Elements not adding to JList

Question

For some reason, I can't add anything to my JList. The JList is visible but simply shows white - nothing can be selected.

List list;
DefaultListModel listModel;
//...
list = new JList();
list.setBounds(220,20,150,200);
listModel = new DefaultListModel();
listModel.addElement("ONE");
panel.add(list);

Am I missing something?

Answer 1

You never set the list's model to the ListModel you've constructed.

Answer 2

The JList is not using the listModel.

One way is to initialize the JList by specifying a ListModel to use:

DefaultListModel listModel = ...
JList list = new JList(listModel);

Then, performing changes to the listModel (such as calling addElement) will cause the changes to appear on the JList.

For more information on using JLists, the How to Use Lists lesson from The Java Tutorials is a good source.