class not found exception in hibernate

class not found exception in hibernate

i am geting the following errot when i am tryinh to run my j2ee projrct. the same project was working before and i started geting this exception now. i am sure that all class are there along with their mapping files

if i remove mappping of jobtitle from my hibernate.cfg.xml ien the project is running

java.lang.ExceptionInInitializerError hrm.dao.HibernateUtil.<clinit>( hrm.dao.AbstractDAO.<init>( hrm.dao.JobSpecificationDAO.<init>( hrm.actions.JobSpecificationAction.execute( org.apache.struts.action.RequestProcessor.processActionPerform( org.apache.struts.action.RequestProcessor.process( org.apache.struts.action.ActionServlet.process( org.apache.struts.action.ActionServlet.doGet( javax.servlet.http.HttpServlet.service( javax.servlet.http.HttpServlet.service( org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(  java.lang.ClassNotFoundException: hrm.dao.Jobtitle 

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java.lang.ClassNotFoundException: hrm.dao.Jobtitle 
means you do indicate a mapping in your hibernate.cfg.xml, but a mapping to a class which is not in the classpath of the j2ee project..
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