JavaFX KeyEvent返回KeyCode.UNDEFINED [英] JavaFX KeyEvent returns KeyCode.UNDEFINED

问题描述

我创建了一个简单的JavaFX应用程序，它接收来自TextField中用户的输入。我将KeyTyped事件从SceneBuilder附加到控制器。我的函数如下所示：

I created a simple JavaFX application that receives input from the user in a TextField. I attached the KeyTyped event from SceneBuilder to the controller. My function looks like this:

@FXML private void keyTyped(KeyEvent event) {
    System.out.println(event.getCode().equals(KeyCode.ENTER));
}

当我输入回车键时，此功能始终打印出UNDEFINED。有想法该怎么解决这个吗？我打字的其他字母似乎也有同样的问题。

This function always prints out UNDEFINED when I type the enter key. Any ideas on how to fix this? Other letters I type seem to have the same problem as well.

推荐答案

KeyTyped 是一个特殊的事件。它没有 KeyCode 但是设置了字符。

KeyTyped is a special event. It doesn't have KeyCode but has character set instead.

查看字母'a'的示例：

See example for letter 'a':

KeyEvent [source = TextField[id=null, styleClass=text-input text-field], 
target = TextField[id=null, styleClass=text-input text-field], eventType = KEY_TYPED, consumed = false, 
character = a, text = , code = UNDEFINED]

和javadoc： http://docs.oracle.com/javafx/2/api/javafx/scene/ input / KeyEvent.html＃getCode（）

与此键中的键相关联的键代码或键
发布活动。对于键入事件，代码总是
KeyCode.UNDEFINED。

The key code associated with the key in this key pressed or key released event. For key typed events, code is always KeyCode.UNDEFINED.

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