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Java's concurrent utility classes (JUC) provide ready-to-use concurrency control capabilities, avoiding the need to reinvent the wheel. The CountDownLatch, CyclicBarrier, Semaphore, and Exchanger are the most essential four. This article will explain each tool from core purpose, underlying mechanism, use cases, and code examples to help you und ...

Multithreading 1. Concepts: Process and Thread A process refers to an actively executing program instance. A thread acts as a single execution path within a process, handling the sequential execution of code segments. All application code runs within threads; by default, a JVM launches a main thread to start execution. Single-threaded execution ...