Developing JMS and Java applications

IBM® MQ provides two Java language interfaces: IBM MQ classes for Java Message Service and IBM MQ classes for Java.

Within IBM MQ there are two alternative APIs for use in Java applications:

IBM MQ classes for JMS
IBM MQ classes for Java Message Service (JMS) is the JMS provider that is supplied with IBM MQ. The Java Platform, Enterprise Edition Connector Architecture (JCA) provides a standard way of connecting applications running in a Java EE environment to an Enterprise Information System (EIS) such as IBM MQ or Db2®.
IBM MQ classes for Java
IBM MQ classes for Java enable you to use IBM MQ in a Java environment. IBM MQ classes for Java allow a Java application to connect to IBM MQ as an IBM MQ client, or connect directly to an IBM MQ queue manager.
Note:

The IBM MQ classes for Java are functionally stabilized at the level shipped in IBM MQ 8.0. For more information, see Stabilization of IBM MQ classes for Java.

The IBM MQ classes for Java are not supported in IMS.

The IBM MQ classes for Java are not supported in WebSphere® Application Server Liberty. They must not be used with either the IBM MQ Liberty messaging feature, or with the generic JCA support. For more information, see Using WebSphere MQ Java Interfaces in J2EE/JEE Environments.