Spring Framework- inner bean example

Spring framework  contain different types of bean properties injctions provided.one of them is inner bean injection.this is look like java inner classes,classes that are defined with in the scope of other class is known as inner class. similarly inner beans are beans that are defined with in the scope of another bean. To illustrate this let see a example-
Directory structure of project -

Class Point.java

package com.test;

public class Point {
private int x,y;
public int getY() {
return y;
}
public void setY(int y) {
this.y = y;
}
public int getX() {
return x;
}
public void setX(int x) {
this.x = x;
}
public Point(int x, int y) {
super();
this.x = x;
this.y = y;
}
public Point() {
super();
}
}

Class Circle.java

package com.test;

public class Circle {

private Point p;

public Point getP() {
return p;
}

public void setP(Point p) {
this.p = p;
}

public void show()
{
System.out.println("Points are:\n X="+p.getX()+"\n Y="+p.getY());
}

}

Class Main.java

package com.test;

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

public class Main {

public static void main(String args[]) {
ApplicationContext ctx=new ClassPathXmlApplicationContext("spring.xml");
ctx.getBean("circle", Circle.class).show();
}
}

Spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
<bean id="circle" class="com.test.Circle">
<property name="p" >
<bean class="com.test.Point">
<property name="x" value="10"></property>
<property name="y" value="30"></property>
</bean>
</property>
</bean>
</beans>

Here com.test.Point is inner bean which have no reference and id. this bean is define in scope of another bean so this work as  private bean.

Output is-

Points are:
X=10
Y=30

For Further Reading,

General, Java, spring