Java JMenuItem未通过键盘输入键激活

我会自动生成一组JMenuItem，并在每次右键单击事件时将它们添加到jpopMenu。问题是，当我按所选菜单上的enter键时，为菜单项设置的操作没有运行。我可以使用上/下键在菜单上导航，但是，该操作只能通过鼠标单击来运行

以下是创建菜单项的代码：

private JMenuItem createMenuItem(TaskFactory tf, String title, boolean useCheckBoxMenuItem, String toolTipText) {

    enter code hereJMenuItem item;
    PopupAction action = new PopupAction(tf, title);
    if ( useCheckBoxMenuItem )
        item = new JCheckBoxMenuItem(action);
    else
        item = new JMenuItem(action);
    item.setEnabled(tf.isReady());
    item.setToolTipText(toolTipText);
    return item;
}

private class PopupAction extends AbstractAction {

    TaskFactory tf;
    PopupAction(TaskFactory tf, String title) {
        super( title );
        this.tf = tf;
    }
    public void actionPerformed(ActionEvent ae) {
        m_view.manager.execute(tf.createTaskIterator());
    }
}

---

我曾尝试将focusable设置为true，但没有成功。我已经在Mac10.7、Java版本1.6.0\u33和Ubuntu Java版本1.6.0\u26上试用过。我使用了标准的秋千外观和感觉。在Mac上运行时：look and feel是[Aqua look and feel for Mac OS X-com.apple.laf.AquaLookAndFeel]

AFAIK，这就是look'n feel的工作原理。按空格键可以单击按钮和菜单项。Enter用于单击默认按钮。

AFAIK，这就是外观的工作原理。按空格键可以单击按钮和菜单项。输入用于单击默认按钮。

Windows XP、JDK6_025、使用物质、金属、Windows、Nimbus

编辑1

按下on键或鼠标会触发

isEnabled

编辑2

添加了

MenuKeyListener

注意

不要使用

MenuKeyListener

捕捉另一个

KeyEvents

as（空格）和are，否则有时会生成虚假结果，例如

未知keyCode:0x0 on…

import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.event.MenuKeyEvent;
import javax.swing.event.MenuKeyListener;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;
import javax.swing.table.*;
import org.pushingpixels.substance.api.SubstanceLookAndFeel;
import org.pushingpixels.substance.api.skin.BusinessBlueSteelSkin;

public class TableCheckBox extends JFrame {

    private static final long serialVersionUID = 1L;
    private JTable table;

    public TableCheckBox() {
        Object[] columnNames = {"Type", "Company", "Shares", "Price", "Boolean"};
        Object[][] data = {
            {"Buy", "IBM", new Integer(1000), new Double(80.50), false},
            {"Sell", "MicroSoft", new Integer(2000), new Double(6.25), true},
            {"Sell", "Apple", new Integer(3000), new Double(7.35), true},
            {"Buy", "Nortel", new Integer(4000), new Double(20.00), false}
        };
        DefaultTableModel model = new DefaultTableModel(data, columnNames);
        table = new JTable(model) {

            private static final long serialVersionUID = 1L;

            @Override
            public Class getColumnClass(int column) {
                return getValueAt(0, column).getClass();
            }
        };
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        JScrollPane scrollPane = new JScrollPane(table);
        add(scrollPane);
        createPopupMenu();
    }

    private void createPopupMenu() {
        MyMenuKeyListener myMenuKeyListener = new MyMenuKeyListener();
        JPopupMenu popup = new JPopupMenu();
        JMenuItem myMenuItem1 = new JMenuItem("cccccccccccccccccccccc");
        myMenuItem1.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                //System.out.println("Done myMenuItem1");
            }
        });
        myMenuItem1.getModel().addChangeListener(new ChangeListener() {

            @Override
            public void stateChanged(ChangeEvent e) {
                ButtonModel model = (ButtonModel) e.getSource();
                if (model.isArmed()) {
                    //System.out.println("isArmed");
                } else if (model.isEnabled()) {
                    //System.out.println("isEnabled");
                } else if (model.isPressed()) {
                    //System.out.println("isPressed");
                } else if (model.isRollover()) {
                    //System.out.println("isRollover");
                } else if (model.isSelected()) {
                    //System.out.println("isSelected");
                }
            }
        });
        myMenuItem1.addMenuKeyListener(myMenuKeyListener);

        JMenuItem myMenuItem2 = new JMenuItem("bbbbbbbbbbbbbbbbbbbbbb");
        myMenuItem2.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                //System.out.println("Done myMenuItem2");
            }
        });
        myMenuItem2.getModel().addChangeListener(new ChangeListener() {

