Does Google App Engine support Java 8?

Question

Trying to get started with Google App Engine - does it work with Java 8?

I\'ve followed the instructions on this page: https://console.developers.google.com/start/ap

Answer 1

Yes, using App Engine flexible environment. Here are the official docs: https://cloud.google.com/appengine/docs/flexible/java/

And here is the github repo for this implementation: https://github.com/GoogleCloudPlatform/appengine-java-vm-runtime

Answer 2

You can apparently use JDK8 to create JRE7 compatible byte code, and this seems to be what Google recommends: https://cloud.google.com/appengine/docs/standard/java/download

-source 1.7 -target 1.7

Answer 3

Not at the time of writing but you can keep track of the status in this issue:

• Java 8 support: https://code.google.com/p/googleappengine/issues/detail?id=9537

Answer 4

Add <runtime>java8</runtime> to your appengine-web.xml file.

Answer 5

Yes, You can use flexible environment. and change setting of your app.yaml

vm: true

for more information study https://cloud.google.com/appengine/docs/flexible/

Answer 6

If your interest is in using lambda expressions on Google App Engine, you could give Retrolambda a try. I haven't tried it yet, but it claims to backport Java 8 lambda expressions to Java 7.