org.hibernate.MappingException: Could not determine type for: java.util.List, at table: College, for columns: [org.hibernate.mapping.Column(students)] -

now, learning hibernate, , started using in project. crud application. used hibernate crud operations. works of them. but, one-to-many & many-to-one, tired of trying it. gives me below error.

org.hibernate.mappingexception: not determine type for: java.util.list, @ table: college, columns: [org.hibernate.mapping.column(students)]

then again went through video tutorial. simple me, in beginning. but, cant make work. now, says

org.hibernate.mappingexception: not determine type for: java.util.list, @ table: college, columns: [org.hibernate.mapping.column(students)]

i have ran searches in internet, there telling its bug in hibernate, , says, adding @genereatedvalue error ll cleared. but, nothings works me,

i hope ll fix!!

thanks!

here code:

college.java

@entity public class college { @id @generatedvalue(strategy=generationtype.auto) private int collegeid; private string collegename;   private list<student> students;  @onetomany(targetentity=student.class, mappedby="college", fetch=fetchtype.eager) public list<student> getstudents() {     return students; } public void setstudents(list<student> students) {     this.students = students; }//other gettters & setters omitted 

student.java

@entity public class student {   @id @generatedvalue(strategy=generationtype.auto) private int studentid; private string studentname;   private college college;  @manytoone @joincolumn(name="collegeid") public college getcollege() {     return college; } public void setcollege(college college) {     this.college = college; }//other gettters & setters omitted 

main.java:

public class main {  private static org.hibernate.sessionfactory sessionfactory;    public static sessionfactory getsessionfactory() {     if (sessionfactory == null) {       initsessionfactory();     }     return sessionfactory;   }    private static synchronized void initsessionfactory() {     sessionfactory = new annotationconfiguration().configure().buildsessionfactory();    }    public static session getsession() {     return getsessionfactory().opensession();   }    public static void main (string[] args) {                 session session = getsession();         transaction transaction = session.begintransaction();         college college = new college();         college.setcollegename("dr.mcet");          student student1 = new student();         student1.setstudentname("peter");          student student2 = new student();         student2.setstudentname("john");          student1.setcollege(college);         student2.setcollege(college);            session.save(student1);         session.save(student2);         transaction.commit();   }   } 

console:

 exception in thread "main" org.hibernate.mappingexception: not determine type  for: java.util.list, @ table: college, columns:  [org.hibernate.mapping.column(students)] @ org.hibernate.mapping.simplevalue.gettype(simplevalue.java:306) @ org.hibernate.mapping.simplevalue.isvalid(simplevalue.java:290) @ org.hibernate.mapping.property.isvalid(property.java:217) @ org.hibernate.mapping.persistentclass.validate(persistentclass.java:463) @ org.hibernate.mapping.rootclass.validate(rootclass.java:235) @ org.hibernate.cfg.configuration.validate(configuration.java:1330) @ org.hibernate.cfg.configuration.buildsessionfactory(configuration.java:1833) @ test.hibernate.main.initsessionfactory(main.java:22) @ test.hibernate.main.getsessionfactory(main.java:16) @ test.hibernate.main.getsession(main.java:27) @ test.hibernate.main.main(main.java:43) 

the 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>     <!-- database connection settings -->     <property name="connection.driver_class">com.mysql.jdbc.driver</property>     <property name="connection.url">jdbc:mysql://localhost:3306/dummy</property>     <property name="connection.username">root</property>     <property name="connection.password">1234</property>     <!-- jdbc connection pool (use built-in) -->     <property name="connection.pool_size">1</property>     <!-- sql dialect -->     <property name="dialect">org.hibernate.dialect.mysqldialect</property>     <!-- enable hibernate's automatic session context management -->     <property name="current_session_context_class">thread</property>     <!-- disable second-level cache -->     <property name="cache.provider_class">org.hibernate.cache.nocacheprovider</property>     <!-- echo executed sql stdout -->     <property name="show_sql">true</property>     <!-- drop , re-create database schema on startup -->     <property name="hbm2ddl.auto">update</property>      <mapping class="test.hibernate.student" />     <mapping class="test.hibernate.college" /> </session-factory> 

you using field access strategy (determined @id annotation). put jpa related annotation right above each field instead of getter property

@onetomany(targetentity=student.class, mappedby="college", fetch=fetchtype.eager) private list<student> students;