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From: lewbloch <lewbloch@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Generics for a multiplevalue hashmap
Date: Thu, 21 Jul 2011 15:30:40 -0700 (PDT)
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Arne Vajh=F8j wrote:
> Richard wrote:
>> I have done this
>
>> public class MultipleValueHashMap<T, U> =A0 implements Map<T, java.util.=
List<U>> =A0{
>
>> I want to implement Map rather than extend HashMap as per Josh Bloch's E=
ffective Java item 16.http://java.sun.com/docs/books/effective/toc.html
>
>> So I do not want to do this.
>> public class MM2<T,U> =A0extends HashMap<T, List<U>> =A0 {
>> }
>
> Note the word "favor".
>
> You should evaluate not just choose without thinking.

At the very least, consider extending java.util.AbstractMap<K,V>.

--
Lew