Java.xml.bind.JAXBElement.setNil() Method

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Description

The Java.xml.bind.JAXBElement.setNil(boolean value) method set element's content as nil if value passed is true.

Declaration

Following is the declaration for java.xml.bind.JAXBElement.setNil(boolean value) method −

public boolean setNil(boolean value)

Parameters

value − true if this element has nil content false otherwise.

Return Value

NA

Exception

NA

Example

The following example shows the usage of java.xml.bind.JAXBElement.setNil() method. To proceed, consider the following Student class which will be used to have objects for marshalling and unmarshalling purposes −

package com.tutorialspoint;

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
 
@XmlRootElement
public class Student{
 
   String name;
   int age;
   int id;

   public String getName(){
      return name;
   }

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

   public int getAge(){
      return age;
   }

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

   public int getId(){
      return id;
   }

   @XmlAttribute
   public void setId(int id){
      this.id = id;
   }  
}

Now let us create main class which will show the usage of java.xml.bind.JAXBElement.setNil() method. Here we will create a JAXBElement of a Student object and then get the class of Student. This example set the value of JAXBElement object as Nil and prints the result.

package com.tutorialspoint;

import javax.xml.bind.JAXBElement;
import javax.xml.namespace.QName;

public class JAXBElementDemo {
   public static void main(String[] args) {
      //Create a student object
      Student student = new Student();

      //fill details of the student
      student.setName("Robert");
      student.setId(1);
      student.setAge(12);
      
      //create JAXBElement of type Student
      //Pass it the student object
      JAXBElement<Student> jaxbElement =  new JAXBElement( 
         new QName(Student.class.getSimpleName()), Student.class, student);

      //set content as Nil
      jaxbElement.setNil(true);

      //print the result
      System.out.println("Is Nil: "+jaxbElement.isNil());   
   }
}

Let us compile and run the above program, this will produce the following result −

Is Nil: true