In 2014, JDK 8 introduced the Stream API, bringing a taste of functional programming to Java. 11 years later, in 2025, with the release of JDK 24, the biggest change awaits us in the form of JEP 485 - Stream Gatherers.
Do streams make sense (spoiler: yes!), what benefits do gatherers bring, when is it worth using parallel streams, and when can they get in our way – these and other questions will be answered while writing the code.

JEurope 2025, Javeloper 2025