java - thenAccept 和 thenApply 的区别

Question

我正在阅读关于 CompletableFuture 的文档，thenAccept() 的描述是

Returns a new CompletionStage that, when this stage completes normally, is executed with this stage's result as the argument to the supplied action.

对于 thenApply() 是

Returns a new CompletionStage that, when this stage completes normally, is executed with this stage's result as the argument to the supplied function.```

谁能通过一些简单的例子来解释两者之间的区别？

Answer 1

您需要查看完整的方法签名:

CompletableFuture<Void>     thenAccept(Consumer<? super T> action)
<U> CompletableFuture<U>    thenApply(Function<? super T,? extends U> fn)

thenAccept 接受一个 Consumer 并返回一个 T=Void CF，即不带值的CF，只有完成状态。

另一方面，

thenApply 接受一个 Function 并返回一个带有函数返回值的 CF。