Our parent pom currently does not set a default source and target level when compiling, so using 1.7 as your JDK may result in different results than what is used in the CI builds w/ Jenkins. Mickael proposes we set a default source/target level of 1.6: <plugin> <groupId>org.eclipse.tycho</groupId> <artifactId>tycho-compiler-plugin</artifactId> <version>${tychoVersion}</version> <configuration> <encoding>UTF-8</encoding> <!-- JBIDE-14013 --> + <source>1.6</source> + <target>1.6</target> </configuration> </plugin> What do you think? Have your say here: https://issues.jboss.org/browse/JBIDE-14013 https://github.com/jbosstools/jbosstools-build/pull/89 -- Nick Boldt :: JBoss by Red Hat Productization Lead :: JBoss Tools & Dev Studio http://nick.divbyzero.com