The Java Stream API provides a functional approach to processing streams of objects - also known as functional stream processing.
The Java ExecutorService can execute tasks concurrently in separate threads. I have added information about how to cancel tasks, plus a few other changes.
The Java Future interface represents the result of a task that is executed concurrently, for instance by a Java ExecutorService.
The Java Callable interface represents a task that can be executed concurrently, for instance by a Java ExecutorService.