Is it possible to compile java using Oracle JDK and run the code on OpenJDK?
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So is it possible to do all the development of a Java daemon (Apache Daemon) on a Windows 7 machine, then install the service on Ubuntu server (still have to search how to do that) which has OpenJDK installed ?

If yes, how can I identify the compatible versions of Java on both systems ? I mean if I'm using Java 1.6 on windows, what is the least compatible OpenJDK version I should have on Ubuntu server ?