Can I use a library compiled with Java 8 in a Java 7 application?

Question

Simple question: If I have an application compiled with Java 7, can I use a library compiled with Java 8 with it? Of course, Java 8 is installed.

Answer 1

To leave the question not-unanswered, I copied the comment from fge (emphasizes mine):

If you run a Java 8 JVM, yes; if you run a Java 7 JVM, no (you'll get an UnsupportedClassVersionError if you try).