list删除重复记录

两种比较实用的方法，一个是双循环，一个是hashset.

一.循环

public   static   List  removeDuplicate(List list)  {     for  ( int  i  =   0 ; i  <  list.size()  -   1 ; i ++ )  {         for  ( int  j  =  list.size()  -   1 ; j  >  i; j -- )  {              if  (list.get(j).equals(list.get(i)))  {                 list.remove(j);               }            }          }        return list;   } 

二.hastset

public   static   List  removeDuplicate(List list)  {       HashSet h  =   new  HashSet(list);       list.clear();       list.addAll(h);       return list;    }