使用BiConsumer处理两个阶段的结果

上面的例子还可以通过BiConsumer来实现:

static void thenAcceptBothExample() {String original = "Message";StringBuilder result = new StringBuilder();CompletableFuture.completedFuture(original).thenApply(String::toUpperCase).thenAcceptBoth(CompletableFuture.completedFuture(original).thenApply(String::toLowerCase),(s1, s2) -> result.append(s1 + s2));assertEquals("MESSAGEmessage", result.toString());
}