[SOLVED] ArrayList to listbox

[DanielS]

I have an arraylist (of strings) that I want to transfer into the elements of a listbox. I cant seem to figure out how to do this. I am using netbeans and didnt create the listbox myself.

ArrayList arr = new ArrayList();
// populate arraylist with strings

listBox.SetListData(arr); // Wont work

listBox.SetListData(arr.ToString()); // Wont work either

[Fubarable]

sorry, but what is a listBox?

[Eranga]

You cannot add ArrayList into a list box, only Object[]. So you have to convert the ArrayList into Object[]

listBox.setListData(arr.toArray());

See what happen on the above line of code.

[Eranga]

sorry, but what is a listBox?

I think he's talking about List. In early NetBeans it's tag as ListBox

[DanielS]

You cannot add ArrayList into a list box, only Object[]. So you have to convert the ArrayList into Object[]

listBox.setListData(arr.toArray());

See what happen on the above line of code.

Thanks for the reply... I actually tried that, it says

Cannot Find Symbol
symbol: method SetListData(java.lang.Object[])
location: class javax.swing.JList

This is what is confusing me. SetListData() takes an Object[] as an argument but this fails.

[DanielS]

sorry, but what is a listBox?

Sorry, I come from the C++ world. I should have put JList.

[Eranga]

Thanks for the reply... I actually tried that, it says

Cannot Find Symbol
symbol: method SetListData(java.lang.Object[])
location: class javax.swing.JList

This is what is confusing me. SetListData() takes an Object[] as an argument but this fails.

I don't think so, it's should work. Here is a quick code segment.

    ArrayList<String> arr = new ArrayList<String>();
    arr.add("one");
    arr.add("two");
    arr.add("Three");
    
    jList1.setListData(arr.toArray());

Nothing much to do here.

[DanielS]

I don't think so, it's should work. Here is a quick code segment.

    ArrayList<String> arr = new ArrayList<String>();
    arr.add("one");
    arr.add("two");
    arr.add("Three");
    
    jList1.setListData(arr.toArray());

Nothing much to do here.

Here is my code...

private void GetEntryList()
{
    int ch;
    Dir = "H:\\Entries\\All.txt";
    FileReader fReader = null;
    String Title = "";
    ArrayList<String> arrEntries = new ArrayList<String>();
    try 
    {
        fReader = new FileReader(Dir);
    } catch (FileNotFoundException e) {e.printStackTrace();}
    do
    {
        do
        {
            try
            {
                ch = fReader.read();
                if ((char)ch == '~')
                {
                    do
                    {
                        Title += (char)ch;
                        ch = fReader.read();
                    } while ((char)ch != '{');
                    Title = Title.replace("~", "");
                    arrEntries.add(Title);
                    Title = "";
                }
            } catch(IOException e){e.printStackTrace();}
        } while(true);
    } while(true);

    lstEntries.SetListData(arrEntries.toArray()); // <--- Error Here
}

Is it the error I mentioned above.

If this should work then maybe its a problem in NetBeans (v6.5).


EDIT: I know they are infinite loops... This method is in progress.

[Eranga]

Can you show up the declaration of lstEntries?

I don't think this is an issue on NetBeans 6.5. I'm working on that version too, but no issues at all.

[DanielS]

Can you show up the declaration of lstEntries?

I don't think this is an issue on NetBeans 6.5. I'm working on that version too, but no issues at all.

I added the JList via the design editor.

    private javax.swing.JList lstEntries;

[DarrylBurke]

Java is case sensitive. Method names, by convention, start with a lowercase letter.

ergo, JList doesn't have a method SetListData.

db

[DanielS]

Java is case sensitive. Method names, by convention, start with a lowercase letter.

ergo, JList doesn't have a method SetListData.

db

I made the S in 'set' lowercase and it worked. Damn!

[Eranga]

Oh, I didn't notice that in your code segment.