How to check JRE version prior to launch?

Question

What\'s the best way to determine if the version of the JRE installed on a machine is high enough for the application which the user wants to run? Is there a way of doing it

Answer 1

System.getProperties() gives you a listing of JVM properties including the different version ids of the JRE, JVM and specification. This implemented for all versions of Java so should work regardless of version compiled in and version run in, or the implementation.

If you write a basic class to test the version, you can call this first in your main() launching class. It must really be basic functionality though or you might risk breaking it.