> Thank you for your extensive replies!
> So I will use the JDK 1.5 version until I phase out the remaining JRE 1.5.
> If I understand correctly, as long as you stay with the specs of the Java
> platform 1.5 you can use the JDK 1.5 version on JRE 1.5 and 1.6.

I am not so sure about that. At my previous job an application developed on Java 5 failed when run on Java 6 without updating to JDBC 4.0 drivers (Oracle and SQL Server) due - as far as I can remeber - to unimplemented methods that existed in the JDBC-interfaces in Java 6.

It might work (that application was quite complex and used a lot of JDBC features). I don't recall the exact failure, but keep in mind (and inform your support staff) that you may need to replace the Jaybird implementation when a client runs your application on Java 6, or that you need to invest time into testing your application on both Java 5 and 6.
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