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

Another solution, using Set. May not be the ideal solution, but it works

Set set = new HashSet<>(persons.size());
persons.stream().filter(p -> set.add(p.getName())).collect(Collectors.toList());

Or if you can modify the original list, you can use removeIf method

persons.removeIf(p -> !set.add(p.getName()));