            @Override
            public void stateChanged(ChangeEvent e) {
                ButtonModel model = (ButtonModel) e.getSource();
                if (model.isArmed()) {
                    //System.out.println("isArmed");
                } else if (model.isEnabled()) {
                    //System.out.println("isEnabled");
                } else if (model.isPressed()) {
                    //System.out.println("isPressed");
                } else if (model.isRollover()) {
                    //System.out.println("isRollover");
                } else if (model.isSelected()) {
                    //System.out.println("isSelected");
                }
            }
        });
        myMenuItem2.addMenuKeyListener(myMenuKeyListener);

        popup.add(myMenuItem1);
        popup.add(myMenuItem2);
        MouseListener popupListener = new PopupListener(popup);
        table.addMouseListener(popupListener);
        popup.setLightWeightPopupEnabled(false);
        PopupMenuListener popupMenuListener = new MyPopupMenuListener();
        popup.addPopupMenuListener(popupMenuListener);
    }

    private class PopupListener extends MouseAdapter {

        private JPopupMenu popup;

        PopupListener(JPopupMenu popupMenu) {
            popup = popupMenu;
        }

        @Override
        public void mousePressed(MouseEvent e) {
            maybeShowPopup(e);
        }

        @Override
        public void mouseReleased(MouseEvent e) {
            if (table.getSelectedRow() != -1) {
                maybeShowPopup(e);
            }
        }

        private void maybeShowPopup(MouseEvent e) {
            if (e.isPopupTrigger()) {
                popup.show(e.getComponent(), e.getX(), e.getY());
            }
        }
    }

    private class MyMenuKeyListener implements MenuKeyListener {

        public void menuKeyTyped(MenuKeyEvent e) {
            MenuElement[] path = e.getPath();
            JMenuItem item = (JMenuItem) path[path.length - 1];
            System.out.println("Key typed: " + e.getKeyChar()
                    + ", " + MenuKeyEvent.getKeyText(e.getKeyCode())
                    + " on " + item.getText());
        }

        public void menuKeyPressed(MenuKeyEvent e) {
            MenuElement[] path = e.getPath();
            JMenuItem item = (JMenuItem) path[path.length - 1];
            System.out.println("Key typed: " + e.getKeyChar()
                    + ", " + MenuKeyEvent.getKeyText(e.getKeyCode())
                    + " on " + item.getText());
        }

        public void menuKeyReleased(MenuKeyEvent e) {
            MenuElement[] path = e.getPath();
            JMenuItem item = (JMenuItem) path[path.length - 1];
            System.out.println("Key typed: " + e.getKeyChar()
                    + ", " + MenuKeyEvent.getKeyText(e.getKeyCode())
                    + " on " + item.getText());
        }
    }

    private class MyPopupMenuListener implements PopupMenuListener {

        public void popupMenuCanceled(PopupMenuEvent popupMenuEvent) {
            //System.out.println("Canceled");
        }

        public void popupMenuWillBecomeInvisible(PopupMenuEvent popupMenuEvent) {
            //System.out.println("Becoming Invisible");
        }

        public void popupMenuWillBecomeVisible(PopupMenuEvent popupMenuEvent) {
            //System.out.println("Becoming Visible");
        }
    }

    public static void main(String[] args) {
        /*SwingUtilities.invokeLater(new Runnable() {

        public void run() {
        SubstanceLookAndFeel.setSkin(new BusinessBlueSteelSkin());
        }
        });*/
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
            /*UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());*/
        } catch (ClassNotFoundException ex) {
        } catch (InstantiationException ex) {
        } catch (IllegalAccessException ex) {
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        }
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                TableCheckBox frame = new TableCheckBox();
                frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
                frame.pack();
                frame.setLocation(150, 150);
                frame.setVisible(true);
            }
        });
    }
}

---

Windows XP、JDK6_025、使用物质、金属、Windows、Nimbus

编辑1

按下on键或鼠标会触发

isEnabled

编辑2

添加了

MenuKeyListener

注意

不要使用

MenuKeyListener

捕捉另一个

KeyEvents

as（空格）和are，否则有时会生成虚假结果，例如

未知keyCode:0x0 on…

import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.event.MenuKeyEvent;
import javax.swing.event.MenuKeyListener;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;
import javax.swing.table.*;
import org.pushingpixels.substance.api.SubstanceLookAndFeel;
import org.pushingpixels.substance.api.skin.BusinessBlueSteelSkin;

public class TableCheckBox extends JFrame {

    private static final long serialVersionUID = 1L;
    private JTable table;

    public TableCheckBox() {
        Object[] columnNames = {"Type", "Company", "Shares", "Price", "Boolean"};
        Object[][] data = {
            {"Buy", "IBM", new Integer(1000), new Double(80.50), false},
            {"Sell", "MicroSoft", new Integer(2000), new Double(6.25), true},
            {"Sell", "Apple", new Integer(3000), new Double(7.35), true},
            {"Buy", "Nortel", new Integer(4000), new Double(20.00), false}
        };
        DefaultTableModel model = new DefaultTableModel(data, columnNames);
        table = new JTable(model) {

            private static final long serialVersionUID = 1L;

