停止 OSX 变音符号为所有用户禁用 Java 中的 KeyBindings？

Question

（注意：我知道 this question 用户必须输入终端命令才能解决此问题，但我更喜欢可以将解决方案放入应用程序中的解决方案。 )

解释一下，我在 Java 应用程序中使用 KeyBindings；但是，如果一个人按住 a、e、i、o、u、n、s 等键，变音符号菜单 OSX 会以某种方式完全禁用键输入。

但是，如果相关的话，它不会影响鼠标输入。

下面是一些示例代码，可以在其中演示问题。如果您按住 OSX 上的任何上述键大约一秒钟或更长时间，KeyBindings 将完全停止工作。（不过，我建议按住该键以确保更多。

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.KeyStroke;
import javax.swing.Timer;
import javax.swing.WindowConstants;

public class Test extends JPanel implements ActionListener {
    private static final long serialVersionUID = 1L;

    private static JFrame frame;

    private static boolean up = false, down = false, left = false, right = false;

    private static int x = 275, y = 275;

    public static void main(String[] args) {
        Test t = new Test();
        t.setBounds(0, 0, 1200, 600);
        t.setVisible(true);

        Timer repaintTimer = new Timer(2, t);

        frame = new JFrame();
        frame.setSize(600, 600);

        setUpKeyActions(t);

        frame.add(t);

        Dimension dim = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.setLocation((dim.width - frame.getWidth()) / 2, (dim.height - frame.getHeight()) / 2);
        frame.getContentPane().setLayout(null);
        frame.setAlwaysOnTop(true);
        frame.setResizable(false);

        repaintTimer.start();

        frame.setVisible(true);
        frame.requestFocus();
    }

    private static void setUpKeyActions(Test t) {
        int condition = WHEN_IN_FOCUSED_WINDOW;

        new KeyAction(t, condition, KeyEvent.VK_UP, 0, false) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                up = true;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_UP, 0, true) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                up = false;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_LEFT, 0, false) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                left = true;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_LEFT, 0, true) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                left = false;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_RIGHT, 0, false) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                right = true;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_RIGHT, 0, true) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                right = false;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_DOWN, 0, false) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                down = true;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_DOWN, 0, true) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                down = false;
            }

        };

    }

    private static abstract class KeyAction extends AbstractAction {
        private static final long serialVersionUID = 1L;

        KeyAction(JComponent component, int condition, int keyCode, int modifiers, boolean onKeyRelease) {
            InputMap inputMap = component.getInputMap(condition);
            ActionMap actionMap = component.getActionMap();
            KeyStroke keyStroke = KeyStroke.getKeyStroke(keyCode, modifiers, onKeyRelease);
            inputMap.put(keyStroke, keyStroke.toString());
            actionMap.put(keyStroke.toString(), this);
        }

    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        if(up)
            y -= 1;
        if(down)
            y += 1;
        if(right)
            x += 1;
        if(left)
            x -= 1;
        if(x < 0)
            x = 0;
        else if(x > frame.getWidth() - 30)
            x = frame.getWidth() - 30;
        if(y < 0)
            y = 0;
        else if(y > frame.getHeight() - 50)
            y = frame.getHeight() - 50;
        g.drawRect(x, y, 30, 30);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        frame.repaint();
    }

}

Answer 1

回答我的问题，问题是 Java 版本。

我有 JDK 1.8.0_151，但显然这个问题在 JDK 1.8.0_172.

之前的一些迭代中得到了修复

因此，为了确保我的应用程序的用户不会发生此问题，我将要求 JDK 1.9 或更高版本使用 org.apache.commons。lang3.SystemUtils 并使用 isJavaVersionAtLeast(JavaVersion requiredVersion) 方法来自 this answer.

更新：

我实际上计划使用我从问题中得到的方法，因为它让我不必要求 JRE 1.9，而是允许我制作最小的 1.8.0_172。

停止 OSX 变音符号为所有用户禁用 Java 中的 KeyBindings？

Stop OSX diacritics disabling KeyBindings in Java for all users?

java

macos

diacritics

key-bindings