{
Itree node = (Itree)parentElement; List list = node.getChildren();
if(list == null){ return new Object[0];
} return list.toArray(); } public boolean hasChildren(Object element) { Itree node = (Itree)element; List list = node.getChildren(); return !(list == null || list.isEmpty()); } //以下三个函数根据需要填充 public Object getParent(Object element) { return null; }
