Identifies a JMX resource. Typically formatted as a String as jmx.domain:key=value,key=value where "jmx.domain" identifies groups of related components, and the keys and values give more information about the component in question (it's type, it's name, etc.). There is an { { { ObjectName } } } class that wraps the String with useful functions (to pull out individual properties, etc.). Creating an { { { ObjectName } } } from a String is expensive, but the { { { ObjectName } } } instances are cached if you call { { { ObjectName.getInstance(String) } } }