(java 功能代码) java 去除List 重复数据之基本数据类型

// 删除ArrayList中重复元素 

public static void 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); 
       }  
      }  
    }  
    System.out.println(list); 
} 

public static void removeDuplicate(List list) { 
      HashSet h = new HashSet(list); 
      list.clear(); 
      list.addAll(h); 
      System.out.println(list); 
} 

public static void removeDuplicateWithOrder(List list) { 
     Set set = new HashSet(); 
      List newList = new ArrayList(); 
   for (Iterator iter = list.iterator(); iter.hasNext();) { 
          Object element = iter.next(); 
          if (set.add(element)) 
             newList.add(element); 
       }  
      list.clear(); 
      list.addAll(newList); 
     System.out.println( " remove duplicate " + list); 
}