tree 5087b382aef686cbc9a5c572013336e3ca6a74e7
parent 31ac927d3c255c4757167cacb45daf75529e1f1e
author Pete Gillin <peteg@google.com> 1569934651 +0100
committer Pete Gillin <peteg@google.com> 1570023842 +0100

Enable Java language level 9 by default.

This changes the default Java language level from 8 to 9, i.e. javac
invocations now use -source 1.9 -target 1.9.

The environment variable EXPERIMENTAL_JAVA_LANGUAGE_LEVEL_9=false is
added to switch back to the language level 8 behaviour. (Previously,
setting that variable to true was required to opt in to language level
9.)

Test: make droid java tests cts docs
Test: javap -v <some class file in output> | grep 'major version' (reports 53, for classes from 'benchmarks' which is in Android.bp and 'ahat' which is in Android.mk)
Test: make RunBluetoothRoboTests RunCarSettingsLibRoboTests (two main flavours of robolectric)
Test: make cts && cts-tradefed help
Test: atest CtsLibcoreTestCases (reasonably low-level device tests)
Test: atest CtsHostTzDataTests (arbitrary host test)
Bug: 115604102
Change-Id: Ie78dc568ed7d158f4e106075fafa0ea4a771fe19