Java.xml.bind.JAXBElement.setValue() Method Example

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Description

The Java.xml.bind.JAXBElement.setValue() method sets the content model and attributes of this xml element.

Declaration

Following is the declaration for java.xml.bind.JAXBElement.setValue() method −

public void setValue(T t)

Parameters

content − object containing content model and attributes of a corresponding xml element

Return Value

NA

Exception

NA

Example

The following example shows the usage of java.xml.bind.JAXBElement.setValue() 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;
   }
  
   public String toString() {
      StringBuilder stringBuilder = new StringBuilder();
      stringBuilder.append("Student [");
      stringBuilder.append("ID = ");
      stringBuilder.append(id);
      stringBuilder.append(", Name = ");
      stringBuilder.append(name);
      stringBuilder.append(", Age = ");
      stringBuilder.append(age);
      stringBuilder.append("]");
      return stringBuilder.toString();
   }
}

Now let us create main class which will show the usage of java.xml.bind.JAXBElement.setValue() method. Here we will create a JAXBElement of a Student object and then check content model.Then this example set the content model as the Student object 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 a null object
      JAXBElement<Student> jaxbElement =  new JAXBElement( 
         new QName(Student.class.getSimpleName()), Student.class, null);

      Student retrivedStudent;

      //check if content model not null
      if(!jaxbElement.isNil()){
         //get the content values as Student object
         retrivedStudent = jaxbElement.getValue();
         //print the result
         System.out.println("Student #1: "+retrivedStudent.toString());  
      } else {
         jaxbElement.setValue(student);   		  
      }

      //get the content values as Student object
      retrivedStudent = jaxbElement.getValue();
	  
      //print the result
      System.out.println("Student #2:"+retrivedStudent.toString());  
   }
}

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

Student #2:Student [ID = 1, Name = Robert, Age = 12]