How to add a “listener” to a JList

Question

I know that JList doesn't support ActionListeners as said here , but I need to implement a list that keeps changing in the frame when new sockets connect to the server. So my question: What is the best way to implement this list?

Answer 1

DefaultListModel<String> data = new DefaultListModel<>();  //defaultlistModel

/**
adding data to jlist    **/
       data.addElement("new element");
       jList1.setModel(data);



/**action listner on data(defaultlistModel) will be called when the list is changed*/

    public void addlistner(){


    data.addListDataListener(new ListDataListener() {
        @Override
        public void intervalAdded(ListDataEvent e) {
            throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
        }

        @Override
        public void intervalRemoved(ListDataEvent e) {
            throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
        }

        @Override
        public void contentsChanged(ListDataEvent e) {
            System.out.println("added"+e.getIndex1());   
        }
    });

    } 

you cant do that with a jlist . but its possible with defaultListModel whenever you need to add data to the jlist . you should add your element to the defaultlistmodel and then set the model in to the jlist . and you can then write a listner to get called on changing properties in defaultListModel . take a look at my code.