mobile typing isn't scored — practice only
CompletableFuture<String> future = CompletableFuture
Java · general · type the snippet below to practice
def fib(n):
a, b = 0, 1
for _ in range(n):
a, b = b, a + b
return a
about this snippet
This is the future snippet in Java — 7 lines of real Java code that exercises common patterns you'll see in production. DeveloperType scores you on net WPM and accuracy and only counts runs above 95% accuracy on the leaderboard, so practice rewards precision, not speed alone.
view source (7 lines)
CompletableFuture<String> future = CompletableFuture
.supplyAsync(() -> fetchUser(id))
.thenApply(User::getName)
.exceptionally(ex -> "unknown");
return future.get(2, TimeUnit.SECONDS);
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