Customizing Tree.collapsedIcon for a single JTree

Question

I know that you can change the Tree.collapsedIcon for a all JTrees in an application using Swing using the UImanager. For example:

Answer 1

If you make the assumption that TreeUI that you are using is an instance of BasicTreeUI, you can do the following:

TreeUI tui = treeInstance.getUI();
if (tui instanceof BasicTreeUI) {
  ((BasicTreeUI)tui).setCollapsedIcon(myIcon);
}