About

Ie the java executable:

java

Different JVM exist and are embedded/available in a image

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(Options|Arguments)

Options that:

• begin with -X are non-standard (not guaranteed to be supported on all VM implementations), and are subject to change without notice in subsequent releases of the JDK.
• Options that are specified with -XX are not stable and are subject to change without notice.

Performance

The garbage collection is the most important factor in tuning a JVM. in order to get a good application performance.

Check it

To be able to check the JVM and to return a message to the user, you need to compile the main class with a lower jdk.

You need then to compile your source code differently. See Configuring compile to run twice

Documentation / Reference

• JVM Options