how to remove duplicate values from arraylist

Hashmap nocommap = new hashmap ();Iterator iter = nocomhm. keyset (). iterator ();While (ITER. hasnext ()){String key = ITER. Next ();Arraylist list = (arraylist) nocomhm. Get (key );List = removeduplicatewithorder (list );Nocommap. Put (Key, list )

1. Remove duplicate string elements from the ArrayList collection (same string content)Analysis:(1) Creating a Collection Object(2) Adding multiple string elements (containing duplicates)(3) Create a new collection(4) Iterate through the old

1.ArrayList is a data structure based on dynamic array, LinkedList based on the data structure of the linked list.2. For random access get and set,arraylist is better than LinkedList, because ArrayList can be randomly positioned, and linkedlist to

Transferred from: http://blog.csdn.net/wuchuanpingstone/article/details/6678653Personal advice: The following article is an example of the way to explain ArrayList, LinkedList, but the best way is to look at the source code. In fact, ArrayList is a

Turn from: http://www.cnblogs.com/hnrainll/archive/2013/04/08/3006638.html The difference between the Set,list,map,vector,arraylist The difference between the Set,list,map,vector,arraylist Java Container---List,map,setCollection├list│├linkedlist│

Remove duplicate values from the List (three solutions)Public static void main (string [] ARGs ){String [] AR = {"DD", "C", "DD", "FF", "B", "E", "E "};Arraylist list = new arraylist ();For (INT I = 0; I List. Add (AR [I]);}System. Out. println

Linear tables, linked lists, and hash tables are common data structures. During Java Development, JDK provides a series of corresponding classes for us to implement basic data structures. These classes are in the Java. util package. This article

Java Container---List,map,setCollection├list│├linkedlist│├arraylist│└vector│└stack└setMap├hashtable├hashmap└weakhashmapThe collection interface   Collection is the most basic collection interface, and a collection represents a set of object, the

An array can hold object and basic data types, but you must specify the size of the array when you create it, and you cannot change it.Vertor is the object that is put. Vertor one-dimensional, hashmap/hashtabe two-dimensional; vertor/arraylist use

C # collection class array arraylist list hashtable dictionary stack queue1. arrays are fixed in size and cannot be scaled. Although the generic method system. array. Resize can reset the array size,However, this method re-creates an array with the