How to update the string name of an item inside a DefaultListModel [duplicate]

Question

This question already has answers here:

Java - Updating JList after changing an object (3 answers)

Closed 8 years ago.

I have a Jlist with a DefaultListModel with data from XML.

I want to be able change the name of the item in the Jlist. but the DefaultListModel has no update method.

So if the user clicks on a name it should edit the name.

So far I thought if I get the location of the item and remove it and update with new data. But if I update with then new name will it be put in the same location as the old or will things be messed up ?

My code :

private class EditName extends AbstractAction {
        public EditName() {
            putValue(NAME, "Change Name");
            putValue(SHORT_DESCRIPTION, "Some short description");
        }

        public void actionPerformed(ActionEvent e) {

             int x = objTypeJList.getSelectedIndex();
               String newName = JOptionPane.showInputDialog("New Name?");

                 if (x >= 0) {
                   String oldName = ReadXMLFile.getInstance().getModel().getElementAt(x).toString();
                   ReadXMLFile.getInstance().getModel().removeElementAt(x);
                   objTypeJList.setModel(ReadXMLFile.getInstance().getModel());
                }
                    // newText I wanna add into the the location I edit
            }

    }

Answer 1

"I want to be able change the name of the item in the Jlist. but the DefaultListModel has no update method."

What makes you say that? Have you looked carefully at the docs ?

What do you think this method does?

• public void setElementAt(E element, int index) - Sets the component at the specified index of this list to be the specified element. The previous component at that position is discarded.

OR

• public E set(int index, E element) - Replaces the element at the specified position in this list with the specified element.