import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.annotation.*;
import java.io.StringReader;
import java.io.StringWriter;
 
@XmlRootElement(name = "employee")
@XmlAccessorType(XmlAccessType.FIELD)
public class Employee
{
    public static void main(String args[]) throws JAXBException
    {
        final Employee john = new Employee();
        john.setId(1);
        john.setFirstName("John");
        john.setMiddleName("Robert");
        john.setLastName("Doe");
 
        // write it out as XML
        final JAXBContext jaxbContext = JAXBContext.newInstance(Employee.class);
        StringWriter writer = new StringWriter();
        jaxbContext.createMarshaller().marshal(john, writer);
 
        // read it from XML
        final Employee johnRead =
            (Employee) jaxbContext.createUnmarshaller().unmarshal(
                new StringReader(writer.toString()));
        if (john.equals(johnRead))
        {   // write the new object out as XML again.
            writer = new StringWriter();
            jaxbContext.createMarshaller().marshal(johnRead, writer);
            System.out.println(
                "johnRead was identical to john: \n" + writer.toString());
        }
        else
        {
            System.out.println("john and johnRead are not equal");
        }
    }
 
    @XmlAttribute
    private int id;
 
    /**
     * Employee's first name
     */
    @XmlElement
    private
    String firstName;
 
    /**
     * Employee's middle name
     */
    @XmlElement
    private
    String middleName;
 
    /**
     * Employee's last name
     */
    @XmlElement
    private
    String lastName;
 
    public Employee()
    {
    }
 
    public int getId()
    {
        return id;
    }
 
    public void setId(int id)
    {
        this.id = id;
    }
 
    public String getLastName()
    {
        return lastName;
    }
 
    public void setLastName(String lastName)
    {
        this.lastName = lastName;
    }
 
    public String getMiddleName()
    {
        return middleName;
    }
 
    public void setMiddleName(String middleName)
    {
        this.middleName = middleName;
    }
 
    public String getFirstName()
    {
        return firstName;
    }
 
    public void setFirstName(String firstName)
    {
        this.firstName = firstName;
    }
 
    @Override
    public boolean equals(Object o)
    {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
 
        Employee employee = (Employee) o;
 
        if (id != employee.id) return false;
        if (firstName != null ? !firstName.equals(employee.firstName) :
            employee.firstName != null) return false;
        if (lastName != null ? !lastName.equals(employee.lastName) :
            employee.lastName != null) return false;
        if (middleName != null ? !middleName.equals(employee.middleName) :
            employee.middleName != null) return false;
 
        return true;
    }
 
    @Override
    public int hashCode()
    {
        int result = id;
        result = 31 * result + (firstName != null ? firstName.hashCode() : 0);
        result = 31 * result + (middleName != null ? middleName.hashCode() : 0);
        result = 31 * result + (lastName != null ? lastName.hashCode() : 0);
        return result;
    }
 
    @Override
    public String toString()
    {
        return "Employee{" +
            "id=" + id +
            ", firstName='" + firstName + '\'' +
            ", middleName='" + middleName + '\'' +
            ", lastName='" + lastName + '\'' +
            '}';
    }
}

javac -classpath .:$(for jar in libs/*.jar; do echo -n "$jar:"; done) Employee.java
java -classpath .:$(for jar in libs/*.jar; do echo -n "$jar:"; done) Employee

johnRead was identical to john:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<employee id="1">
 <firstName>John</firstName>
 <middleName>Robert</middleName>
 <lastName>Doe</lastName>
</employee>