Adding items to a list is done by creating a ListModel and adding it to the List, either when initiating a List or by using the method setModel(ListModel model). To remove an item or all items from a List, use removeItem(int index) or removeAll() methods. For example:
// Adding to a list either by using the DefaultListModel snipped code, or: .... myListModel.addItem("New Item"); // Removing is done either by: .... myListModel.removeItem(index); // or: myListModel.removeAll();