Help me debug when i scroll down my scrollbar

Question

had this bug for like a year now.
so i add a message to to my dlm1
then jsp1 should tell
jsp1 to expand its size immidietly to fit the message
however when i tell it to scroll down to its maximum size it does that -1 row, so its not fully scrolling down, just almost.
i was thinking that the maximum size just hadn't been updated yet but maybe i'm thinking wrong?
help please.
DefaultListModel dlm1;
JList jl1;
JScrollPane jsp1;
public synchronized void AddMessage(String message){
        System.out.println(jsp1.getVerticalScrollBar().getMaximum());
        dlm1.add(dlm1.size(),message); //increases the scrollbar maximum?
        jsp1.getVerticalScrollBar().revalidate(); //doesnt help
        jsp1.getVerticalScrollBar().validate(); //doesnt help
        JScrollBar jsb1 = jsp1.getVerticalScrollBar();
        jsb1.setValue(jsb1.getMaximum()); //scrolls down to as much as possible?
        System.out.println(jsp1.getVerticalScrollBar().getMaximum());
    }

Answer 1

Sorry i forgot there was a swing forum. Should i repost it there?
Anyways i changed the code to this and none of theese work. They do work 50% of the times but that happend with my previous code aswell.
public void AddMessage(String message){
        dlm1.add(dlm1.size(),message); //adds a message and increases the scrollbar maximum?
        jl1.ensureIndexIsVisible(jsp1.getVerticalScrollBar().getMaximum()+1);
        SwingUtilities.invokeLater( //swing seems uneccesairly tricky :(
            new Runnable(){
                public void run(){
                    jsp1.getVerticalScrollBar().setValue(jsp1.getVerticalScrollBar().getMaximum());
                        //scrolls down to as much as possible?
        jl1.ensureIndexIsVisible(jsp1.getVerticalScrollBar().getMaximum()+1);
captfoss wrote:shrug Just add a padding row at the end.I added an empty row but since scroll down works 50% of the times the result is a very skippy display :(
Edited by: ColacX on Dec 11, 2008 1:35 PM