springIOC: Spring Bean Life Cycle(default init and destroy Methods)

HelloWorld.java
================

package myspring;

public class HelloWorld {
    private String message;
    
    public void init(){
    
        System.out.println("I am Init()");
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
       // System.out.println("I am setter....");
        this.message = message;
    }


    
    public void destroy(){
    
        System.out.println("I am destroy()");
    }   
    
}
HelloIndia.java
=================

package myspring;

public class HelloIndia {
    private String indiaMessage;

    public String getIndiaMessage() {
        return indiaMessage;
    }

    public void setIndiaMessage(String indiaMessage) {
        this.indiaMessage = indiaMessage;
    }
        public void init(){
    
        System.out.println("I am Init()");
    }
        
    public void destroy(){    
        System.out.println("I am destroy()");
    }
    
}


Beans.xml
===========
<?xml version="1.0" encoding="UTF-8"?>
<!--
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

    <bean id="helloWorld" class="myspring.HelloWorld" init-method="init" destroy-method="destroy" >    
        <property name="message" value="Hi Hello World" > </property>
    </bean>
    <bean id="helloIndia" class="myspring.HelloWorld" init-method="init" destroy-method="destroy" >    
        <property name="message" value="Hi Hello India" > </property>
    </bean>
    -->
    
    <beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd" default-init-method="init" default-destroy-method="destroy" >

    <bean id="helloWorld" class="myspring.HelloWorld" >    
        <property name="message" value="Hi Hello World" > </property>
    </bean>
    <bean id="helloIndia" class="myspring.HelloWorld" >    
        <property name="message" value="Hi Hello India" > </property>
    </bean>


</beans>

Test.java
===========
package myspring;

import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {

      public static void main(String[] args) {
          AbstractApplicationContext context = new ClassPathXmlApplicationContext("Beans.xml");
          HelloWorld helloWorld = (HelloWorld)context.getBean("helloWorld");
          HelloWorld helloIndia = (HelloWorld)context.getBean("helloIndia");
          
          System.out.println(helloWorld.getMessage());
          System.out.println(helloIndia.getMessage());
          context.registerShutdownHook();
         //if we comment above line it will not call destroy() method. 
    }
    
}