Getting casting exception from DefaultListModel model = (DefaultListModel) list2.getModel();

Question

I'm trying to remove a item from a jListBox on java 9 I keep getting a exception saying

ClassCastException: java.desktop/javax.swing.JList$1 cannot be cast to java.desktop/javax.swing.DefaultListModel

when I call DefaultListModel model = (DefaultListModel) list2.getModel();

Program ..

    String[]  selections = { "green", "red", "orange", "dark blue" };
    JList list = new JList(names);
    list.setSelectedIndex(1);

    ListModel  model = list.getModel();

The exception goes oiff here

((DefaultListModel) model).removeElement(0);

.. ..

Answer 1

Try it this way

DefaultListModel model = (DefaultListModel) list.getModel();
int selectedIndex = list.getSelectedIndex();
if (selectedIndex != -1) {
    model.remove(selectedIndex);
}

or in your particular case

DefaultListModel model = (DefaultListModel) list.getModel();
model.removeElement(0);