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

Java CallableFuture is a concept where tasks are submitted using Java ExecutorService and are executed asynchronously, returning a Java Future that can hold the result of a computation performed by a Java Callable. CallableFuture is used in scenarios where the task returns a result or throws an exception, in contrast to the Java Runnable interface, which does not return a result. Introduced in Java 2004 with Java 5, it is part of the java.util.concurrent package and is used to manage and retrieve the results of asynchronous tasks.

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