Best Way to store references to other objects

Hi there,
I want to design a class, that has several references to other instances. What is the best way to store such references within the class? As a vector? As a Hash-Table?
What I need are:
-get a certain element in this data-structure fast (let's say the fifth)
-be able to list all elements referenced
-delete a certain element (e.g. 5th one out of 10)
What I do not necissarily need is:
-to be able to search if a certain object is referenced by this one
What do you propose?
Any ideas?
Thx
Karlheinz Toni

Any thoughts on hashtables etc?
I used them in an application where i needed to get
objects quickly. It allowed me to get the objects
based on a criteria instead of by the object itself.
It was really useful for me.Use HashMap instead of Hashtable. HashMap would also work but you can't get element 5 unless you use the element number as a key. If you do use the element number as the key, it's kind of like using a List except it won't renumber itself, which you may or may not want. For example, if you remove element 5 from a List element 6 (if it exists) becomes element 5. If you remove key 5 from the HashMap you just don't have an element 5 anymore i.e. the map will return null for get(new Integer(5));

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