Server VM needed but not available in JRE. Then what package do I need: JRE, JDK?

Question

Hi there,

This is the context: I've just developed an app that needs to be launched in SERVER mode (java -server). I'm using the JSE SDK (JDK) and I have no problems to run the app because the JDK has the Server VM. Now, I'm trying to create an installer that way people will be able to install this app in their computers. But at this point I've noticed this:

The JRE that most users have installed (in order to run java apps), doesn't have the Server VM, so my app won't run. Due to this, my question is:

• Is there any way to add the Server VM to the already installed JRE???
• For those users that don't have java installed...what package should I suggest to install? JDK or JRE?

I'm a little bit a confused...not sure what packages have the Server VM or not.

Thanks in advanced!!

Answer 1

Just use the client mode.

You are not going to find a good solution. You could suggest that they all install the JDK which has the server mode enabled, but your app should have a smoother delivery than that. If you were delivering your application to server guys, you could easily say that it needs to be run in server mode and let them handle it.

The server mode is an optimization to trade start-up time for long-duration speed improvements. It shouldn't be required for any application, especially one which is going to be delivered to client machines.