Java Class return Xml file with Bean class data

package com.asman;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
class Student{
  private String gender;

  private String name;

  private int age;

  public String getGender() {
    return gender;
  }

  public void setGender(String gender) {
    this.gender= gender;
  }

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public int getAge() {
    return age;
  }

  public void setAge(int age) {
    this.age= age;
  }
}



package com.asman;

import java.beans.XMLEncoder;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
public class BeanToXMLExp {
public static void main(String[] args) throws Exception {
   JAXBContext contextObj = JAXBContext.newInstance(Student.class);

   Marshaller marshallerObj = contextObj.createMarshaller();
   marshallerObj.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

   Student myStudent = new Student();
   myStudent.setGender("M");
   myStudent.setName("Amar");
   myStudent.setAge(20);
//our xml file store d: directory
   marshallerObj .marshal(myStudent, new FileOutputStream("d:\\Student.xml"));


 }
}

output:
--------
student.xml
-----------

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<student>
    <age>20</age>
    <gender>M</gender>
    <name>Amar</name>
</student>