lambdasinaction code example Eorror In Chap3 about java8inaction HOT 2 CLOSED

This is because the source code was updated to Java 9.

takeWhile is a new method added to Stream interface in Java 9:

https://docs.oracle.com/javase/9/docs/api/java/util/stream/Stream.html#takeWhile-java.util.function.Predicate-

filtering and flatMapping where added to the Collectors interface:

https://docs.oracle.com/javase/9/docs/api/java/util/stream/Collectors.html#flatMapping-java.util.function.Function-java.util.stream.Collector-

https://docs.oracle.com/javase/9/docs/api/java/util/stream/Collectors.html#filtering-java.util.function.Predicate-java.util.stream.Collector-

So, update to JDK 9.

from java8inaction.

thank you,I see in pom.xml that the environment needs jdk9. but this book is jdk8Inaction.
Well, i admit i was careless...
by the way, i download jdk9. its no many jar,eg:rt.jar,resource.jar...
so, i cannot use jdk9

from java8inaction.