public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded, boolean isLeaf, int row, boolean hasFocus) {
super.getTreeCellRendererComponent(tree, value, sel, expanded, isLeaf, row, hasFocus);
// treenode holen
DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
if(node.isRoot()){
setIcon(null); // new ImageIcon("meinIcon.jpg")
return this;
}
...