Java Multithreading Mastery #7 — Understanding Thread.join() (How One Thread Waits for Another)

A beginner-friendly deep dive into Java's Thread.join() method, explaining how it allows one thread to wait for another to complete. Covers the WAITING vs TIMED_WAITING states, timed join with a timeout parameter, waiting for multiple threads sequentially, behavior when the target thread has already terminated, and a comparison with Thread.sleep(). Includes code examples, ASCII flow diagrams, real-world use cases, and common interview questions.