javajavafx：为什么不管我传递给'textArea'的是什么类型的'changeListener'都无法编译。getKeyPressedProperty（）。addListener`

Question

JavaFx代码：

public class MyController implements Initializable {
    @FXML
    private TextArea editor;

    @Override
    public void initialize(URL url, ResourceBundle resourceBundle) {

        editor.onKeyReleasedProperty().addListener(new ChangeListener<KeyEvent>() {
            @Override
            public void changed(ObservableValue<? extends KeyEvent> o, KeyEvent oldVal, KeyEvent newVal) {
                System.out.println("changed!");
            }
        });
    }
}

无法在new ChangeListener...行上编译此代码，错误为：

Can't resolve method 'addListener
  (javafx.beans.value.ChangeListener<javafx.scene.input.KeyEvent>>)'

我一次又一次地修改代码，但我找不到一种方法让它编译

（我使用的是Intellij IDEA 13+jdk 1.7）

Answer 1

确实要将侦听器添加到onKeyReleasedProperty()属性吗

我猜你在寻找

editor.addEventHandler(KeyEvent.KEY_RELEASED, new EventHandler<KeyEvent>() {
    @Override
    public void handle(KeyEvent event) {
    }
});

或者简而言之

editor.setOnKeyReleased(new EventHandler<KeyEvent>() {
    @Override
    public void handle(KeyEvent event) {
    }
});

否则亚西尔亚斯的答案是正确的

Answer 2

editor.onKeyReleasedProperty().addListener(new ChangeListener<EventHandler<? super KeyEvent>> () {
  @Override
  public void changed(ObservableValue<? extends EventHandler<? super KeyEvent>> observable, EventHandler<? super KeyEvent> oldValue, EventHandler<? super KeyEvent> newValue) {
    System.out.println("changed!");
  }
});