わかりました、おそらく何かが欠けていますが、これを非常に迅速にハックして問題はありません
public class PopupFrame extends javax.swing.JFrame {
/**
* Creates new form PopupFrame
*/
public PopupFrame() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jMenuBar1 = new javax.swing.JMenuBar();
mnuFile = new javax.swing.JMenu();
jMenuItem1 = new javax.swing.JMenuItem();
jMenuItem2 = new javax.swing.JMenuItem();
jMenuItem3 = new javax.swing.JMenuItem();
jMenuItem4 = new javax.swing.JMenuItem();
jMenuItem5 = new javax.swing.JMenuItem();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(java.awt.event.MouseEvent evt) {
doMouseClicked(evt);
}
public void mouseReleased(java.awt.event.MouseEvent evt) {
doMouseClicked(evt);
}
public void mouseClicked(java.awt.event.MouseEvent evt) {
doMouseClicked(evt);
}
});
mnuFile.setText("File");
jMenuItem1.setText("New");
jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
doActionPerformed(evt);
}
});
mnuFile.add(jMenuItem1);
jMenuItem2.setText("Open");
jMenuItem2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
doActionPerformed(evt);
}
});
mnuFile.add(jMenuItem2);
jMenuItem3.setText("Save");
jMenuItem3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
doActionPerformed(evt);
}
});
mnuFile.add(jMenuItem3);
jMenuItem4.setText("Close");
jMenuItem4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
doActionPerformed(evt);
}
});
mnuFile.add(jMenuItem4);
jMenuItem5.setText("Exit");
jMenuItem5.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
doActionPerformed(evt);
}
});
mnuFile.add(jMenuItem5);
jMenuBar1.add(mnuFile);
setJMenuBar(jMenuBar1);
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 400, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 278, Short.MAX_VALUE)
);
pack();
}// </editor-fold>
private void doActionPerformed(java.awt.event.ActionEvent evt) {
JMenuItem mi = (JMenuItem) evt.getSource();
JOptionPane.showMessageDialog(this, "Clicked " + mi.getText());
}
private void doMouseClicked(java.awt.event.MouseEvent evt) {
if (evt.isPopupTrigger()) {
JPopupMenu popupMenu = mnuFile.getPopupMenu();
popupMenu.show(this, evt.getX(), evt.getY());
}
}
/**
* @param args the command line arguments
*/
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(PopupFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(PopupFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(PopupFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(PopupFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/*
* Create and display the form
*/
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new PopupFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JMenuBar jMenuBar1;
private javax.swing.JMenuItem jMenuItem1;
private javax.swing.JMenuItem jMenuItem2;
private javax.swing.JMenuItem jMenuItem3;
private javax.swing.JMenuItem jMenuItem4;
private javax.swing.JMenuItem jMenuItem5;
private javax.swing.JMenu mnuFile;
// End of variables declaration
}
申し訳ありませんが、生後 3 か月の子供が昼寝をしている間に組み立てなければならなかったので、手早くて醜い :P
アップデート
いろいろ試してみたところ、ポップアップを自分で呼び出したときに、ポップアップの親参照 ( invoker) を変更していたようです。つまり、ポップアップJMenuを表示しようとすると、コンテキストがすべて間違っていました。
doActionPerformedメソッドを次のように更新しました。
JOptionPane.showMessageDialog(this, "Clicked " + mi.getText());
JPopupMenu popupMenu = mnuFile.getPopupMenu();
popupMenu.setInvoker(mnuFile);
基本的に、ポップアップのクライアント参照を休ませます。