Error with oauth verify on google signIn

Version of google-api-java-client (e.g. 1.15.0-rc)?
google-api-java-client 1.15.0-rc

Java environment (e.g. Java 6, Android 2.3, App Engine)?

java 6

Describe the problem.

I have a problem using the API for google+ signIn, with springframework for an 
application, when i excute refresh token, sended by Android-app to server, i 
have this error:

org.springframework.web.util.NestedServletException: Handler processing failed; 
nested exception is java.lang.VerifyError: Cannot inherit from final class
    at org.springframework.web.servlet.DispatcherServlet.triggerAfterCompletionWithError(DispatcherServlet.java:1259)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:920)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:827)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:801)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
Caused by: java.lang.VerifyError: Cannot inherit from final class
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2888)
    at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1172)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1558)
    at com.google.api.client.googleapis.auth.oauth2.GoogleCredential$Builder.build(GoogleCredential.java:362)
    at xxx.xxxx.webapp.controller.mobile.GoogleController.Validationtoken(GoogleController.java:221)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:616)
    at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
    at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:440)
    at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:428)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
    ... 84 more

caused by this line of code: 
GoogleCredential credential = new GoogleCredential.Builder()
.setJsonFactory(JSON_FACTORY).setTransport(TRANSPORT)
.setClientSecrets(CLIENT_ID, CLIENT_SECRET).build()
.setFromTokenResponse(JSON_FACTORY
.fromString(stringToken,GoogleTokenResponse.class));

P.S.: I follow the description on 
https://developers.google.com/+/web/signin/server-side-flow
Original issue reported on code.google.com by robe...@soundtracker.fm on 17 Oct 2013 at 4:10
anandsekar272 / google-api-java-client

Error with oauth verify on google signIn #843
