I'm reading the document on CompletableFuture and The description for thenAccept() is
Returns a new CompletionStage that, when this stage completes normally, is executed with this stage's result as the argument to the supplied action.
and for thenApply() is
Returns a new CompletionStage that, when this stage completes normally, is executed with this stage's result as the argument to the supplied function.```
Can anyone explain the difference between the two with some simple examples?
I would answer this question in the way I remember the difference between the two: Consider the following future.
CompletableFuture<String> completableFuture
= CompletableFuture.supplyAsync(() -> "Hello");
ThenAccept basically takes a consumer and passes it the result of the computation CompletableFuture<Void>
CompletableFuture<Void> future = completableFuture
.thenAccept(s -> System.out.println("Computation returned: " + s));
You can associate this with forEach in streams for easy remembering.
Where as thenApply accepts a Function instance, uses it to process the result and returns a Future that holds a value returned by a function:
CompletableFuture<String> future = completableFuture
.thenApply(s -> s + " World");
You can associate this with map in the streams as it is actually performing a transformation.