Exception in thread "main" java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Date
at org.hibernate.type.DateType.deepCopyNotNull(DateType.java:105)
at org.hibernate.type.MutableType.deepCopy(MutableType.java:50)
at org.hibernate.type.TypeFactory.deepCopy(TypeFactory.java:432)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:303)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:144)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:705)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:693)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:689)
at InsertLec.main(InsertLec.java:19)

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.*;

public class InsertLec {
public static void main(String[] args) {
    Configuration cfg = new Configuration();
    cfg.configure("hibernate.cfg.xml");
    SessionFactory sf = cfg.buildSessionFactory();
    Session s = sf.openSession();
    Transaction tax = s.beginTransaction();
    Emp obj = new Emp();
    obj.setId(23);
    obj.setName("Ronnie");
    obj.setMobile(725989);
    obj.setEmail("avd561@gmail.com");
    s.save(obj);
    s.flush();
    tax.commit();
    s.close();
    }
}

<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql:///sample</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">Hamburg89$</property>

<property name="hibernate.connection.autocommit">false</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="use_sql_comments">true</property>

<!-- jdbc transactions -->
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>

<!-- mapping  -->
<mapping resource = "emp.hbm.xml"/>
</session-factory>
</hibernate-configuration>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name = "Emp" table = "Employee">
<id name = "id" column = "Id" type = "integer">
    <generator class = "assigned"></generator>
</id>
<property name="name" column = "Name" type = "string"></property>
<property name="mobile" column = "Mobile" type = "string"></property>
<property name="email" column = "Email" type = "date"></property>
</class>
</hibernate-mapping>