java - get selected value of defaultlistmodule

Question

OK so I'm trying to get the value of the selected of JList and I tried reading the API... I am using a DefaultListModule to store whats in my JList...

public DefaultListModel model = new DefaultListModel();

and a JList

public JList list;

and here is how I add:

model.addElement("Testing for this example");

and here is where I get NullPointerException:

Object dropped = model.getElementAt(list.getSelectedIndex());

and here is how I set-up my JLIST

    list = new JList(model);
    list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    list.addMouseListener(this);

Answer 1

If you get a NullPointerException either model or list is null. Since you postet the initialization of the model I'd guess that you didn't initialize the list itself.

public JList list = new JList(model);

Also make sure that getSelectedIndex doesn't return -1.