Java CountDownLatch.await(long, TimeUnit) is a method in the Java CountDownLatch class that blocks the calling thread until the latch reaches zero, or the specified time has elapsed. It allows for specifying a timeout for waiting, providing better control over concurrency. Introduced in Java 2004 with Java 5, await() is essential for synchronizing parallel tasks and controlling thread execution in concurrent programming.

https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CountDownLatch.html