Original comment posted by Todd.Schiller on 2011-10-19 at 06:03 AM

A similar issue also arises with the Predicate interface:

[ERROR] [MyProject] - Line XXX: The type new Predicate<MyType>(){} must implement the inherited abstract method Predicate<MyType>.apply(Object)

[ERROR] [MyProject] - Line YYY: The method apply(MyType) of type new Predicate<MyType>(){} must override or implement a supertype method

Original comment posted by wasserman.louis on 2011-10-19 at 06:10 PM

This is caused by Java 5/Java 6 issues, not Guava. (Specifically, JDK 5 refuses to accept @Override annotation on interface methods, where JDK 6 handles it fine. I think you're supposed to be able to compile with JDK 6, execute with JDK 5?)

Original comment posted by wasserman.louis on 2011-10-19 at 06:18 PM

(No comment entered for this change.)

Status: Triaged

Original comment posted by cpovirk@google.com on 2011-10-20 at 11:47 PM

I wouldn't have guessed it was an @Override problem, since the compiler doesn't seem to recognize that there's an apply() implementation at all. I'm actually wondering if it's a GWT bug.

Original comment posted by Todd.Schiller on 2011-10-21 at 02:08 AM

@wasserman.louis: I'm not mixing JDK 5 and JDK 6. I'm using 1.6 both for compilation and for the runtime environment.

Attempting to run with a 1.5 JRE gives the warning: "WARNING: Use on a JRE prior to version 1.6 is deprecated", and then everything dies.

With JDK 6, I'm also getting the following errors during validation, which I thought were supposed to be fixed since R9:

[ERROR] [MyProject] - Errors in 'jar:file:/.../MyProject/war/WEB-INF/lib/guava-gwt-10.0.jar!/com/google/common/base/Predicate.java'
[ERROR] [MyProject] - Line 21: The import javax.annotation.Nullable cannot be resolved
[ERROR] [MyProject] - Line 45: Nullable cannot be resolved to a type
[ERROR] [MyProject] - Line 58: Nullable cannot be resolved to a type

Original comment posted by andy.dennie on 2011-11-10 at 04:25 PM

I'm having the same "Nullable" errors as described in comment 4, except that mine are reported with respect to Equivalence:

[ERROR] [myproject] - Errors in 'jar:file:.../myproject/war/WEB-INF/lib/guava-gwt-10.0.1.jar!/com/google/common/base/Equivalence.java'

Original comment posted by kevinb@google.com on 2011-11-15 at 10:11 PM

We believe this is a GWT issue, but if there's something specific we can do let us know.

Status: WontFix

Original comment posted by andy.dennie on 2011-11-16 at 02:21 PM

In comparing guava 9 (which doesn't exhibit the problem) to guava 10, I suspect that the cause has something to do with the fact that the javax.annotation.* packages were included in 9 but not in 10. See the attached screenshot. Could you confer with the GWT team to confirm?

Original comment posted by pondruska+o...@csas.cz on 2011-11-20 at 09:45 PM

Yes, this looks like javax.annotation.* is missing in guava 10 (but present in guava 9). See #776 as that is similar.

Original comment posted by cpovirk@google.com on 2011-12-02 at 10:42 PM

(No comment entered for this change.)

Status: Duplicate
Merged Into: #776