture TAB and other focus keys.