Keylistener不响应numlock编号

Question

我正在制作一个用于监听ctrl-1和ctrl-2的keylistener。

我正在为团队做一个小测验。如果1队想要回答，他们应该按ctrl-1。如果2队想要回答，他们应该按ctrl-2。

我选择ctrl的原因是有两个控制键。因此，两支球队可以在一个键盘上互相比赛。

我希望1队使用左边的控件和F1-F12下的数字。团队2使用正确的控件和numlock上的数字。

我的代码注册了team 1的触发器，但不是team 2的触发器。下面是我的代码：

        public void keyPressed(KeyEvent e) {
            if((QuizController)getController() != null){
                if(e.getKeyCode () == KeyEvent.VK_1){
                    if((e.getModifiers() & KeyEvent.CTRL_MASK) != 0)
                        System.out.println("Team 1");
                }
                if(e.getKeyCode () == KeyEvent.VK_2){
                    if((e.getModifiers() & KeyEvent.CTRL_MASK) != 0)
                        System.out.println("Team 2");
                }
            }

        }

编辑:我只是用键绑定，给出了同样的问题，这是代码。

AbstractAction team1 = new AbstractAction() {
        public void actionPerformed(ActionEvent arg0) {
            System.out.println("Team 1");

        }
    };

AbstractAction team2 = new AbstractAction() {

        @Override
        public void actionPerformed(ActionEvent arg0) {
            System.out.println("Team 2");

        }
    };

    getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_1, java.awt.event.InputEvent.CTRL_DOWN_MASK),"actionMap1");
    getActionMap().put("actionMap1", team1);

    getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_2, java.awt.event.InputEvent.CTRL_DOWN_MASK),"actionMap2");
    getActionMap().put("actionMap2", team2);

谢谢!

Answer 1

首先，我强烈推荐使用key bindings API。

Second KeyEvent.VK_1不是为numpad+1引发的相同事件，而是由KeyEvent.VK_NUMPAD1触发的，它是一个不同的键事件，就像功能键是从KeyEvent.VK_F1引发到12事件一样。

例如..。

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.KeyStroke;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class KeyBindingsTest {

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

    public KeyBindingsTest() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        private JLabel state;

        public TestPane() {
            setLayout(new GridBagLayout());
            state = new JLabel("Nothing here");
            add(state);

            InputMap im = getInputMap(WHEN_IN_FOCUSED_WINDOW);
            im.put(KeyStroke.getKeyStroke(KeyEvent.VK_1, KeyEvent.CTRL_DOWN_MASK), "Ctrl+1");
            im.put(KeyStroke.getKeyStroke(KeyEvent.VK_2, KeyEvent.CTRL_DOWN_MASK), "Ctrl+2");
            im.put(KeyStroke.getKeyStroke(KeyEvent.VK_NUMPAD1, KeyEvent.CTRL_DOWN_MASK), "Ctrl+1");
            im.put(KeyStroke.getKeyStroke(KeyEvent.VK_NUMPAD2, KeyEvent.CTRL_DOWN_MASK), "Ctrl+2");

            ActionMap am = getActionMap();
            am.put("Ctrl+1", new MessageAction("Ctrl+1"));
            am.put("Ctrl+2", new MessageAction("Ctrl+2"));
        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(200, 200);
        }

        public class MessageAction extends AbstractAction {

            private String message;

            public MessageAction(String message) {
                this.message = message;
            }

            @Override
            public void actionPerformed(ActionEvent e) {
                state.setText(message);
            }

        }

    }

}