Would it work if both action listeners of JMenuItem and JButton
called the same function to add an extra node to JTree? Because
I don't think JMenuItem and JButton can share the same action
listener. Right?

...

You need an AbstractAction, or rather, an implementation
of it.  I use them for both menus and buttons in the PhySci
software project.

The source is in the .jar file, you can find it at..
http://www.physci.org/PhySci.jar

The class that extends AbstractAction is..
physci.toolbox.ui.UserAction

HTH

--
Andrew Thompson
http://www.AThompson.info/
http://www.PhySci.org/
http://www.1point1C.org/

Hi Rui,

Create an Action (preferrably a subclass of AbstractAction).
   Action yourAction = new AbstractAction() {
        public void actionPerformed(ActionEvent e)  { /*do something*/ }
    }
Customize the Action with several properties
   yourAction.putValue(Action.NAME, ....);
   yourAction.putValue(Action.SMALL_ICON, ...);
   yourAction.putValue(Action.SHORT_DESCRIPTION, ...);
Set this action onto the menu's JMenuItem and the toolbar's JButton
   yourMenuItem.setAction(yourAction);
   yourToolButton.setAction(yourAction);
Swing will take the values provided by the putValue(...) calls as text,
icon, toolTipText
for the JMenuItem or JToolBar respectively.
Whenever the menu's JMenuItem and the toolbar's JButton is clicked,
the actionPerformed method of the Action will be called.

Regards
 Thomas

Hello!

Take a look at the javax.swing.Action interface, especially the
AbstractAction implementation. Then you can create it like this

public class NodeAction extends AbstractAction {
    public NodeAction() {
        super("Add a node");
    }

    public void actionPerformed(ActionEvent ace) {
        // add your node
    }
}

and create your components as follows:

Action a = new NodeAction();
JButton b = new JButton(a);
menu.add(a);
toolbar.add(a);

Hope this helps - Stephan

javax.swing.Action

BK