public void treeExpanded(TreeExpansionEvent e) {
}
}
;
TreeExpansionListener TreeExpansionListener1 = new ConcreteTreeExpansionListener();
TreeExpansionListener TreeExpansionListener2 = new ConcreteTreeExpansionListener();
TreeExpansionListener TreeExpansionListener3 = new ConcreteTreeExpansionListener();
EventListener[] listenersArray = null;
listenersArray = tree.getTreeExpansionListeners();
int initialValue = listenersArray.length;
tree.addTreeExpansionListener(TreeExpansionListener1);
tree.addTreeExpansionListener(TreeExpansionListener2);