Check the Java compiler compliance level of a compiled .class file

javap -verbose unimelb/daris/client/cli/Application.class | grep major

  major version: 52

Java major version

Java 1.2 uses major version 46
Java 1.3 uses major version 47
Java 1.4 uses major version 48
Java 5 uses major version 49
Java 6 uses major version 50
Java 7 uses major version 51
Java 8 uses major version 52
Java 9 uses major version 53
Java 10 uses major version 54
Java 11 uses major version 55