如果您创建自己的 ListModel，您应该扩展 AbstractListModel 并且在实现您的 addElement 方法时，您需要调用fire 方法(用于通知用户界面进行更新)，例如:

If you create your own ListModel you should extend AbstractListModel and when implementing your addElement method, you need to call a fire-method (for notifying the user interface for the update), like:

public void addElement(MyObject obj) {
    myArrayList.add(obj);
    fireIntervalAdded(this, myArrayList.size()-1, myArrayList.size()-1);
}

您的自定义 ListModel 应如下所示:

You custom ListModel should look something like this:

public class MyListModel extends AbstractListModel {

    private final ArrayList<MyObject> myArrayList = new ArrayList<MyObject>();

    public void addElement(MyObject obj) {
        myArrayList.add(obj);
        fireIntervalAdded(this, myArrayList.size()-1, myArrayList.size()-1);
    }

    @Override
    public Object getElementAt(int index) { return myArrayList.get(index); }

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