Java Swing: Menu Bar

[dragu_stelian]

Hello!

I have the next code.

first file

public class Main
{    
    public static void main(String[] args)
    {    
        new MyFrame();
    }
}

second file

public class MyFrame extends JFrame
{
    private MyMenuBar menu;
    private Toolbar toolbar;
    public MyFrame()
    {
        menu = new MyMenuBar();
        toolbar = new Toolbar();
        
        setJMenuBar(menu);
        
        setExtendedState(JFrame.MAXIMIZED_BOTH);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setIconImage(new ImageIcon("C:/Users/Stelian/Documents/NetBeansProjects/Main/src/main/images/apps.png").getImage());
        setVisible(true);
    }
}

third file

public class MyMenuBar extends JMenuBar
{
    public JMenu File, Books, Members, Search, Loan, Help;
    
    public JMenuItem Exit;
    public JMenuItem AddBook, ListBooks;
    public JMenuItem AddMembers, ListMembers;
    public JMenuItem SearchBooksAndMembers;
    public JMenuItem BorrowBook, ReturnBook;
    public JMenuItem About;
    
    public JMenuBar menuBar = new JMenuBar();

    public MyMenuBar()
    {
        File = new JMenu("File");
        File.setMnemonic('F');
        
        Books = new JMenu("Books");
        Books.setMnemonic('B');
        
        Members = new JMenu("Members");
        Members.setMnemonic('M');
        
        Search = new JMenu("Search");
        Search.setMnemonic('S');
        
        Loan = new JMenu("Loan");
        Loan.setMnemonic('L');
        
        Help = new JMenu("Help");
        Help.setMnemonic('H');

        Exit = new JMenuItem("Exit", new ImageIcon("C:/Users/Stelian/Documents/NetBeansProjects/Main/src/main/images/exit.png"));
        File.add(Exit);
        Exit.setMnemonic(KeyEvent.VK_E);
        Exit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F4,ActionEvent.ALT_MASK));

        AddBook = new JMenuItem("Add Books", new ImageIcon("C:/Users/Stelian/Documents/NetBeansProjects/Main/src/main/images/add.png"));
        Books.add(AddBook);
        AddBook.setMnemonic(KeyEvent.VK_B);
        AddBook.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_B,ActionEvent.CTRL_MASK));
        
        ListBooks = new JMenuItem("List All Books", new ImageIcon("C:/Users/Stelian/Documents/NetBeansProjects/Main/src/main/images/print.png"));
        Books.add(ListBooks);
        ListBooks.setMnemonic(KeyEvent.VK_L);
        ListBooks.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L,ActionEvent.CTRL_MASK));
        
        AddMembers = new JMenuItem("Add Members", new ImageIcon("C:/Users/Stelian/Documents/NetBeansProjects/Main/src/main/images/add.png"));
        Members.add(AddMembers);
        AddMembers.setMnemonic(KeyEvent.VK_A);
        AddMembers.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L,ActionEvent.CTRL_MASK));
        
        ListMembers = new JMenuItem("List All Members", new ImageIcon("C:/Users/Stelian/Documents/NetBeansProjects/Main/src/main/images/print.png"));
        Members.add(ListMembers);
        ListMembers.setMnemonic(KeyEvent.VK_L);
        ListMembers.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L,ActionEvent.CTRL_MASK));
        
        SearchBooksAndMembers = new JMenuItem("Search", new ImageIcon("C:/Users/Stelian/Documents/NetBeansProjects/Main/src/main/images/search.png"));
        Search.add(SearchBooksAndMembers);
        SearchBooksAndMembers.setMnemonic(KeyEvent.VK_S);
        SearchBooksAndMembers.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L,ActionEvent.CTRL_MASK));
        
        BorrowBook = new JMenuItem("Borrow Books", new ImageIcon("C:/Users/Stelian/Documents/NetBeansProjects/Main/src/main/images/borrow.png"));
        Loan.add(BorrowBook);
        BorrowBook.setMnemonic(KeyEvent.VK_B);
        BorrowBook.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L,ActionEvent.CTRL_MASK));
        
        ReturnBook = new JMenuItem("Return Books", new ImageIcon("C:/Users/Stelian/Documents/NetBeansProjects/Main/src/main/images/return.png"));
        Loan.add(ReturnBook);
        ReturnBook.setMnemonic(KeyEvent.VK_R);
        ReturnBook.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L,ActionEvent.CTRL_MASK));
        
        About = new JMenuItem("About", new ImageIcon("C:/Users/Stelian/Documents/NetBeansProjects/Main/src/main/images/about.png"));
        Help.add(About);
        About.setMnemonic(KeyEvent.VK_A);
        About.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L,ActionEvent.CTRL_MASK));
    }
}

The code doesn't show my menubar.
Can anyone tell me why?
Thank you!

[jcaccia]

Where are you adding the menu options (File, Book, etc) in MyMenuBar?

Please follow the Java naming conventions more consistently (variable/method names start in a lowercase letter).

[Norm]

Another possible problem is that the code has 2 menu bar object. See code with <<<<<<<:

public class MyMenuBar extends JMenuBar   <<<<<<<<<< MyMenuBar is a JMenuBar
{
    public JMenu File, Books, Members, Search, Loan, Help;
    
    public JMenuItem Exit;
    public JMenuItem AddBook, ListBooks;
    public JMenuItem AddMembers, ListMembers;
    public JMenuItem SearchBooksAndMembers;
    public JMenuItem BorrowBook, ReturnBook;
    public JMenuItem About;
    
    public JMenuBar menuBar = new JMenuBar();    <<<<<<<<<<<< another JMenuBar