arrayList 去重复

去掉重复基本代码

public ArrayList diff(ArrayList arrayNew)
     {
         try
         {
             ArrayList Array = new ArrayList();
             if (arrayNew == null)
             {
                 return Array;
             }
            // Array = arrayNew;
             for (int i = 0; i < arrayNew.size(); i++)
             {
                 for (int j = 0; j < i; j++)
                 {
                     if (arrayNew.get(j).equals( arrayNew.get(i)))
                     {
                    arrayNew.remove(i);
                    i--;
                      break;
                     }
                 }
             }
             return arrayNew;
         }
         catch (Exception ex)
         {
             return null;
         }
     }

 

公司递归查询去掉重复：

public static ArrayList<Integer> diff(ArrayList<Integer> arrayNew) {
		try {
			ArrayList<Integer> Array = new ArrayList<Integer>();
			if (arrayNew == null) {
				return Array;
			}
			if(arrayNew.size()==1){
				arrayNew.remove(0);
				return arrayNew;
			}
			// Array = arrayNew;
			for (int i = 0; i < arrayNew.size(); i++) {
				for (int j = 0; j < i; j++) {
					if (arrayNew.get(j).equals(arrayNew.get(i))) {
						arrayNew.remove(i);
						i--;
						break;
					}
				}
			}
			arrayNew.remove(0);
			System.out.println(arrayNew);
			return arrayNew;

		} catch (Exception ex) {
			return null;
		}
	}

 

评论

2 楼 pangxin12345 2011-04-08  

远程调用只能用ArrayList接受，删除重复，有些麻烦还是必须有的

1 楼 766884 2011-03-31  

真麻烦，hashSet一下就搞定了