Your question is Java Version Differences. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
What is the difference between Java 1.6 and Java 1.7? Explain the important language, JVM, standard-library, and tooling changes, and give concrete examples of code that can be written in Java 1.7 but not Java 1.6. Also mention compatibility concerns when compiling or running applications across these versions.