Exploring Java 9: Build Modularized Applications in Java

© Fu Cheng 2018

Fu ChengExploring Java 9https://doi.org/10.1007/978-1-4842-3330-6_10

10. Concurrency

Fu Cheng¹ 

(1)

Auckland, New Zealand

 

This chapter summarizes changes related to concurrency in Java 9.

CompletableFuture

Several new methods have been added to java.util.concurrent.CompletableFuture in Java 9.

Async

The CompletableFuture<T> completeAsync(Supplier<? extends T> supplier, Executor executor) and CompletableFuture<T> completeAsync(Supplier<? extends T> supplier) methods c omplete the CompletableFuture by using an asynchronous task to invoke the Supplier to get the result. The task is executed using the provided executor or the default executor. Listing 10-1 shows examples of how to use completeAsync().

final Long v1 = new CompletableFuture<Long>().completeAsync(() ...