如何将多个值存储到一个键(java) [英] How to store several values to one key (java)

问题描述

我搜索一个数据结构，可以在其中存储几个键值对.

I search for a datastructure, where I can store several key-value pairs.

数据本质上是这样的:

(1 , value_1)
(2 , value_2)

所以我想到了使用HashMap.遗憾的是，这对我不起作用，因为一个键可能会出现多个值.

So I thought of using HashMap. Sadly this won't work for me, because multiple values to one key can occur.

(在上面的示例中:

(1 , value_2)

可能是另一个条目

除了用新的Object或类似的东西创建一个List之外，还有什么方法可以有效地存储这些数据.

Is there any way of performantly storing this data, except creating a List with a new Object or something like this.

get(1)

应将value_1和value_2作为列表或集合或类似内容返回.

should return value_1 and value_2 as a list or set or anything similar.

预先感谢

推荐答案

我认为您要查找的数据结构位于Google的番石榴库MultiMap中.参见 http://guava-libraries.googlecode .com/svn-history/r13/trunk/javadoc/com/google/common/collect/Multimap.html .

I think the data strucure you're looking for is in google's guava library, MultiMap. See http://guava-libraries.googlecode.com/svn-history/r13/trunk/javadoc/com/google/common/collect/Multimap.html.

基本上是Map<K,Collection<V>>，但具有易于使用的界面.

Basically it's a Map<K,Collection<V>> but with an easier to use interface.

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