Answer:   factory encapsulates a set of connection configuration parameters that has been defined by an administrator. Each connection factory is an instance of the ConnectionFactory, QueueConnectionFactory, or TopicConnectionFactory interface. To learn how to create connection factories, see To Create JMS Administered Objects for the Synchronous Receive Example.
At the beginning of a JMS client program, you usually inject a connection factory resource into a ConnectionFactory object. For example, the following code fragment specifies a resource whose JNDI name is jms/ConnectionFactory and assigns it to a ConnectionFactory object:
@Resource(lookup = "jms/ConnectionFactory")
private static ConnectionFactory connectionFactory;
In a Java EE application, JMS administered objects are normally placed in the jms naming sub context.