Ten Common Mistakes Made in Functional Java 1
summary
A list of concrete anti-patterns and fixes for Java 8/9 functional code: avoid large block lambdas—extract a named method and use a method reference; return collections not streams because streams are single-use and lazy; don’t mutate objects inside map—return new immutable instances; avoid multiple terminal ops/forEach for side effects; mind operation order (distinct before limit) and infinite streams with parallel; prefer orElseGet vs orElse to avoid eager evaluation; handle checked exceptions by wrapping or using Either/Try (Vavr) to collect failures instead of aborting the stream.
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chapters (8)
- 0:00Introduction to Functional Java
- 2:46Lambda expression best practices
- 6:11Stream pipeline pitfalls
- 11:43Immutability and data flow
- 17:30Effective use of forEach
- 20:07Order of operations
- 26:26Optional handling techniques
- 33:55Exception handling in streams
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