How to get the index of a JMenuItem in the JMenu?

Question

I need to find the index of a specific JMenuItem in a JMenu so I can programatically insert() a new JMenuItem right before it. How can I go about doing that?

@MadProgrammer guess you forgot adding link, here it is: [Container#getComponentZOrder(Component)](http://docs.oracle.com/javase/7/docs/api/java/awt/Container.html#getComponentZOrder%28java.awt.Component%29) — Frakcool, Sep 15 '14 at 21:40
@MadProgrammer Make it an answer if you want :) BTW: is there a reason people write `Class#method` instead of `Class.method`? Is it some kind of convention? — Aviv Cohn, Sep 17 '14 at 12:41
I use Class#method to indicate a instance method! where as Class.method indicates a static method — MadProgrammer, Sep 17 '14 at 21:04

score 2 · Accepted Answer · answered Sep 17 '14 at 21:03

2

Use Container#getComponentZOrder(Component) which should return the index position of the component within the container

answered Sep 17 '14 at 21:03

MadProgrammer

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score 1 · Answer 2 · answered Apr 15 '15 at 06:32

Here's a code sample of the same solution as suggested above:

JPopupMenu popup = new JPopupMenu();
popup.setName("popup");
JMenu jMenu= new JMenu("menu");
jMenu.setName("menu");
JMenuItem menuItem1 = new JMenuItem("sub1");
jMenu.add(menuItem1);
menuItem1.addActionListener(this);
popup.add(jMenu);

....

@Override
public void actionPerformed(ActionEvent e) {
    JMenuItem source = (JMenuItem)(e.getSource());
    try{
        JMenuItem menuItem = (JMenuItem) e.getSource(); 
        JPopupMenu popupMenu = (JPopupMenu) menuItem.getParent(); 
        Component invoker = popupMenu.getInvoker();  
        // Print MenuItem index against the total number of items
        System.out.println(popupMenu.getComponentZOrder(menuItem)+"/"+popupMenu.getComponentCount());
    }catch(Exception ex){
        ex.printStackTrace();
    }
}

score 0 · Answer 3 · answered Sep 15 '14 at 21:21

In JMenuItem action listener, get the source and do something like this..

for(int i = 0; i < jmenu.getMenuComponents().length; i++){
     if(jMenu.getMenuComponent(i) == jMenuItem ){
              // so that i is index here...
     }
}

here jMenuItem is e.getSource()

How to get the index of a JMenuItem in the JMenu?

3 Answers3