I am not sure what you're asking 100%
However JMX is an API to configure applications remotely. (through MBeans).
from
http://www.oracle.com/technetwork/java/javase/tech/javamanagement-140525.html :
"The JMX technology provides the tools for building distributed, Web-based, modular and dynamic solutions for managing and monitoring devices, applications, and service-driven networks. By design, this standard is suitable for adapting legacy systems, implementing new management and monitoring solutions, and plugging into those of the future. "
Saying that, WLST and Admin Console are tools that use JMX underneath to configure/Manage/Monitor your WebLogic Server.
Even more, you can use Jconsole that uses JMX as well:
http://java.sun.com/developer/technicalArticles/J2SE/jconsole.html
(but it is better to say with WLS tools.)
Cheers,
Germán