https://DevOpsCloud.io -- Cloud Monk Losang Jinpa, Ph.D., MCSE/MCT, GitOps DevOps Engineer

Java ExecutorService.shutdown() is a method in the Java ExecutorService interface that initiates an orderly shutdown in which previously submitted tasks are executed, but no new tasks will be accepted. This is used when an application has completed its use of an executor service and wishes to release resources. Introduced in Java 2004 with Java 5, shutdown() is critical for managing the lifecycle of thread pools.

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