IDEA: javac: source release 1.7 requires target release 1.7

Question

When running a JUnit test, using IntelliJ IDEA, I get

How can I correc

Answer 1

Most likely you have incorrect compiler options imported from Maven here:

Also check project and module bytecode (target) version settings outlined on the screenshot.

Other places where the source language level is configured:

• Project Structure | Project

• Project Structure | Modules (check every module) | Sources

Maven default language level is 1.5 (5.0), you will see this version as the Module language level on the screenshot above.

This can be changed using maven-compiler-plugin configuration inside pom.xml:

  [...]
  
    [...]
    
      
        org.apache.maven.plugins
        maven-compiler-plugin
        
          1.8
          1.8
        
      
    
    [...]
  
  [...]

or

  [...]
  
    1.8
    1.8
  
  [...]

IntelliJ IDEA will respect this setting after you Reimport the Maven project in the Maven Projects tool window: