title: Java: How to update custom ListCellRenderer?
body: <p>I implemented my own ListCellRenderer for my chat app. I use a JList to list all users. The cell renderer consists mainly of an icon that displays if a particular user is currently on- or offline and his/her name. The list is controlled by a DefaultListModel which I use to provide the JList with the necessary information.</p>
  
  <p>But when the list model does change its state (e.g. a user goes offline), the list cell renderer seems not to be invoked?</p>
  
  <p>Somebody any idea how to solve this problem? Tried to call updateUI() on the JList instance, but did not helped.</p>
  
  <p>Many thanks in advance!</p>