Problem with Octave and Java

I have installed Octave (from repos) for the first time. I also installed the Java API package.
When I run octave from terminal, here's what I get

Code:

warning: timestamp on file /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/server/libjvm.so is in the future error: java_invoke: /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/server/libjvm.so: failed to load: /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/server/libjvm.so: cannot open shared object file: No such file or directory error: called from: error: /usr/share/octave/packages/java-1.2.8/javaaddpath.m at line 41, column 13 error: /usr/lib/x86_64-linux-gnu/octave/packages/io-1.0.19/x86_64-pc-linux-gnu-api-v48+/PKG_ADD at line 20, column 11 error: addpath: all arguments must be character strings error: addpath: all arguments must be character strings error: addpath: all arguments must be character strings error: addpath: all arguments must be character strings error: addpath: all arguments must be character strings error: addpath: all arguments must be character strings error: addpath: all arguments must be character strings error: addpath: all arguments must be character strings error: addpath: all arguments must be character strings error: addpath: all arguments must be character strings error: /usr/share/octave/3.6.4/m/pkg/pkg.m at line 2357, column 5 error: /usr/share/octave/3.6.4/m/pkg/pkg.m at line 2147, column 1 error: /usr/share/octave/3.6.4/m/pkg/pkg.m at line 401, column 7 error: /usr/share/octave/3.6.4/m/startup/octaverc at line 33, column 1

The problem is it is looking for OpenJDK whereas I use Oracle Java. JAVA_HOME is correctly set to /usr/lib/jvm/java-7-oracle, so is PATH.

So how can I tell Octave where to look for JRE and/or JDK?

Thanks