A few days ago I stumpled upon this LinkedIn post (in Spanish, but easily understandable) including this image with two solutions to the same problem: This isn’t a new topic, as the doubts about Java Streams, how they work and when to use them are very common. But I don’t think it has to do with seniority. The Streams API is not a “clever construct to hide loops” that only senior developers undestand, but probably the greatest revolution ever implemented in the Java language.