Limit a stream by a predicate

by

Operations takeWhile and dropWhile have been added to JDK 9. Your example code

IntStream
    .iterate(1, n -> n + 1)
    .takeWhile(n -> n < 10)
    .forEach(System.out::println);

will behave exactly as you expect it to when compiled and run under JDK 9.

JDK 9 has been released. It is available for download here: JDK 9 Releases.

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