Thread: How to change JTree's node icon manually?

Hi, I'm currently making messenger application using awt and swing. I've searched in google, but till now I haven't got solution.

I want to change user's status icon in the buddy list if the user's status is changed(such like offline and online).

But for now I want to try to change the icon directly by pressing a button first before thinking about listener for the status.

I have this tree

	CustomCellRenderer rosterTreeRenderer = new CustomCellRenderer();
        DefaultMutableTreeNode rosterRoot = new DefaultMutableTreeNode("root");
        DefaultMutableTreeNode rosterGroup = null;
 
	    rosterGroup = new DefaultMutableTreeNode("group 1");
	    rosterRoot.add(rosterGroup);
	    rosterGroup.add(new DefaultMutableTreeNode("abc"));
	    rosterGroup.add(new DefaultMutableTreeNode("dce"));
 
	    rosterGroup = new DefaultMutableTreeNode("group 2");
	    rosterRoot.add(rosterGroup);
	    rosterGroup.add(new DefaultMutableTreeNode("zzz"));
	    rosterGroup.add(new DefaultMutableTreeNode("xxx"));
	    rosterGroup.add(new DefaultMutableTreeNode("yyy"));
 
            rosterTree.setCellRenderer(rosterTreeRenderer);

This is the cell renderer

public class CustomCellRenderer extends DefaultTreeCellRenderer
{
	private static final long serialVersionUID = 1L;
 
	public CustomCellRenderer(){
 
	}
 
        public Component getTreeCellRendererComponent( JTree tree, Object value,
		      boolean isSelected, boolean expanded, boolean leaf, int row,
		      boolean hasFocus )
	{
		DefaultMutableTreeNode node = (DefaultMutableTreeNode)value;
		String	labelText = (String)node.getUserObject();
 
		if (isSelected)
		{
			System.out.println("selected");
			this.setIcon(UIManager.getIcon("Tree.openIcon"));
			//((DefaultTreeModel) tree.getModel()).nodeChanged(node);
		}
 
 
        else if (leaf) {
            this.setIcon(UIManager.getIcon("Tree.leafIcon"));
          } else if (expanded) {
        	  this.setIcon(null);
          } else {
        	  this.setIcon(null);
          }
 
		setText(labelText);
		return this;
	}
 
    public Color getBackgroundNonSelectionColor() {
        return(null);
    }
 
    public Color getBackground() {
        return(null);
    }
}

Whenever I click the user, the user's icon change, the first phase of my testing is working.

But after that I'm confused, how can I change the icon when I click a button at the roster frame. How to invoke and send parameter to change icon of specified user? I already read DefaultTreeCellRenderer javadoc but still haven't found clue to what I wanted, most of the methods noted with "Overridden for performance reasons".

I've already searched for several days for this problem.. Hope someone can help me..

Thanks

Cross posted
How to change JTree's node icon manually? - Java Forums

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Another cross post
Swing - How to change JTree's node icon manually?

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