Error:java: invalid source release: 8 in Intellij. What does it mean?

Question

Im trying to compile some code in I\'m using Intellij Ultimate 13.1.4, but I get the following error and I have no idea what it means:

Information:Using java         


        

Answer 1

Change in pom.xml 1.6 to 1.8

    maven-compiler-plugin
    
        1.8
        1.8