JMenuItem not showing up.

JMenu menu;
JMenuBar menuBar = new JMenuBar();
JMenuItem menuItem;
menu = new JMenu("File");
menuBar.add(menu);
menuItem = menu.add(new JMenuItem("Exit"));
menuItem.addActionListener(new ExitActionListener());
setJMenuBar(menuBar);
When I click on "File", I don't see the "Exit" option at all. Any ideas? Thanks....

Don't know why. I took your code snipet and stuck it in one of my programs and it worked fine.
Just had to comment out the ActionListener bit.

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I would like to have a popup menu with actions that are enabled after they have finished with some background task taking some time. Basically this works fine for the enabling action on a shown popup. However, adding an animated gif as the icon or disabled icon does not show it in disabled state. In enabled state it works perfect. Please have a try with the sample code. You should see the disabled item for 2 secs and the icon is not showing up. After being enabled, it does. Invoking the menu again shows the animated gif in its last state left, but not moving any more.
I guess, repaints are not done appropriately in disabled state... Any ideas how to solve that would be highly appreciated :-)
Actually I used the icon at http://mentalized.net/activity-indicators/indicators/pascal_germroth/indicator.white.gif
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        SwingUtilities.invokeLater(new Runnable()
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            try
              Thread.sleep(2000);
              action.setEnabled(true);
            catch (InterruptedException e1)
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(300, 200);
    frame.setVisible(true);
}Edited by: daniel.frey on Apr 22, 2009 7:50 AM

The problem is that you are causing the EDT to sleep, which means the GUI can't repaint itself. Read the section from the Swing tutorial on Concurrency to understand what is happening.

The JPanel did not show when the menu is selected

My program consists a JMenu bar with sub menu items. When the user select on the menu items a panel with the gridbag layout will show with all the labels.but the panel did not show. Can anyone show the problem for me ?
AdminFrameMain.java
public class AdminFrameMain
     private DisplayMenuBar menubar;
     private DisplayToolBar toolbar;
     private DisplayStatusBar statusbar;
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     private JMenuBar bar = new JMenuBar();
     private JToolBar toolbar = new JToolBar();
     private JMenuItem addTeamItem;
     private JFrame setFrame;
     private Container setContent;
     private AddTeamManagement addTeamMang;
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          setContent = c;
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     addMenu = new JMenu("Add");
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     addTeamMenu.setMnemonic('T');
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     addTeamItem.addActionListener(new ActionListener()
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               AddTeamManagement addTeamMang = new AddTeamManagement(setFrame,setContent);
     bar.add(addMenu);
AddTeamManagement.java
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     private JLabel teamID,teamDesc,teamInfo,numOfPlayers,teamZone,playersNum;
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          addTeamContent = c;
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          teamDesc = new JLabel("Team Description:");
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          constraints.weightx = 1;
          constraints.weighty = 0;
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          constraints.fill = constraints.VERTICAL;
          constraints.weightx = 1;
          constraints.weighty = 0;
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          constraints.fill = constraints.VERTICAL;
          constraints.weightx = 1;
          constraints.weighty = 0;
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Hello,
you are missing only one link, just add following line to your actionPerformed method of DisplayMenuBar class and all problem will be solved
setContent.validate();
Actually, Swing component does not updated automatically. when you do any changes to the component layout it will set that component as invalidated component. To update the view you need to call validate() method defined in JComponent class.
Virus

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JMenuItem not showing up.

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