title: Can you compile a class using Java 8 and then use it in Java 7?
body: <p>Can you compile a class using Java 8 and then use it in Java 7?</p>
  
  <p>I'd like to write a utility JAR with a simple interface (Java 7 compatible) but using lambdas all over the place inside. Then I'd like to use the utility in some code that has to be compiled with JDK 7.. </p>
  
  <p>is it possible?</p>
  
  <hr>
  
  <p>As you can see, there are some contradictory answers.. so, what's the truth? ;-)</p>