Hibernate One to One Mapping Annotation Example

thanks but I got How to do it…
I am pasting my example here…

1) AccountEntity.java

package com.hbm;

import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;


@Entity(name = "JoinTableAccountEntity")
@Table(name = "ACCOUNT", uniqueConstraints = {
@UniqueConstraint(columnNames = "ID")})
public class AccountEntity implements Serializable
{

   private static final long serialVersionUID = -6790693372846798580L;

   @Id
   @GeneratedValue(strategy = GenerationType.IDENTITY)
   @Column(name = "ID", unique = true, nullable = false)
   private Integer accountId;

   @Column(name = "ACC_NUMBER", unique = true, nullable = false, length = 100)
   private String accountNumber;
   
   public AccountEntity( String accountNumber) {
	super();
	this.accountNumber = accountNumber;
}

@OneToMany(mappedBy = "accountentity")
   private Set empaccdetail= new HashSet();

   public Set getEmpaccdetail() {
	return empaccdetail;
}

public void setEmpaccdetail(Set empaccdetail) {
	this.empaccdetail = empaccdetail;
}

public Integer getAccountId() {
       return accountId;
   }

   public void setAccountId(Integer accountId) {
       this.accountId = accountId;
   }

   public String getAccountNumber() {
       return accountNumber;
   }

   public void setAccountNumber(String accountNumber) {
       this.accountNumber = accountNumber;
   }
}

2)EmployeeEntity.java

package com.hbm;
import java.io.Serializable;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
 
@Entity
@Table(name = "Employee", uniqueConstraints = {
@UniqueConstraint(columnNames = "ID"),
@UniqueConstraint(columnNames = "EMAIL") })
public class EmployeeEntity implements Serializable
{
    private static final long serialVersionUID = -1798070786993154676L;
 
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "ID", unique = true, nullable = false)
    private Integer employeeId;
 
    public EmployeeEntity(String email, String firstName,
			String lastName) {
		super();
		this.email = email;
		this.firstName = firstName;
		this.lastName = lastName;
	}

	@Column(name = "EMAIL", unique = true, nullable = false, length = 100)
    private String email;
 
    @Column(name = "FIRST_NAME", unique = false, nullable = false, length = 100)
    private String firstName;
 
    @Column(name = "LAST_NAME", unique = false, nullable = false, length = 100)
    private String lastName;
 
    @OneToMany( mappedBy="accountentity")
    private Set empaccdetail;
 
    public Integer getEmployeeId() {
        return employeeId;
    }
 
    public void setEmployeeId(Integer employeeId) {
        this.employeeId = employeeId;
    }
 
    public String getEmail() {
        return email;
    }
 
    public void setEmail(String email) {
        this.email = email;
    }
 
    public String getFirstName() {
        return firstName;
    }
 
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
 
    public String getLastName() {
        return lastName;
    }
 
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

	public Set getEmpaccdetail() {
		return empaccdetail;
	}

	public void setEmpaccdetail(Set empaccdetail) {
		this.empaccdetail = empaccdetail;
	}
}

3)EmpAcc.java (bean for joined table)

package com.hbm;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

@Entity
@Table(name = "Emp_Acc")
public class EmpAcc 
{
	@Id
	 @GeneratedValue
	@Column(name="EMP_ACC_ID")
		private long emp_acc_id;
	
	@ManyToOne(cascade = CascadeType.ALL)
	    @JoinColumn(name = "EID")  
	    private EmployeeEntity employeeentity;
	 
	  @ManyToOne(cascade = CascadeType.ALL)
	    @JoinColumn(name = "AID")
	    private AccountEntity accountentity;
	    public long getEmp_acc_id() {
		return emp_acc_id;
	}
	public void setEmp_acc_id(long emp_acc_id) {
		this.emp_acc_id = emp_acc_id;
	}
	public EmployeeEntity getEmployeeentity() {
		return employeeentity;
	}
	public void setEmployeeentity(EmployeeEntity employeeentity) {
		this.employeeentity = employeeentity;
	}
	public AccountEntity getAccountentity() {
		return accountentity;
	}
	public void setAccountentity(AccountEntity accountentity) {
		this.accountentity = accountentity;
	}
	public int getBalance() {
		return balance;
	}
	public void setBalance(int balance) {
		this.balance = balance;
	}
		private int  balance;
	

}

4)MainClass.java

package com.hbm;

import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
 
public class TestJoinTable
{
    public static void main(String[] args)
    {
        Session session = new Configuration().configure("com/hbm/hibernate.cfg.xml").buildSessionFactory().openSession();
        		session.beginTransaction();
 
        		EmployeeEntity emp=new EmployeeEntity("fdsgf@fgf"," jffksjf"," fdlskf");
        		
        		AccountEntity acc=new AccountEntity("245");
        		        		
        		EmpAcc empAcc=new EmpAcc();
        		empAcc.setEmployeeentity(emp);
        		empAcc.setAccountentity(acc);
        		empAcc.setBalance(3555);
        	
   session.save(empAcc);
    System.out.println("saved ");
        session.getTransaction().commit();

    }
}

In the above example balance is the new column.

Thank you