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  1.  Home
  2. JAVA400-L
  3. March 2003

RE: Multiple JVMs on an AS/400?

> > From: Patrick Townsend
> > 
> > By the time your code gets loaded to the point where you can set the
> > java.version property, hasn't it already loaded the JVM? Perhaps I'm
> > confused about how this works?
> 
> Patrick, it's on the load of the JVM:
> 
> java -Djava.version=1.3 MyClass
> 

I'm not sure if that's enough... won't you need the -Xbootclasspath too ? to 
point the Java application loader to an older set of JRE classes/jar files 
(i.e. rt.jar) ?

Of course, it's probably safer if you invoke the 'java.exe' from the JRE of the 
version you want to run at instead...

--phil

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