将字符串ArrayList绑定到JList

Question

I have created a client -> server chat room system, and I have a list of currently connected users, which is currently displayed on a button click within a JTextField, this currently works fine and displays the string array. However, I have added another component to my GUI, being a JList. I have been trying to create a method called updateUserList to update the JList with the users that are connected. I have tried to use a DefaultListModel of type String, however this displays nothing in the JList and I am unsure as to why.

Below is the updateUserList method I have created:

public void updateUserList()
{
    model = new DefaultListModel<String>();
    for(String usernames : users)
        model.addElement(usernames);
    jl_users = new JList<String>(model);
}

Please note that model, usernames and jl_users are defined globally, therefore I have not included them in the post.

Answer 1

Why are you using DefaultListModel ? If you want a simply List just use it like this

public void updateUserList()
{
  jl_users = new JList<String>(users.toArray(new String[users.size()]));
}

or straight forward

 jl_users = new JList(users.toArray());