What causes imported Maven project in Eclipse to use Java 1.5 instead of Java 1.6 by default and how can I ensure it doesn't?

Question

I imported a Maven project and it used Java 1.5 even though I have 1.6 configured as my Eclipse default Preferences->Java->Installed JREs.

When I

Answer 1

Simplest solution in Springboot

I'll give you the most simpler one if you use Springboot:

  1.8

Then, right click on your Eclipse project: Maven > Update project > Update project configuration from pom.xml

That should do.