https://devops-monk.com/tags/forkjoinpool/Recent content in Forkjoinpool on Devops MonkHugoen-usMon, 04 May 2026 00:00:00 +0000https://devops-monk.com/tutorials/java8/parallel-streams/Mon, 04 May 2026 00:00:00 +0000https://devops-monk.com/tutorials/java8/parallel-streams/How Parallel Streams Work A parallel stream splits its source into sub-sequences, processes each sub-sequence on a separate thread, and merges the results. The mechanism is ForkJoin — specifically ForkJoinPool.commonPool(), a shared thread pool managed by the JVM. // Sequential — processes on the calling thread List<String> seq = names.stream() .map(String::toUpperCase) .collect(Collectors.toList()); // Parallel — splits work across ForkJoinPool.commonPool() List<String> par = names.parallelStream() .map(String::toUpperCase) .collect(Collectors.toList()); // Convert existing stream to parallel List<String> par2 = names.