WebService 1.6 from Oracle Forms 10gr2

Hi IHAC have an OracleAS Forms 10gr2  and They want to call to a Webservice deployed into Java 1.6 on a Tomcat server
Is there any way to do it ?
They have tested some configurations like
- replace jdk 1.4 by 1.6.. but  they know it is not certified

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JDK Version

java version "1.4.2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2)
Classic VM (build 1.4.2, J2RE 1.4.2 IBM AIX build ca142-20070708 (SR9) (JIT enabled: jitc))

JDK Full Version

full version: J2RE 1.4.2 IBM AIX build ca142-20070708 (SR9) java - J2RE 1.4.2 IBM AIX build ca142-20070708 (SR9) java

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Platform 64-bit AIX O/S Version 6.1.0.0 O/S Maintenance Level 6100-05