Collector API

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Java Collector API.

https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/stream/Collector.html

illustration of accumulative: car battery (source: pixabay)

Accumulative is an interface proposed for the intermediate accumulation type A of Collector<T, A, R> in order to make defining custom Java Collectors easier. Introduction If you’ve ever used Java Streams, you most likely used some Collectors, e.g.: Collectors.toList Collectors.toMap But have you ever used… A composed Collector? It takes […]

Original Design Proposal

Accumulative: Custom Java Collectors Made Easy

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