The HotSpotDiagnosticMXBean API is added in Mustang.  We should provide a nice UI for accessing the diagnostic MBean functionality.  In addition, we could group some other diagnostic features in this tab such as -verbose:gc and -verbose:class.
The following operations are available in the platform JVM MBeans:
  1. turn on/off verbose:gc
  2. turn on/off verbose:class
  3. deadlock detection
  4. reset peak memory usage
  5. reset thread peak count
  6. turn on/off thread contention statistics

It would be good to enhance the jconsole tabs to add these buttons.