JFR defines the following modules:

• jdk.jfr: This defines the API and internals for the JFR profiler. You can use it to profile your applications that run on resource-constrained devices such as the IoT (short for Internet of Things) or mobile devices. Jdk.jfr only needs the java.base module.
• jdk.management.jfr: To use flight recording remotely over Java Management Extensions (JMX), you can use this module. It requires the jdk.jfr and jdk.management modules.

We won't cover the code of JMC, just its features and how to use them.