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Function to gather values of a Jlist

I have a class file named Projects that has a jbutton called emails. When the user clicks the button it pops up a Email dialog window. The Email dialog is also a separate class file. In the Email dialog there is a populated list of emails and the user has the option to add or remove emails from the list. I am using a JList to store the emails.

What I am needing is a function that when the user clicks the OK button on the Email Dialog. It will get all the values of the Jlist and push it to the Projects class file. I am not sure how to do that?

CEHJ

Iterate the model of the JList. You would be better to hold a proper object type in the model

CEHJ

What type is in the model at the moment?

jkteater

ASKER

This is the model I am using. Any help you can give me would be great. I am very new at JAVA / Swing / UI stuff. I am still trying to figure out how all this works.

final SortingListModel model = new SortingListModel();

public class SortingListModel extends AbstractListModel
    {
    	TreeSet model;
        
    	private Comparator USEFUL_COMPARATOR = new Comparator()
            {
                public int compare( Object o1, Object o2 )
                {
                    String str1 = o1.toString();
                    String str2 = o2.toString();
                    Collator collator = Collator.getInstance();
                    int result = collator.compare( str1, str2 );
                    return result;
                }
            };

    public SortingListModel()
    {
        model = new TreeSet( USEFUL_COMPARATOR );
    }

    // ListModel methods
    public int getSize()
    {
        // Return the model size
        return model.size();
    }

    public Object getElementAt( int index )
    {
        // Return the appropriate element
        return model.toArray()[index];
    }

    // Other methods
    public void addElement( Object element )
    {
        
        if( model.add( element ))
        {
            fireContentsChanged( this, 0, getSize() );
        }
    }

    public void addAll( Object elements[] )
    {
        Collection c = Arrays.asList(elements);
        model.addAll(c);
        fireContentsChanged( this, 0, getSize() );
    }

    public void clear()
    {
        model.clear();
        fireContentsChanged( this, 0, getSize() );
    }

    public boolean contains( Object element )
    {
        return model.contains( element );
    }

    public Object firstElement()
    {
        // Return the appropriate element
        return model.first();
    }

    public Iterator iterator()
    {
        return model.iterator();
    }

    public Object lastElement()
    {
        // Return the appropriate element
        return model.last();
    }

    public boolean removeElement( Object element )
    {
        boolean removed = model.remove( element );
        if( removed )
        {
            fireContentsChanged( this, 0, getSize() );
        }
        return removed;
    }

 }

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CEHJ

That doesn't tell us what type you're storing

jkteater

ASKER

Sorry - Is this what are needing to know?

String[] emails = project.getEmailAddresses();

for (int i = 0; i < emails.length; ++i) {
         	     	
              model.addElement(emails[i]);      
        }

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for_yan

There is an example of removing and adding items in the JList in this link:
http://download.oracle.com/javase/tutorial/uiswing/components/list.html#mutable

(go to the section "Adding Items to and Removing Items from a List")
It even shows how to add it in different loaction within the list;
let us know if you have questions.

CEHJ

Looks like you're just storing String - looks OK

CEHJ

You just need to call iterator() on your model

jkteater

ASKER

But how would I pass the value of the jlist to a different function - would I have to create a array within the new function?

CEHJ

e.g.

Iterator<String> i = model.iterator();
	    while(i.hasNext()) {
		System.out.println(i.next());
	    }

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CEHJ

You could pass the whole model to the other class

jkteater

ASKER

Sorry for asking so many simple questions - I am just trying to understand to whole thing.
I am sure this is very simple and I am making it harder than it needs to be.

So basically in the new function for my OK button. I assumed that when the button was clicked the function (ListGather) would get the values of the Jlist and store them in a array or something like that and then somehow pass the array to the first class. So if I use the Iterator in the function instead of printing it out should I bee storing it in something?

ASKER CERTIFIED SOLUTION

CEHJ

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CEHJ

The first class can then use the Iterator code i posted to get the contents of the JList

jkteater

ASKER

That does sound like what I am looking for. Let me give it a try and get back - Thanks for hanging with me, I have a feeling I will be posting a lot of questions and this has been a great start.

CEHJ

OK. The point is - since you already have a collection, there's no need to create another container class (unless for some reason you didn't trust the code in the 'first class')

jkteater

ASKER

Great Help - Thanks

CEHJ