我在 OSX 上使用 Netbeans 8.1 创建了一个小型应用程序。它只包含两个菜单“文件”和“编辑”。目的是稍后在编辑菜单中添加完整的复制/剪切/粘贴功能。我想使用 Netbeans GUI builder，但遇到以下问题：
第一次尝试：
我用 Netbeans GUI builder (Swing GUI Forms -> JDialog) 创建了一个小例子。我刚刚在 JFrame 中添加了一个菜单栏，在 GUI 构建器中添加了一个 JMenuItem，并在构造函数中添加了一些代码。结果是：
如您所见，我得到一个文本“元”而不是 Apple 键“⌘”。
源代码是NewJDialogGUI.java：
import java.awt.Toolkit;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.KeyStroke;
import javax.swing.text.DefaultEditorKit;
public class NewJDialogGUI extends javax.swing.JDialog {
private static final int MASK
= Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
public NewJDialogGUI(java.awt.Frame parent, boolean modal) {
super(parent, modal);
initComponents();
AbstractAction copyAction = new DefaultEditorKit.CopyAction();
copyAction.putValue(Action.ACCELERATOR_KEY,KeyStroke.getKeyStroke(KeyEvent.VK_C, MASK));
this.jMenuItem1.setAction(copyAction);
this.jMenuItem1.setText("Copy");
this.jMenuItem1.setMnemonic(KeyEvent.VK_C);
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jMenuBar1 = new javax.swing.JMenuBar();
jMenu1 = new javax.swing.JMenu();
jMenu2 = new javax.swing.JMenu();
jMenuItem1 = new javax.swing.JMenuItem();
setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
jMenu1.setText("File");
jMenuBar1.add(jMenu1);
jMenu2.setText("Edit");
jMenuItem1.setText("jMenuItem1");
jMenu2.add(jMenuItem1);
jMenuBar1.add(jMenu2);
setJMenuBar(jMenuBar1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 400, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 278, Short.MAX_VALUE)
);
pack();
}// </editor-fold>
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(NewJDialogGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(NewJDialogGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(NewJDialogGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(NewJDialogGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the dialog */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
NewJDialogGUI dialog = new NewJDialogGUI(new javax.swing.JFrame(), true);
dialog.addWindowListener(new java.awt.event.WindowAdapter() {
@Override
public void windowClosing(java.awt.event.WindowEvent e) {
System.exit(0);
}
});
dialog.setVisible(true);
}
});
}
private javax.swing.JMenu jMenu1;
private javax.swing.JMenu jMenu2;
private javax.swing.JMenuBar jMenuBar1;
private javax.swing.JMenuItem jMenuItem1;
}
和NewJDialogGUI.form：
<?xml version="1.0" encoding="UTF-8" ?>
<Form version="1.3" maxVersion="1.9" type="org.netbeans.modules.form.forminfo.JDialogFormInfo">
<NonVisualComponents>
<Menu class="javax.swing.JMenuBar" name="jMenuBar1">
<SubComponents>
<Menu class="javax.swing.JMenu" name="jMenu1">
<Properties>
<Property name="text" type="java.lang.String" value="File"/>
</Properties>
</Menu>
<Menu class="javax.swing.JMenu" name="jMenu2">
<Properties>
<Property name="text" type="java.lang.String" value="Edit"/>
</Properties>
<SubComponents>
<MenuItem class="javax.swing.JMenuItem" name="jMenuItem1">
<Properties>
<Property name="text" type="java.lang.String" value="jMenuItem1"/>
</Properties>
</MenuItem>
</SubComponents>
</Menu>
</SubComponents>
</Menu>
</NonVisualComponents>
<Properties>
<Property name="defaultCloseOperation" type="int" value="2"/>
</Properties>
<SyntheticProperties>
<SyntheticProperty name="menuBar" type="java.lang.String" value="jMenuBar1"/>
<SyntheticProperty name="formSizePolicy" type="int" value="1"/>
<SyntheticProperty name="generateCenter" type="boolean" value="false"/>
</SyntheticProperties>
<AuxValues>
<AuxValue name="FormSettings_autoResourcing" type="java.lang.Integer" value="0"/>
<AuxValue name="FormSettings_autoSetComponentName" type="java.lang.Boolean" value="false"/>
<AuxValue name="FormSettings_generateFQN" type="java.lang.Boolean" value="true"/>
<AuxValue name="FormSettings_generateMnemonicsCode" type="java.lang.Boolean" value="false"/>
<AuxValue name="FormSettings_i18nAutoMode" type="java.lang.Boolean" value="false"/>
<AuxValue name="FormSettings_layoutCodeTarget" type="java.lang.Integer" value="1"/>
<AuxValue name="FormSettings_listenerGenerationStyle" type="java.lang.Integer" value="0"/>
<AuxValue name="FormSettings_variablesLocal" type="java.lang.Boolean" value="false"/>
<AuxValue name="FormSettings_variablesModifier" type="java.lang.Integer" value="2"/>
</AuxValues>
<Layout>
<DimensionLayout dim="0">
<Group type="103" groupAlignment="0" attributes="0">
<EmptySpace min="0" pref="400" max="32767" attributes="0"/>
</Group>
</DimensionLayout>
<DimensionLayout dim="1">
<Group type="103" groupAlignment="0" attributes="0">
<EmptySpace min="0" pref="278" max="32767" attributes="0"/>
</Group>
</DimensionLayout>
</Layout>
</Form>
第二次尝试：
我用 Netbeans GUI builder 创建了另一个小例子（Swing GUI Forms -> Application sample form）。结果是：
与第一次尝试相同的结果。
第三次尝试：
最后，我使用 Netbeans（空 Java 文件）创建了一个示例，其源代码从此处稍作修改。结果是：
源代码是：
import java.awt.EventQueue;
import java.awt.Toolkit;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.text.DefaultEditorKit;
/**
* @see https://stackoverflow.com/a/34830519/230513
*/
public class NewEmptyGUI {
private static final int MASK = Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
private void display() {
JFrame f = new JFrame("Test");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JMenuBar menuBar = new JMenuBar();
JMenu menu = new JMenu("Edit");
menu.setMnemonic(KeyEvent.VK_E);
JMenuItem menuItem = new JMenuItem();
AbstractAction copyAction = new DefaultEditorKit.CopyAction();
copyAction.putValue(Action.ACCELERATOR_KEY,
KeyStroke.getKeyStroke(KeyEvent.VK_C, MASK));
menuItem.setAction(copyAction);
menuItem.setText("Copy");
menu.add(menuItem);
menuBar.add(menu);
f.setJMenuBar(menuBar);
f.add(new JTextField(10));
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new NewEmptyGUI().display();
}
});
}
}
这是预期的结果，但整个菜单基础设施是手动编码的，这不是我的意图。我想使用 Netbeans GUI Builder。你对我有什么提示吗？
我正在使用 JDK7 和 OSX Yosemite。外观和感觉是“Nimbus”。我在这里只粘贴示例代码或第一次和第三次尝试，因为它的代码非常多。