matthias-w

Hello and thank you for your answer. I deleted .m2 directory and executed mvn -U ... command. System started downloading lots of stuff until this line. ... Downloaded: http://repo.maven.apache.org/maven2/com/google/collections/google-collections/1.0/google-collections-1.0.jar (625...

Thanks lyubomir, the Java version was the problem. I had two different Java JDKs (6 and 7). JRE was pointing version 7 and the Compiler to version 6. Maven was...