If you have to write stored procedures for oracle is important
to notice which Java version is supported by your Oracle Database,

A common technique is create a JAVA stored procedure for that:

1. Create a function with an ORACLE SQL statement like:

CREATE OR REPLACE FUNCTION getJavaProperty(myprop IN VARCHAR2)
RETURN VARCHAR2 IS LANGUAGE JAVA
name ‘java.lang.System.getProperty(java.lang.String) return java.lang.String’;

2. Once you created the function you can use it to get the version:

SELECT getJavaProperty(‘java.version’) from dual;

You can see in the attached version that for my Oracle Database 10.1.0.4.2 the Java version is 1.4.2_04 :)