Java Streams: Beyond The Basics
summary
Covers practical JDK 8+ techniques: lambda type inference, avoiding eager work by using a logger supplier instead of building messages, and preferring stream operations over shared mutable state (don’t use LongAdder inside forEach; use mapToInt(...).sum()). Shows naive recursive and sort-based approaches for “longest line” replaced by reduce/max for longest line, explains files.lines memory‑map parallelism in JDK 9, Optional.stream, flatMapping collectors, and takeWhile/dropWhile caveats.
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chapters (22)
- 0:00Introduction
- 1:48My background
- 2:30Recap
- 4:05Type Inference
- 6:31Functional Interface
- 11:06Stream Sources
- 13:18Delayed Execution
- 13:33Uncertainty Principle
- 15:03Suppliers
- 17:09Avoiding Loops
- 19:05Example
- 25:44Peek
- 26:39Side effects
- 27:27Exercise
- 34:37Streams Approach
- 36:50Reduce Method
- 38:06Max Method
- 38:45JDK 9 Updates
- 41:18Network Interface Updates
- 41:48Files Dot Lines
- 43:26Stream Take While
- 44:58Drop While
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