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kishor kalapa
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package com.coll.clients;

import java.util.HashSet;
import java.util.Set;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import com.coll.pojos.Images123;
import com.coll.pojos.Item123;

public class CollectionKing {

* @param args
public static void main(String[] args) {
// TODO Auto-generated method stub
SessionFactory sf=new Configuration().configure().buildSessionFactory();
session s=sf.openSession();
Transaction tx=s.beginTransaction();
Images123 i=new Images123(); //1*********
Images123 i1=new Images123(); //2**********
Item123 it=new Item123();
Set set=new HashSet();
it.setItemDescription("Car is very good");


package com.coll.pojos;

public class Images123 {
private int itemId;
private String fileName;

public int getItemId() {
return itemId;
public void setItemId(int itemId) {
this.itemId = itemId;
public String getFileName() {
return fileName;
public void setFileName(String fileName) {
this.fileName = fileName;

------------------------------------------------------------------------ :

package com.coll.pojos;

import java.util.HashSet;
import java.util.Set;

public class Item123 {
private int itemId;
private String itemName;
private String itemDescription;
private Set images=new HashSet();
public int getItemId() {
return itemId;
public void setItemId(int itemId) {
this.itemId = itemId;
public String getItemName() {
return itemName;
public void setItemName(String itemName) {
this.itemName = itemName;
public String getItemDescription() {
return itemDescription;
public void setItemDescription(String itemDescription) {
this.itemDescription = itemDescription;
public Set getImages() {
return images;
public void setImages(Set images) {
this.images = images;


<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "" >
<hibernate-mapping package="com.coll.pojos">
<class name="Item123" table="item">
<id name="itemId" column="item_id">
<property name="itemName" column="name"></property>
<property name="itemDescription" column="description"></property>
<set name="images" table="item_image">
<key column="ITEM_ID"></key>
<element type="string" column="FILENAME" not-null="true"></element>
cfg file:
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"

<!-- Generated by MyEclipse Hibernate Tools. -->

<property name="connection.username">root</property>
<property name="connection.url">
<property name="dialect">
<property name="myeclipse.connection.profile">RaviDriver</property>
<property name="connection.password">root</property>
<property name="connection.driver_class">
<property name="">update</property>
<property name="show_sql">true</property>
<mapping resource="com/coll/pojos/primarycollection-hbm.xml" />


when I run the I am getting ClasscastException on image123(as element) insertion into images(set),if I am replace set element as string program runnig fine.
Can any one mention changes required to run for set element as Images123.
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