You can configure your Java settings either through the system settings or the profile settings. System settings serve as default settings for new projects and new profiles within existing projects. During a running test, virtual users use the Java settings of the profiles they are assigned to.
Use the general Java settings to specify the JDK version, its location on your hard drive, and the class path. When a class path contains well-known locations such as a project directory or data directory, these path parts are automatically replaced with placeholders. Placeholders are useful when migrating projects or running virtual users on agent machines where the directories have different names than on the controller machine.