guava是否有一个采用自定义哈希/等于函数的Map实现？ [英] Does guava have a Map implementation that takes custom hash/equals functions?

问题描述

任何人都知道Guava是否与Functionaljava的具有相同的版本HashMap ？

Anyone know if Guava has an equivalent version to Functionaljava's HashMap?

推荐答案

据我所知，没有。

但您可以将所有密钥包装在 Equivalence.Wrapper 个实例/com/google/common/base/Equivalence.htmlrel =noreferrer> 等价 您需要的策略：

But you can wrap all your keys in Equivalence.Wrapper instances using the Equivalence strategy you need:

Equivalence<K> equiv = ...
Map<Equivalence.Wrapper<K>, V> map = ...

map.put(equiv.wrap(key), value);

当然，这意味着您需要为地图中的每个条目添加一个额外的对象。因此，我认为像你建议的地图实现会很好。

Of course this means you need an additional object for every entry in your map. Thus I think a map implementation like you suggest would be nice to have.

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