            @Override
            public Class getColumnClass(int column) {
                return getValueAt(0, column).getClass();
            }
        };
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        JScrollPane scrollPane = new JScrollPane(table);
        add(scrollPane);
        createPopupMenu();
    }

    private void createPopupMenu() {
        MyMenuKeyListener myMenuKeyListener = new MyMenuKeyListener();
        JPopupMenu popup = new JPopupMenu();
        JMenuItem myMenuItem1 = new JMenuItem("cccccccccccccccccccccc");
        myMenuItem1.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                //System.out.println("Done myMenuItem1");
            }
        });
        myMenuItem1.getModel().addChangeListener(new ChangeListener() {

            @Override
            public void stateChanged(ChangeEvent e) {
                ButtonModel model = (ButtonModel) e.getSource();
                if (model.isArmed()) {
                    //System.out.println("isArmed");
                } else if (model.isEnabled()) {
                    //System.out.println("isEnabled");
                } else if (model.isPressed()) {
                    //System.out.println("isPressed");
                } else if (model.isRollover()) {
                    //System.out.println("isRollover");
                } else if (model.isSelected()) {
                    //System.out.println("isSelected");
                }
            }
        });
        myMenuItem1.addMenuKeyListener(myMenuKeyListener);

        JMenuItem myMenuItem2 = new JMenuItem("bbbbbbbbbbbbbbbbbbbbbb");
        myMenuItem2.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                //System.out.println("Done myMenuItem2");
            }
        });
        myMenuItem2.getModel().addChangeListener(new ChangeListener() {

            @Override
            public void stateChanged(ChangeEvent e) {
                ButtonModel model = (ButtonModel) e.getSource();
                if (model.isArmed()) {
                    //System.out.println("isArmed");
                } else if (model.isEnabled()) {
                    //System.out.println("isEnabled");
                } else if (model.isPressed()) {
                    //System.out.println("isPressed");
                } else if (model.isRollover()) {
                    //System.out.println("isRollover");
                } else if (model.isSelected()) {
                    //System.out.println("isSelected");
                }
            }
        });
        myMenuItem2.addMenuKeyListener(myMenuKeyListener);

        popup.add(myMenuItem1);
        popup.add(myMenuItem2);
        MouseListener popupListener = new PopupListener(popup);
        table.addMouseListener(popupListener);
        popup.setLightWeightPopupEnabled(false);
        PopupMenuListener popupMenuListener = new MyPopupMenuListener();
        popup.addPopupMenuListener(popupMenuListener);
    }

    private class PopupListener extends MouseAdapter {

        private JPopupMenu popup;

        PopupListener(JPopupMenu popupMenu) {
            popup = popupMenu;
        }

        @Override
        public void mousePressed(MouseEvent e) {
            maybeShowPopup(e);
        }

        @Override
        public void mouseReleased(MouseEvent e) {
            if (table.getSelectedRow() != -1) {
                maybeShowPopup(e);
            }
        }

        private void maybeShowPopup(MouseEvent e) {
            if (e.isPopupTrigger()) {
                popup.show(e.getComponent(), e.getX(), e.getY());
            }
        }
    }

    private class MyMenuKeyListener implements MenuKeyListener {

        public void menuKeyTyped(MenuKeyEvent e) {
            MenuElement[] path = e.getPath();
            JMenuItem item = (JMenuItem) path[path.length - 1];
            System.out.println("Key typed: " + e.getKeyChar()
                    + ", " + MenuKeyEvent.getKeyText(e.getKeyCode())
                    + " on " + item.getText());
        }

        public void menuKeyPressed(MenuKeyEvent e) {
            MenuElement[] path = e.getPath();
            JMenuItem item = (JMenuItem) path[path.length - 1];
            System.out.println("Key typed: " + e.getKeyChar()
                    + ", " + MenuKeyEvent.getKeyText(e.getKeyCode())
                    + " on " + item.getText());
        }

        public void menuKeyReleased(MenuKeyEvent e) {
            MenuElement[] path = e.getPath();
            JMenuItem item = (JMenuItem) path[path.length - 1];
            System.out.println("Key typed: " + e.getKeyChar()
                    + ", " + MenuKeyEvent.getKeyText(e.getKeyCode())
                    + " on " + item.getText());
        }
    }

    private class MyPopupMenuListener implements PopupMenuListener {

        public void popupMenuCanceled(PopupMenuEvent popupMenuEvent) {
            //System.out.println("Canceled");
        }

        public void popupMenuWillBecomeInvisible(PopupMenuEvent popupMenuEvent) {
            //System.out.println("Becoming Invisible");
        }

        public void popupMenuWillBecomeVisible(PopupMenuEvent popupMenuEvent) {
            //System.out.println("Becoming Visible");
        }
    }

    public static void main(String[] args) {
        /*SwingUtilities.invokeLater(new Runnable() {

        public void run() {
        SubstanceLookAndFeel.setSkin(new BusinessBlueSteelSkin());
        }
        });*/
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
            /*UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());*/
        } catch (ClassNotFoundException ex) {
        } catch (InstantiationException ex) {
        } catch (IllegalAccessException ex) {
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        }
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                TableCheckBox frame = new TableCheckBox();
                frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
                frame.pack();
                frame.setLocation(150, 150);
                frame.setVisible(true);
            }
        });
    }
}

