+-----------+------------+------+-----+---------+-------+
| Field     | Type       | Null | Key | Default | Extra |
+-----------+------------+------+-----+---------+-------+
| personId  | bigint(20) | NO   | PRI | NULL    |       |
| addressId | bigint(20) | NO   |     | NULL    |       |
+-----------+------------+------+-----+---------+-------+

+---------+--------------+------+-----+---------+-------+
| Field   | Type         | Null | Key | Default | Extra |
+---------+--------------+------+-----+---------+-------+
| id      | bigint(20)   | NO   | PRI | NULL    |       |
| address | varchar(200) | YES  |     | NULL    |       |
+---------+--------------+------+-----+---------+-------+

      Session s = sessionFactory.openSession();
      s.beginTransaction();
      Person person = (Person)s.get(Person.class,1);
      System.out.println(person);

Hibernate:
    select
        person0_.personId as personId1_0_,
        person0_.addressId as addressId1_0_
    from
        Person person0_
    where
        person0_.personId=?
Hibernate:
    select
        address0_.id as id2_0_,
        address0_.address as address2_0_
    from
        Address address0_
    where
        address0_.id=?
Hibernate:
    select
        persons0_.addressId as addressId2_1_,
        persons0_.personId as personId1_,
        persons0_.personId as personId1_0_,
        persons0_.addressId as addressId1_0_
    from
        Person persons0_
    where
        persons0_.addressId=?
Exception in thread "main" java.lang.StackOverflowError
   at java.lang.AbstractStringBuilder.<init>(AbstractStringBuilder.java:44)
   at java.lang.StringBuilder.<init>(StringBuilder.java:92)
   at com.test.app.Address.toString(Address.java:16)
   at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:197)
   at com.test.app.Address_$$_javassist_1.toString(Address_$$_javassist_1.java)
   at java.lang.String.valueOf(String.java:2826)
   at java.lang.StringBuilder.append(StringBuilder.java:115)
   at com.test.app.Person.toString(Person.java:35)
   at java.lang.String.valueOf(String.java:2826)
   at java.lang.StringBuilder.append(StringBuilder.java:115)
   at java.util.AbstractCollection.toString(AbstractCollection.java:422)
   at org.hibernate.collection.PersistentSet.toString(PersistentSet.java:333)
   at java.lang.String.valueOf(String.java:2826)
   at java.lang.StringBuilder.append(StringBuilder.java:115)
   at com.test.app.Address.toString(Address.java:17)
   at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:197)
   at com.test.app.Address_$$_javassist_1.toString(Address_$$_javassist_1.java)
   at java.lang.String.valueOf(String.java:2826)
   at java.lang.StringBuilder.append(StringBuilder.java:115)
   at com.test.app.Person.toString(Person.java:35)
   at java.lang.String.valueOf(String.java:2826)
   at java.lang.StringBuilder.append(StringBuilder.java:115)
   at java.util.AbstractCollection.toString(AbstractCollection.java:422)

<hibernate-mapping package="com.test.app">
   <class name="Person" table="Person" lazy="false">
      <id name="personId" column="personId"/>
      <!-- <property name="addressId" column="addressId"/> -->
      <many-to-one name="address"
                   column="addressId" not-null="true"/>
   </class>
   <class name="Address" table="Address">
      <id name="id" column="id"/>
      <property name="addressLine" column="address"/>
      <set name="persons" inverse="true" cascade="all">
         <key column="addressId"/>
         <one-to-many class="Person"/>
      </set>
   </class>
</hibernate-mapping>

public class Person {
   private Integer personId;
   private Address address;

   public Integer getPersonId() {
      return personId;
   }

   public void setPersonId(Integer personId) {
      this.personId = personId;
   }

   public Address getAddress() {
      return address;
   }

   public void setAddress(Address address) {
      this.address = address;
   }

   @Override
   public String toString() {
      return "Person [personId=" + personId
            + ", address=" + address + "]";
   }

}

public class Address {
   private Integer id;
   private String addressLine;
   Set<Person> persons;

   public Integer getId() {
      return id;
   }

   @Override
   public String toString() {
      return "Address [id=" + id + ", addressLine=" + addressLine
            + ", persons=" + persons + "]";
   }

   public void setId(Integer id) {
      this.id = id;
   }

   public String getAddressLine() {
      return addressLine;
   }

   public void setAddressLine(String addressLine) {
      this.addressLine = addressLine;
   }

   public Set<Person> getPersons() {
      return persons;
   }

   public void setPersons(Set<Person> persons) {
      this.persons = persons;
   }

}