Java version judgment error

I just installed Android Studio 1.04 on Ubuntu 1.04. I created a new project with the following error:

Error:Could not determine Java version using executable /usr/lib/jvm/java-1.5.0-gcj/bin/java.

My /usr/lib/jvm/ contains:

java-1.5.0-gcj            java-7-oracle  java-gcj
java-1.5.0-gcj-4.8-amd64  java-8-oracle  java-gcj-4.8

The project structure sets the JDK location to /usr/lib/jvm/java-1.5.0-gcj. Should I be given something else? I don’t know?

Thank you very much for your help!

I solved my problem by simply changing the JDK to /usr/lib/jvm/java-8-oracle. I still don’t know why it would work, or why it should have been that way in the first place.
Sorry for the question.