Why I can't import java.util.function package in Android Studio? -

in android studio 2.0 beta 7, can see class "consumer" in java.util.function.consumer. enter image description here

but can't import in android studio,why? have done these methods in gradle follows.i sure have using java8,because can use default keyword in interface , new feature in java8.

can tell me reason? java.util.stream package occurer phenomenon.

in gradle:

compileoptions {     sourcecompatibility javaversion.version_1_8     targetcompatibility javaversion.version_1_8 } 

the package java.util.function made available in android runtime environment, hence can import it. find out classes / packages available in android runtime, look reference here.