Streams in JDK 8: The Good, the Bad, and the Ugly

Great session in JavaOne 2017 about Streams and lambdas introduced in JDK8.

The session shows many examples of Java code using forEach() with side effects and how to refactor them to a functional approach using streams and the Collectors API.

What are your experiences using Streams and lambdas in JDK 8? Are you correctly using the Collectors API?

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