The Art of Changing | Confessions of a Pragmatic Intellectual's Mind on The Constant in Life, Change!
Just find the oc4j.cmd in the bin directory and use the following command to set your ORACLE_HOME set ORACLE_HOME=C:FilesDevelopExternaloc4j_extended_101340 add this line the to the first line of oc4j.cmd. Using this option, you don’t need to set ORACLE_HOME in your environment variables any more.
If you are running a standalone OC4J, make sure that you have set the ORACLE_HOME and JAVA_HOME properly. If an IT guy in your company has set up your computer, then you need to double check that ORACLE_HOME is not set to the oracle folder installation but the location where you unzipped OC4J.