Spring Framework

<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<bean id="number" class="org.r4r.Complex" factory-method="getNumber" scope="singleton"/>
</beans>

package org.r4r;
public interface Number {
public void display();
public Number add(Number n);
}

package org.r4r;
import java.util.Scanner;
public class Rational implements Number {
int p,q;
public Rational(int p, int q) {
super();
this.p = p;
this.q = q;
}
public static Number getNumber(){
Scanner in=new Scanner(System.in);
System.out.println("Enter the Numerator part:-");
int p=in.nextInt();
System.out.println("Enter the Denominator part:-");
int q=in.nextInt();
return new Rational(p,q);
}
@Override
public Number add(Number n) {
Rational r=(Rational)n;
int x=this.p*r.q+this.q*r.p;
int y=this.q*r.q;
return new Rational(x,y);
}
@Override
public void display() {
System.out.println(p+"/"+q);
}
}

package org.r4r;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
public class IocNumberUser {
public static void main(String[] args) {
Resource r=new ClassPathResource("applicationContext.xml");
BeanFactory f=new XmlBeanFactory(r);
System.out.println("Obtaining numbers n1 & n2 from the IOC Container...");
Number n1=(Number)f.getBean("number");
Number n2=(Number)f.getBean("number");
System.out.println("Number n1 is:");
n1.display();
System.out.println("Number n2 is:");
n2.display();
Number n3=n1.add(n2);
System.out.println("Sum of n1 and n2");
n3.display();
}
}