[#1800] Support Java 8

[asolntsev]

We want to run Play1 applications with Java 8.
The first problem is that "-XX:-UseSplitVerifier" option is not supported by Java8.
I suggest using "-noverify" option instead of "-XX:-UseSplitVerifier" - it should work with both Java7 and Java8.

[cloudbees-pull-request-builder]

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[cloudbees-pull-request-builder]

play-1-3-x-pull-requests #179 FAILURE
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[cloudbees-pull-request-builder]

play-1-3-x-pull-requests #180 FAILURE
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[asolntsev]

Hi!
I have created an issue for this pull request: http://play.lighthouseapp.com/projects/57987-play-framework/tickets/1800-support-java-8

Can you now merge it?

[Peksa]

This only allows Play to run with Java 8, right? It doesn't allow us to use Java 8 features in our projects?

With your branch and a simple controller using Java 8 streams & lambdas as follows:

public class Application extends Controller {
    public static void index() {
        List<Integer> doubles = Arrays.asList(1, 2, 3)
                .stream()
                .map(e -> e*2)
                .collect(Collectors.toList());
        renderJSON(doubles);
    }
}

I get:

23:43:33,738 ERROR ~ 

@6hpo18bc8
Internal Server Error (500) for request GET /

Compilation error (In /app/controllers/Application.java around line 17)
The file /app/controllers/Application.java could not be compiled. Error raised is : Syntax error on token "-", -- expected

play.exceptions.CompilationException: Syntax error on token "-", -- expected
    at play.classloading.ApplicationCompiler$2.acceptResult(ApplicationCompiler.java:246)
    at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:478)
    at play.classloading.ApplicationCompiler.compile(ApplicationCompiler.java:282)
    at play.classloading.ApplicationClassloader.getAllClasses(ApplicationClassloader.java:424)
    at play.Play.start(Play.java:526)
    at play.Play.detectChanges(Play.java:640)
    at play.Invoker$Invocation.init(Invoker.java:197)
    at Invocation.HTTP Request(Play!)

Pretty sure this is because of the eclipse jdt compiler that also needs to be upgraded.

[xael-fry]

@Peksa Yes you are right, I looking if we can update the compiler

[xael-fry]

Merge with #747.
eclipse jdt compiler update will be done in a separate PR