Java 8 Distinct by property

Question

In Java 8 how can I filter a collection using the Stream API by checking the distinctness of a property of each object?

For example I have a list of

Answer 1

I recommend using Vavr, if you can. With this library you can do the following:

io.vavr.collection.List.ofAll(persons)
                       .distinctBy(Person::getName)
                       .toJavaSet() // or any another Java 8 Collection