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What is the best way to filter a Java Collection?

Anonymous User 1706 07-Aug-2015

I want to filter a java.util.Collection based on a predicate.

java collection

Updated on 07-Aug-2015

I am a content writter !

Can you answer this question?

Answer

07-Aug-2015

lambdaj allows to filter collections without writing loops or inner classes as in the following example:

List<Person> beerDrinkers = select(persons, having(on(Person.class).getAge(), greaterThan(16)));

Can you imagine something more readable? You can find it here:

http://code.google.com/p/lambdaj/

With Java 8 update (2014) comes streams and lambdas, solving this problem with a simple one-liner:

List<Person> beerDrinkers = persons.stream()
    .filter(p -> p.getAge() > 16).collect(Collectors.toList());