Java怎么用Comparator中怎么实现文件夹的排序？

Collections.sort(treeNodeList, new Comparator(){
@Override
public int compare(Object o1, Object o2) {
TreeNodeForPage a = (TreeNodeForPage)o1;
TreeNodeForPage b = (TreeNodeForPage)o2;
a.getName();
return 0;
}
} );

怎么比较name ，排序

return a.getName().compareTo(b.getName());