How to deliver my Java application with a particular JRE?

Question

Does somebody know how to pack a particular JRE together with a compiled Java application? I currently have an executable jar file and wish to put JRE 6 Update 31 in it. So

Answer 1

You can deploy it with java webstart which enables you to download a certain version of the jre if not present. I don't know if downgrading is possible, however. Java must be installed already, too.