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Groups > comp.lang.java.programmer > #6265

Generics for a multiplevalue hashmap

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Hello,

I want to create a HashMap which has a list for each key. Therefore I can store more than one value for each key. (I know this breaks the true use of a hashmap but I want a datastruture that takes one key and hold multiple value)

I thought I would be able to define:

public class MultipleValueHashMap<T, java.util.List<U>> implements Map<T, java.util.List<U>> {

....
}

I would then construct it by "new MultipleValueHashMap<Inteteger, List<String>()"

Unfortunately this does not compile. I think it might be because I am mixing generic types with real types. Am I correct?

Is there a way I can use a map to store more than one value and use generics?

Thanks

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Generics for a multiplevalue hashmap Alexis Berry <iamrichardjones@gmail.com> - 2011-07-18 14:31 -0700
  Re: Generics for a multiplevalue hashmap markspace <-@.> - 2011-07-18 14:40 -0700
  Re: Generics for a multiplevalue hashmap Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-07-18 21:00 -0300
  Re: Generics for a multiplevalue hashmap Arne Vajhøj <arne@vajhoej.dk> - 2011-07-18 23:01 -0400
  Re: Generics for a multiplevalue hashmap Roedy Green <see_website@mindprod.com.invalid> - 2011-07-19 03:59 -0700
  Re: Generics for a multiplevalue hashmap Esmond Pitt <esmond.pitt@bigpond.com> - 2011-07-19 22:24 +1000
    Re: Generics for a multiplevalue hashmap markspace <-@.> - 2011-07-19 08:31 -0700

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