import java.util.List;
import java.util.Set;



public class Channel {
   
   private long id;
   private String channelName;
   private Set<User> users;
   private Set<Relation> relations;
   
   public String getChannelName() {
      return channelName;
   }
   public void setChannelName(String channelName) {
      this.channelName = channelName;
   }
      public Set<User> getUsers() {
      return users;
   }
   public void setUsers(Set<User> users) {
      this.users = users;
   }
   public long getId() {
      return id;
   }
   public void setId(long id) {
      this.id = id;
   }
   public Set<Relation> getRelations() {
      return relations;
   }
   public void setRelations(Set<Relation> relations) {
      this.relations = relations;
   }
   
   
}




import java.util.Set;


public class User {

   private long id;
   private String username;   
   private String fullName;
   private Set<Channel> channels;
   
   public String getUsername() {
      return username;
   }
   public void setUsername(String username) {
      this.username = username;
   }
   
   public String getFullName() {
      return fullName;
   }
   public void setFullName(String fullName) {
      this.fullName = fullName;
   }
   
   public long getId() {
      return id;
   }
   public void setId(long id) {
      this.id = id;
   }
   
   public Set<Channel> getChannels() {
      return channels;
   }
   public void setChannels(Set<Channel> channels) {
      this.channels = channels;
   }
   
   
}


import java.io.File;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;





public class FirstExample {


   public static SessionFactory sessionFactory = null;



   private void getChannelUsers (Long channelId) {      
      Configuration config = new Configuration();
      Configuration configuration  = config.configure();
      sessionFactory = configuration.buildSessionFactory();
      Session session  =sessionFactory.openSession();
      Transaction transaction = session.beginTransaction();
      ArrayList<User> subList = new ArrayList<User>();
      Channel channelObj = (Channel)  session.get(Channel.class, 2l);
      
      Set<User> userSet = channelObj.getUsers();
      
      System.out.println("LIST " );
      for (Iterator i = userSet.iterator(); i.hasNext();) {
         User user = (User) i.next();
         System.out.println("USER") ;
         System.out.println(user.getFullName());   
      }
      
       transaction.commit();

       session.close();

   }

   public static void main(String args[]){

      FirstExample eg = new FirstExample();
      eg.getChannelUsers (2l);


   }


}

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
  <class name="User" table="USER">
   <id name="id" column="USER_ID">
 
  </id>
  <!--<property name="username">
     <column name="USERNAME" />
  </property>-->
<property name="fullName">
     <column name="FULLNAME" />
  </property>

<set name="channels" table="user_channel" >
   <key column="user_id"/>
   <many-to-many class="Channel"/>
</set>
</class>
</hibernate-mapping>



<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
  <class name="Channel" table="CHANNEL">
<!--  <id name="channelId" type="long" column="CHANNEL_ID">
   <generator class="increment"/>
  </id>-->
<id name="id" column="CHANNEL_ID">

  </id>
  <property name="channelName">
     <column name="CHANNEL_NAME" />
  </property>
  <property name="channelDesc">
    <column name="DESCRIPTION"/>
  </property>
<set name="relations" cascade="all">
   <key column="channel_id"/>
   <one-to-many class="Relation"/>
</set>
<set name="users" table="user_channel" >
   <key column="channel_id"/>
   <many-to-many class="User"/>
</set>
</class>
</hibernate-mapping>