在JavaFX中获取CapsLock-state

Question

frame.addKeyListener(new KeyListener() {
        public void keyTyped(KeyEvent e) {
            if(e.getKeyCode() == KeyEvent.VK_CAPS_LOCK){
                System.out.println(Toolkit.getDefaultToolkit().getLockingKeyState(KeyEvent.VK_CAPS_LOCK));
            } else if(e.isShiftDown()){
                System.out.println("SHIFT");
            }
        }

        public void keyPressed(KeyEvent e) {
            if(e.getKeyCode() == KeyEvent.VK_CAPS_LOCK){
                System.out.println(Toolkit.getDefaultToolkit().getLockingKeyState(KeyEvent.VK_CAPS_LOCK));
            } else if(e.isShiftDown()){
                System.out.println("SHIFT");
            }
        }

        public void keyReleased(KeyEvent e) {
            if(e.getKeyCode() == KeyEvent.VK_CAPS_LOCK){
                System.out.println(Toolkit.getDefaultToolkit().getLockingKeyState(KeyEvent.VK_CAPS_LOCK));
            } else if(e.isShiftDown()){
                System.out.println("SHIFT");
            }
        }
});

JavaFX（始终呈现相同状态）

scene.setOnKeyReleased(new EventHandler<javafx.scene.input.KeyEvent>() {
    @Override
    public void handle(javafx.scene.input.KeyEvent event) {
        if(event.getCode() == KeyCode.CAPS){
            System.out.println("CAPS");
            System.out.println(Toolkit.getDefaultToolkit().getLockingKeyState(KeyEvent.VK_CAPS_LOCK));
        }
    }
});

有人知道为什么吗？我能做什么？

Answer 1

编辑：这似乎是一个与windows相关的问题。这个问题有一个可能对你有用的答案

当重复按下caps lock时，我可以使用以下控制台输出：

Capslock已按下

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.input.KeyCode;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;

import java.awt.*;
import java.awt.event.KeyEvent;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {

        Pane root = new Pane();
        Scene scene = new Scene(root, 500, 500);

        primaryStage.setScene(scene);
        primaryStage.show();

        //scene.setOnKeyPressed( event -> {
        scene.setOnKeyReleased( event -> {
            if ( event.getCode() == KeyCode.CAPS ) {
                System.out.println("Capslock pressed");
                System.out.println("Capslock state: " + Toolkit.getDefaultToolkit().getLockingKeyState(KeyEvent.VK_CAPS_LOCK));
            }
        });

    }

    public static void main(String[] args) {
        launch(args);
    }
}