New Concurrency Utilities in Java 8

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" summary

Java 8 adds concrete tools: CompletableFuture is a CompletionStage-based Future with dozens of fluent methods (thenApply/thenAccept/thenRun, thenCombine, allOf/anyOf), static factories (supplyAsync/runAsync) that default to a singleton ForkJoin commonPool (size = processors − 1), and cancel that does not interrupt the running task. StampedLock supplies optimistic reads with validate and fallback to pessimistic read/write. ConcurrentHashMap gains atomic computeIfAbsent/merge/forEach/search, and LongAdder/Accumulators split counters into cells to reduce contention.

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" chapters (5)

1. 0:00Start
2. 16:04reactive programming
3. 27:29key difference
4. 32:48Internals - mode
5. 38:09atomic adder

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