A DESCRIPTION OF THE REQUEST :
In a JMenuBar containing a first JMenu with the same Mnemonic as the last JMenu, the last JMenu is selected using the keys [Alt]+[<Mnemonic>] and not the first JMenu.
Considering this a bug, I report this to you.
The enhancement could be that the firstJMenu is selected instead of the last.


JUSTIFICATION :
It is disturbing and annoying to select a JMenu from a JMenuBar and to get a wrong one selected.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The first JMenu with a Mnemonic is selected instead of the last with the same Mnemonic.

ACTUAL -
In a JMenuBar containing a first JMenu with the same Mnemonic as the last JMenu, the last JMenu is selected using the keys [Alt]+[<Mnemonic>] and not the first JMenu.


---------- BEGIN SOURCE ----------
// File with main()
package menutest;

import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JTextArea;


public class MenuTest extends JFrame {

/**
 * generated serialVersionUID
 */
  private static final long serialVersionUID = 5727487056953216993L;

  MenuTest mtMe;

  String hEIconFileName; // The filename for the Icon
  
  MenuItemListener mil;
  
  static String theTitle; // " HTML Editor " ;
  
  // components and controls
  
  JMenuBar jmb01;
    JMenu jmMenuTest;
      JMenuItem jmiMTNew;
    JMenu jmSearch;
    JMenu jmInsert;
      JMenuItem jmiPatterns;
    JMenu jmFont;
      JMenuItem jmiSetFont;
    JMenu jmHelp;
      JMenuItem jmiHelpIntro;
    JMenu jmRun;

  JTextArea jta;
  
  // ==========================================================================
  // work data
  
  // ==========================================================================
  // constructors
  
public MenuTest() {
    super();

    mtMe = this;
    
    setLayout( new BorderLayout() );
    
    theTitle = " Menu Test " ;

    jmb01 = new JMenuBar();
    setJMenuBar( jmb01 );
    
    jmMenuTest = new JMenu( theTitle );
    jmMenuTest.setMnemonic( 'M' );
    jmb01.add( jmMenuTest );
    
      jmiMTNew = new JMenuItem( " New " );
      jmiMTNew.setMnemonic( 'N' );
      jmMenuTest.add( jmiMTNew );
    
    jmSearch = new JMenu( " Search " );
    jmSearch.setMnemonic( 'S' );
    jmb01.add( jmSearch );
    
     jmInsert = new JMenu( " Insert " );
     jmInsert.setMnemonic( 'I' );
     jmb01.add( jmInsert );

       jmiPatterns = new JMenuItem( " Patterns " );
       jmiPatterns.setMnemonic( 'P' );
       jmInsert.add( jmiPatterns );

     jmFont = new JMenu( " Font " );
     jmFont.setMnemonic( 'F' );
     jmb01.add( jmFont );

       jmiSetFont = new JMenuItem( " Set Font " );
       jmiSetFont.setMnemonic( 'F' );
       jmFont.add( jmiSetFont );

    jmRun = new JMenu( " Run " );
    jmRun.setMnemonic( 'R' );
    jmb01.add( jmRun );

    jmHelp = new JMenu( " My Help " );
    jmHelp.setMnemonic( 'M' );
    jmb01.add( jmHelp );

      jmiHelpIntro = new JMenuItem( " Intro " );
      jmiHelpIntro.setMnemonic( 'I' );
      jmHelp.add( jmiHelpIntro );


    // connect MenuItems and event handling
    mil = new MenuItemListener( this );

    jmiMTNew.addActionListener( mil );
    jmiPatterns.addActionListener( mil );
    jmiSetFont.addActionListener( mil );
    jmiHelpIntro.addActionListener( mil );
    
    jta = new JTextArea(10, 40 );
    add( jta, BorderLayout.CENTER );

    
    setTitle( theTitle );
    
    pack();

    setSize( 400, 100 );
    setLocationRelativeTo( null );


    addWindowListener( new MTWdwListener() );

    // window closing
    setDefaultCloseOperation( EXIT_ON_CLOSE );

}
  // ==========================================================================

  // --- main() ---------------------------------------------------------------
public static void main(String[] args) {

MenuTest mt = new MenuTest();
mt.setVisible( true );

} // --- end method main() --------------------------------------------------

  // ========================================================================
  class MTWdwListener extends WindowAdapter {
    public void windowClosing( WindowEvent we ) {
      System.exit( 0 ); // dispose();
    }
  } // ======================================================================

} // === end class HTMLEditor =================================================

// second File ################################################
package menutest;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;

public class MenuItemListener implements ActionListener {

MenuTest mt;

MenuItemListener( MenuTest mt ) {
this.mt = mt;
}

public void actionPerformed( ActionEvent ae ) {

JMenuItem jmiSrcOfae = ( JMenuItem )ae.getSource();

if ( jmiSrcOfae == mt.jmiMTNew ) {
    JOptionPane.showMessageDialog( mt, " New not implemented " );
return;
}

if ( jmiSrcOfae == mt.jmiPatterns ) {
    JOptionPane.showMessageDialog( mt, " Insert Patterns not implemented " );
return;
}

if ( jmiSrcOfae == mt.jmiSetFont ) {
    JOptionPane.showMessageDialog( mt, " Set Font not implemented " );
return;
}

if ( jmiSrcOfae == mt.jmiHelpIntro ) {
    JOptionPane.showMessageDialog( mt, " Help Intor not implemented " );
return;
}

} // --- end method actionPreformed() ---------------------------------------

} // === end class MenuItemListener ===========================================


---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Choose another Mnemonic for the two JMenu objects