From Sun's AWT tutorial

Menu functionality in the AWT is provided by several classes. These classes do not inherit from Component, since many platforms place severe limits on menu capabilities. Instead, menu classes inherit from the MenuComponent class.

To be able to contain a MenuComponent, an object must adhere to the MenuContainer interface. The Frame, Menu, and MenuBar classes are the only AWT classes that currently implement MenuContainer.

In order to verify what is said in the Tutorial, I extracted the source code for both 'Component' and 'Frame' classes. I found that eventhough the documentation for 'Component' class in the API and in the source code also says 'implements MenuContainer', internally ONLY the 'Frame' class FULLY /gives TRUE implemetation for the remove(MenuComponent m) method from the MenuContainer interface. The class Component gives partial implementation of the MenuComtainer interface. Partial implementation in the sense, Component class is implemnted to remove ONLY PopupMenu NOT All MenuComponents.

And also as you told, Only Frame has got a method setMenuBar(MenuBar m) to attach a menu. All decendents from Component class have only add(Component c) related methods. Since the java.awt.MenuComponent hirearchy is COMPLETELY a DIFFERENT branch we can't attach a MEnuComponent to a Component. This also adds to our argument of Only Frames can have Menu bars .

So for your qstns we have to select only Frame.

regds
maha anna

The source code for MenuContainer interface
------------------------------------------------

public interface MenuContainer {
    Font getFont();
    void remove(MenuComponent comp);
    boolean postEvent(Event evt);
}

    public synchronized void remove(MenuComponent popup) {
        if (popups != null) {
	    int index = popups.indexOf(popup);
	    if (index >= 0) {
	        PopupMenu pmenu = (PopupMenu)popup;
	        if (pmenu.peer != null) {
		    pmenu.removeNotify();
		}
		pmenu.parent = null;
		popups.removeElementAt(index);
		if (popups.size() == 0) {
		    popups = null;
		}
	    }
	}
    }

  public void remove(MenuComponent m) {
	synchronized (getTreeLock()) {
	    if (m == menuBar) {
		menuBar = null;
		FramePeer peer = (FramePeer)this.peer;
		if (peer != null) {
		    mbManagement = true;
		    if (valid) {
		        invalidate();
		    }
		    peer.setMenuBar(null);
		    m.removeNotify();
		}
		m.parent = null;
	    } else {
		super.remove(m);
	    }
	}
    }