I need a collection that behaves something like C++ multimap, but I also need to be able to get elements by a range of keys.
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I need a collection that behaves something like C++ multimap, but I also need to be able to get elements by a range of keys.
There is no built-in multimap collection in Java. To solve this you can map to every key a list of values:
Map<String, List<String>>, for example. Otherwise there are third-party libraries with implemented multimaps – here is one of them.