java ArrayList Sorting type

   String[]   sArray   =   new   String[]{"z","a",C"};  
  List   list   =   Array.aslist(sArray);  
   
  Collection.sort(list);//结果为C   a   z  
  Collection.sort(list,String.CASE_INSENSITIVE_ORDER);//结果为a   C   z  
  Collection.sort(list,Collections.reverseOrder());//z,a,C  
  Collection.sort(list,String.CASE_INSENSITIVE_ORDER);  
  Collection.reverse(list);//z,C,a