Merging two Map with Java 8 Stream API

Question

I have two (or more) Map objects. I\'d like to merge them with Java 8 Stream API in a way that values for common keys should be the maxim

Answer 1

Using StreamEx you can do:

StreamEx.of(m1, m2)
    .flatMapToEntry(x -> x)
    .grouping(IntCollector.max())