There are different ways to connect to IBM MQ in a Java application.

• Connect to IBM MQ in Java using JMS
• Connect to IBM MQ in Java using MQQueueManager
• Connect to IBM MQ in Java using WebSphere JNDI lookup

If you have access to the IBM MQ system, the following commands can be used to get the values needed for the connection factory.

• Use the hostname command to determine the hostname of the IBM MQ system
• Use the dspmq command to determine the name of the queue manager
• Use the display lsstatus command to determine the port
• Use the display channel command to determine the name of the channel and the SSL cipher

In this example, the Java app is connecting to IBM MQ in Java using JMS.

package com.jms.demo;

import java.util.Properties;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import com.ibm.msg.client.jms.JmsConnectionFactory;
import com.ibm.msg.client.jms.JmsFactoryFactory;
import com.ibm.msg.client.wmq.WMQConstants;

public class Consumer {
  public static void main(String[] args) throws NamingException, JMSException {
    String HOST         = "your_hostname";
    int PORT            = your_port;
    String QMGR         = "your_manager";
    String QUEUE        = "your_queue";
    String CHANNEL      = "your_channel";
    String USERNAME     = "your_username";
    String PASSWORD     = "your_password";
	
    JmsFactoryFactory ff    = JmsFactoryFactory.getInstance(WMQConstants.WMQ_PROVIDER);
    JmsConnectionFactory cf = ff.createConnectionFactory();

    cf.setStringProperty (WMQConstants.WMQ_HOST_NAME,             HOST);
    cf.setIntProperty    (WMQConstants.WMQ_PORT,                  PORT);
    cf.setStringProperty (WMQConstants.WMQ_CHANNEL,               CHANNEL);
    cf.setIntProperty    (WMQConstants.WMQ_CONNECTION_MODE,       WMQConstants.WMQ_CM_CLIENT);
    cf.setStringProperty (WMQConstants.WMQ_QUEUE_MANAGER,         QMGR);
    cf.setBooleanProperty(WMQConstants.USER_AUTHENTICATION_MQCSP, true);
    cf.setStringProperty (WMQConstants.USERID,                    USERNAME);
    cf.setStringProperty (WMQConstants.PASSWORD,                  PASSWORD);

    Connection conn = cf.createConnection(USERNAME, PASSWORD);
    conn.start();
    Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
    Queue queue = session.createQueue("queue:///"+QUEUE);
    MessageConsumer consumer = session.createConsumer(queue);
    Message message = consumer.receive(10000);
    String text = ((TextMessage) message).getText();
    return "got message: " + text;
  }		
}