Exception in thread "main" java.lang.NullPointerException at JMS.JMSClient.main(JMSClient.java:15)

package JMS;
import javax.jms.*;
import javax.annotation.Resource;
import javax.naming.NamingException;
 
public class JMSClient {
          @Resource(mappedName = "jms/__defaultConnectionFactory")
          private static ConnectionFactory connectionFactory;
          @Resource(mappedName = "jms/Example1Queue")
         private static Queue queue;
 
    public static void main(String[] args) throws JMSException, NamingException {
 
 
        Connection connection = connectionFactory.createConnection();
 
        Destination dest = (Destination) queue;
 
        System.out.println(connection);
 
    }
}

  import javax.jms.ConnectionFactory;
  import javax.jms.Destination;
  import javax.jms.Queue;
  import javax.jms.Topic;
  import javax.jms.Connection;
  import javax.jms.Session;
  import javax.jms.MessageProducer;
  import javax.jms.TextMessage;
  import javax.jms.JMSException;
  import javax.annotation.Resource;
  import java.io.InputStreamReader;
  import java.io.IOException;
  public class JMSClient {
      @Resource(mappedName = "jms/Example1ConnectionFactory")
      private static ConnectionFactory connectionFactory;
      @Resource(mappedName = "jms/Example1Queue")
      private static Queue queue;
 
      public static void main(String[] args) {
          Connection connection = null;
 
         Destination dest = (Destination) queue;
 
          try {
              connection = connectionFactory.createConnection();  Session session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE);              MessageProducer producer = session.createProducer(dest);
             TextMessage message = session.createTextMessage();26  InputStreamReader inputStreamReader = new InputStreamReader(System.in);
              char c = 'n';
              int i = 0;
             while (!((c == 'q') || (c == 'Q'))) {
                  try {
                     c = (char) inputStreamReader.read();
                      message.setText("This is message " + (i + 1));
                     System.out.println("Sending message: " + message.getText());
                     producer.send(message);    
                     i++;
                  } catch (IOException e) {
                      System.err.println("I/O exception: " + e.toString());
                  }
              }
          } catch (JMSException e) {
              System.err.println("Exception occurred: " + e.toString());
          } finally {
              if (connection != null) {
                  try {
                      connection.close();
                  } catch (JMSException e) {
                  }
              }
          }
      }
  }

@Resource(lookup = "jndiName")

@Resource(lookup = "java:comp/env/jms/_defaultConnectionFactory")

 public static void main(String[] args) throws JMSException, NamingException {
 
 
        Context ctx = new InitialContext();
 
        ConnectionFactory qcf = (ConnectionFactory)ctx.lookup("jms/__defaultConnectionFactory");
 
        Connection con = qcf.createConnection();
 
        System.out.println(con);
 
 
        QueueSession session = (QueueSession) con.createSession(false, Session.AUTO_ACKNOWLEDGE);
        Queue queue = null;
        try{
            queue = (Queue)ctx.lookup("jms/Example1Queue");
        }catch(NameNotFoundException nnfe){
            queue = session.createQueue("jms/Example1Queue");
            ctx.bind("jms/Example1Queue",queue);
        }
 
    }