New Livestream – Gatherers: The API Your Stream Was Missing

Anna Rovinskaia

March 3, 2025

Updated on March 13, 2025.

On March 13, 2025, we hosted our IntelliJ IDEA Livestream episode with José Paumard, where we explored the Stream Gatherer API in JDK 24 and how to use it effectively in your applications.

JDK 24 is bringing a new enhancement to the Stream API, called the Stream Gatherer API. Stream Gatherers are a great addition to the Stream API, bringing new possibilities and helping to solve complex problems. This presentation shows you how Gatherers work on live examples, how you can create them, and what use cases they are most suitable for. Understanding Gatherers requires a good understanding of the Stream API. At the end of this presentation, you will be able to create your own Gatherers and understand when you should use them in your application.

José will try to answer all of your questions during the session. If we run out of time, we’ll publish answers to any remaining questions in a follow-up blog post.

José PaumardCopy heading link

José works as Java Developer Advocate at Oracle and is a Java Champion alumni member and JavaOne Rockstar. He has a PhD in applied mathematics and computer science and was an assistant professor at the University Sorbonne Paris Nord for 25 years. A member of the Paris Java User Group, he has been a co-organizer of the Devoxx France conference and is a disorganizer of JChateau – an unconference held in the Châteaux of the Loire Valley. Paumard works on the dev.java documentation website, hosts the monthly YouTube video podcast JEP Café, and is a Pluralsight author in the Java space.

Mala GuptaCopy heading link

A Java Champion and JUG leader, Mala has authored multiple books with Manning, Packt, and O’Reilly Publications. She has more than two decades of experience in the software industry and is a regular speaker at industry conferences around the world. She is a vocal supporter of Java certification as a path to career advancement.

Happy developing!

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