I\'m using IntelliJ IDEA Ultimate 2016.2.1, have set Project SDK to my 1.8 version, Project Language Level to 8, Module SDK to my 1.8 version, and JDK home path to /Library/Java
Hey @Calicoder just try to make change your Java compiler version into 1.7 or 1.8 as mentioned below
Thanks hope this will help.