---

您需要向JMenuItem添加一个KeyListener，并将该项设置为可聚焦。让您的JMenuItem请求焦点与

JMenuItem.requestFocus();

当它有焦点时，实现起来很容易

在keylistener中：

        @Override
        public void keyReleased(KeyEvent e) {
            if (e.getKeyCode() == e.VK_ENTER) {
                // do stuff
            }

        }

---

您需要向JMenuItem添加一个KeyListener，并将该项设置为可聚焦。让您的JMenuItem请求焦点与

JMenuItem.requestFocus();

当它有焦点时，实现起来很容易

在keylistener中：

        @Override
        public void keyReleased(KeyEvent e) {
            if (e.getKeyCode() == e.VK_ENTER) {
                // do stuff
            }

        }

对于添加到菜单栏的项目和通过

setComponentPopupMenu（）

添加到上下文菜单的项目，使用

Action

似乎可以正确地执行此操作。Enter或Space从菜单栏或关联菜单中调用选定的菜单项

另一方面，请注意使用

getMenuShortcutKeyMask（）

作为跨平台

MASK

对于添加到菜单栏的项目和通过

setComponentPopupMenu（）

添加到上下文菜单的项目，使用

Action

似乎可以正常工作。Enter或Space从菜单栏或关联菜单中调用选定的菜单项

---

---

另外，请注意使用

getMenuShortcutKeyMask（）

作为跨平台

MASK

谢谢回复，空格键也不起作用！对我来说，空格键或回车键都可以，如果他们运行这个动作。user1475727请你具体点，NativeOS、Java版本和used Look and Feel中的哪一个是对的，因为（@JB niset）可能是对的。我已经在Mac 10.7上试过了，Java版本1.6.0!和Ubuntu Java版本1.6.0!26。我使用的是标准的swing外观。@user1475727那么您正在等待真正的swing&OSX（***nix）专家，我将为replu更新tagsThanks，空格键也不起作用！对我来说，空格键或回车键都可以，如果他们运行这个动作。user1475727请你具体点，NativeOS、Java版本和used Look and Feel中的哪一个是对的，因为（@JB niset）可能是对的。我已经在Mac 10.7上试过了，Java版本1.6.0!和Ubuntu Java版本1.6.0!26。我使用了标准的swing外观。@user1475727那么你已经在等待真正的swing&OSX（***nix）专家了，我会更新tagsI刚刚尝试了这个，但没有效果，菜单项不监听关键事件@user1475727非常奇怪，它在JMenuBar中有，但不是在jpopMenu中，我将查看它。没错，菜单栏也适用于我的应用程序！我刚刚尝试了这个，但没有成功，菜单项不收听关键事件@user1475727非常奇怪，它在JMenuBar中有，但不是在jpopMenu中，我将查看它。没错，菜单栏也适用于我的应用程序！请查看我的编辑，测试

ButtonModel

作为我最喜欢的

XxxMenuXxx

的监听器，他们的键盘或鼠标尝试应用Nimbus外观，但菜单项仍然不监听回车/空格键。aaach，我将添加代码示例实现menukeylistener请查看我的编辑，测试

ButtonModel

作为我最喜欢的

XxxMenuXxx

的监听器，他们的键盘或鼠标甚至尝试应用Nimbus外观，但菜单项仍然不监听回车键/空格键。aaach，我将添加代码示例实现menukeylistener我在Mac上尝试了这段代码，效果非常好（enter和空格键都在运行操作）！但我尝试在我的代码上打印更改侦听器，enter不会触发任何更改！我也尝试了Nimbus look and feel，但“功能表”仍然不听enter！我在Mac上尝试了此代码，效果非常好（enter和空格键都在运行操作）但是我试着在我的代码上打印更改侦听器，输入不进行任何更改！我还尝试了nimBUS的外观和感觉，但是菜单仍然没有听进去。@ RoZaGH：我怀疑问题是在看不见的代码中。如果你能产生一个显示问题的话，我会试着运行它。请随意使用我的例子作为基础。弹出菜单和菜单我的代码中的项目是基于鼠标事件位置生成的，并使用“show（x，y）”方法进行调用