> My JDK 6 documentation gives no indication that either Vector or Hashtable> as being deprecated. Rather them being retrofitted into the Collectionss> Framework at 1.2. The main difference being that as you said they are> synchronized, which a developer may wish to have for that type of data> structure.They were indeed not officially deprecated as some other things in the JDK are, but they were most definitely 'effectively' deprecated. No programmer in his or her right might has used those structures since.