JList update/paint problem

Question

I've got some problems with updating a JList. This code adds an element to the bottom of the list and makes it visible.
Lines are added dynamicaly. It could be just 1 update a minute, but it could easely be 20 lines a split second...
Sometimes the last line is not visible (shows line before lastline). And sometimes the list goes totaly blank, until the next repaint. I think it must be a syncro ploblem between various "repaint"-threads. I already made the add function syncronized, but that didn't help.
Here's the code:
//     DEFINITIONS
JList list;
DefaultListModel model;
//     INITIALIZE
model=new DefaultListModel();
list=new JList(model);
list.setDoubleBuffered(true);     //     same with or without dbfr
add(new JScrollPane(list),BorderLayout.CENTER);
//     ADD LINE
public void add(Object obj){
     model.addElement(obj);
     list.ensureVisible(model.size()-1);
}How to solve this?

Answer 1

Just call ensureVisible(row) 2 timesThis may solve the problem, but it appears you still don't know the cause. Not sure, but this thread may help explain why you have the problem to begin with:
http://forum.java.sun.com/thread.jsp?forum=57&thread=437592