摘要：在這片文章里，主要介紹怎么用的開源框架來解答上一些經(jīng)常被問到關(guān)于的問題用用用用用用用用

在這片文章里，主要介紹怎么用Java 8 Stream的開源框架 StreamEx來解答StackOverflow上一些經(jīng)常被問到關(guān)于Java 8 Stream的問題：

Convert Java 8 List into Map

用JDK Stream API:

Map result =
    choices.stream().collect(Collectors.toMap(Choice::getName,
                                              Function.identity()));

用StreamEx API：

Map result = StreamEx.of(choices).toMap(Choice::getName);

Custom thread pool in Java 8 parallel stream

用JDK Stream API:

ForkJoinPool forkJoinPool = new ForkJoinPool(2);
forkJoinPool.submit(() ->
    //parallel task here, for example
    IntStream.range(1, 1_000_000).parallel().filter(PrimesPrint::isPrime).collect(toList())
).get();

用StreamEx API：

IntStreamEx.range(1, 1_000_000).parallel(new ForkJoinPool(2))
           .filter(PrimesPrint::isPrime).toList();

Java 8 Distinct by property

用JDK Stream API:

public static  Predicate distinctByKey(Function keyExtractor) {
    Set