How to set PLUGIN_HOME variable for JRE manually installed

[deepclutch]

Hello,
I've JRE 7 manually installed to /opt/jre1.7.0 directory.
I have following lines in /etc/profile :

export PATH=$PATH:/opt/jre1.7.0/bin
export JAVA_HOME=/opt/jre1.7.0/bin/java
export PLUGIN_HOME=/opt/jre1.7.0/lib/

This does not work with java_vm :

java_vm process: You need to set both JAVA_HOME and PLUGIN_HOME

Where PLUGIN_HOME is to be Pointed to?

If I set :

PLUGIN_HOME=/opt/jre1.7.0/lib/amd64/libnpjp2.so

It errors out:

java_vm process: could not find Java VM symbols