How to convert ArrayList into JList object? java [duplicate]

问题

This question already has answers here:

how to bind ArrayList to JList (5 answers)

Closed 3 years ago.

I have an ArrayList that gets larger as more users join a chatroom. The main JFrame has a list box that displays all currently connected users. But when i try to pass the arraylist into the jframe list i get this following error:

"The method setListData(Object[]) in the type JList is not applicable for the arguments (ArrayList)"

Thanks for your time.

回答1:

You could simply use setListData(arrayList.toArray())

Or you could write your own ListModel, which is backed by the ArrayList, for example...

public class ListBasedListModel<T> extends AbstractListModel<T> {

    private List<T> data;

    public ListBasedListModel(List<T> data) {
        this.data = data;
    }

    @Override
    public int getSize() {
        return data.size();
    }

    @Override
    public T getElementAt(int index) {
        return data.get(index);
    }
}

Then you could just do list.setModel(new ListBasedListModel(arrayList)) or some such

Have a look at How to Use Lists for more details

回答2:

JList myJList = new JList(arrayList.toArray()); //arrayList should be your Array List

回答3:

JList delList = new JList(myArrayList.toArray());

来源：https://stackoverflow.com/questions/34847496/how-to-convert-arraylist-into-jlist-object-java