How do I figure out and change which version of Java Maven is using to execute?

Question

When running our Maven build, a member of my team gets an error when executing. However, when we run java -version from her command line, it indicates Java 1.6.

Answer 1

mvn -version will output which java it's using. If JAVA_HOME is set to a valid JDK directory and Maven is using something else, then most likely someone has tampered with the way that Maven starts up.