在java中vector代表什么意思？大大帮忙，一定给分

不是java没有指针么？ 问题点数：20、回复次数：8Top

1 楼Patrick_DK（我有我的调调，就是这么屌）回复于 2002-01-16 11:18:11 得分 2

vector　向量，存放对象的可变数组Top

2 楼skyyoung（路人甲）回复于 2002-01-16 11:21:20 得分 2

java.util    
  Class   Vector  
  java.lang.Object  
      |  
      +--java.util.AbstractCollection  
                  |  
                  +--java.util.AbstractList  
                              |  
                              +--java.util.Vector  
   
  All   Implemented   Interfaces:    
  Cloneable,   Collection,   List,   RandomAccess,   Serializable    
  Direct   Known   Subclasses:    
  Stack    
   
  --------------------------------------------------------------------------------  
   
  public   class   Vector  
  extends   AbstractList  
  implements   List,   RandomAccess,   Cloneable,   Serializable  
  The   Vector   class   implements   a   growable   array   of   objects.   Like   an   array,   it   contains   components   that   can   be   accessed   using   an   integer   index.   However,   the   size   of   a   Vector   can   grow   or   shrink   as   needed   to   accommodate   adding   and   removing   items   after   the   Vector   has   been   created.  
   
  Each   vector   tries   to   optimize   storage   management   by   maintaining   a   capacity   and   a   capacityIncrement.   The   capacity   is   always   at   least   as   large   as   the   vector   size;   it   is   usually   larger   because   as   components   are   added   to   the   vector,   the   vector's   storage   increases   in   chunks   the   size   of   capacityIncrement.   An   application   can   increase   the   capacity   of   a   vector   before   inserting   a   large   number   of   components;   this   reduces   the   amount   of   incremental   reallocation.    
   
  As   of   the   Java   2   platform   v1.2,   this   class   has   been   retrofitted   to   implement   List,   so   that   it   becomes   a   part   of   Java's   collection   framework.   Unlike   the   new   collection   implementations,   Vector   is   synchronized.  
   
  The   Iterators   returned   by   Vector's   iterator   and   listIterator   methods   are   fail-fast:   if   the   Vector   is   structurally   modified   at   any   time   after   the   Iterator   is   created,   in   any   way   except   through   the   Iterator's   own   remove   or   add   methods,   the   Iterator   will   throw   a   ConcurrentModificationException.   Thus,   in   the   face   of   concurrent   modification,   the   Iterator   fails   quickly   and   cleanly,   rather   than   risking   arbitrary,   non-deterministic   behavior   at   an   undetermined   time   in   the   future.   The   Enumerations   returned   by   Vector's   elements   method   are   not   fail-fast.    
   
   
   
  Since:  
  JDK1.0    
  See   Also:  
  Collection,   List,   ArrayList,   LinkedList,   Serialized   Form  
  Top

3 楼zero_wgh（traffic_light）回复于 2002-01-16 11:25:58 得分 2

一数据结构，类似与数组，但其长度可变Top

4 楼bookbobby（书呆）回复于 2002-01-16 11:25:59 得分 4

表示矢量  
   
  可以用来代替数组  
   
  主要不同是vector的长度可以自动增长  
   
  而数组不行Top

5 楼liukuncn（爱，还记得么？）回复于 2002-01-16 11:47:10 得分 2

普通数组长度不可变，而vector长度可变，但它只能存储对象Top

6 楼wuhuafu（）回复于 2002-01-16 14:24:02 得分 4

类似于集合。可作为动态数组使用。可以存储任何内容，同一个Vector可以存储Integer,String,以及任何类（包括Vector）。可以实现复杂的数据结构  
  为了存储一个简单类型，需要转为一个对象,eg:int->IntegerTop

7 楼wuhuafu（）回复于 2002-01-16 14:25:43 得分 2

可以说java的应用是安全指针！Top

8 楼night_knight（黑夜骑士只抽红河）回复于 2002-01-16 15:39:15 得分 2

象hashmapTop

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• vector
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