IllegalArgumentException In hibernate

[Hamzah khammash]

hello i have this exception

Exception in thread "main" java.lang.IllegalArgumentException: Named query not found: select c from com.hibernate.Course c
	at org.hibernate.ejb.AbstractEntityManagerImpl.createNamedQuery(AbstractEntityManagerImpl.java:451)
	at com.main.MainTest.listDatabase(MainTest.java:22)
	at com.main.MainTest.main(MainTest.java:12)

in my code here is some file i used:
persistence.xml:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0"
	xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
	<persistence-unit name="MainTest">
		<provider>org.hibernate.ejb.HibernatePersistence</provider>
		<class>com.hibernate.Course</class>
		<properties>
			<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost/TEST" />
			<property name="javax.persistence.jdbc.user" value="root" />
			<property name="javax.persistence.jdbc.password" value="password" />
			<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
			<property name="hibernate.ejb.cfgfile" value="hibernate.cfg.xml" />
			<property name="hibernate.archive.autodetection" value="class, hbm" />
		</properties>
	</persistence-unit>
</persistence>

and hibernate.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!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://localhost/TEST</property>
		<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
		<property name="hibernate.connection.username">root</property>
		<property name="hibernate.connection.password">password</property>
		<property name="hibernate.current_session_context_class">thread</property>
	</session-factory>
</hibernate-configuration>

and main class:

package com.main;

import javax.persistence.EntityManager;
import javax.persistence.Query;

import com.hibernate.ConnectionFactory;

public class MainTest {

	public static void main(String[] args) {
		MainTest mainTest = new MainTest();
		mainTest.listDatabase();

	}

	public void listDatabase() {
		EntityManager em = ConnectionFactory.getPrimaryEM();
		// em.persist(arg0);
		// em.merge(arg0);
		String queryString = "select c from com.hibernate.Course c";
		javax.persistence.Query query = (Query) em
				.createNamedQuery(queryString).getResultList();
		// List course =
		// Factory.getPrimaryEM().createQuery("from course").getResultList();
		/*
		 * List course = query.list(); Iterator iterator = course.iterator();
		 * while (iterator.hasNext()) { Course course1 = (Course)
		 * iterator.next(); System.out.println(course1.getCourseId());
		 * System.out.println(course1.getCourseName()); }
		 */

	}
}

so what is happened and how can o solve this ?

[Vijitha Kumara]

Use createQuery() method instead.