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<div dir="ltr" style="text-align: justify;" trbidi="on"><b>In <a href="https://dineshonjava.com/2012/07/spring-autowired-annotation.html">previous chapter</a>, In <a href="https://dineshonjava.com/2012/07/spring-autowired-annotation.html">@Autowired annotation</a>,</b> The <b style="color: blue;">@Autowired</b><a href="https://dineshonjava.com/2012/07/spring-autowired-annotation.html"> annotation</a> is auto wire the bean by matching <b style="color: blue;"><a href="https://dineshonjava.com/2012/06/spring-autowiring-by-type.html">data type</a> </b>if <b><a href="https://dineshonjava.com/2012/06/spring-ioc-container.html">spring container</a></b> find more than one beans same <a href="https://dineshonjava.com/2012/06/spring-autowiring-by-type.html"><b>data type</b></a> then it find <a href="https://dineshonjava.com/2012/06/spring-autowiring-by-name.html"><b>by name</b></a>. <b>Suppose if </b><b><a href="https://dineshonjava.com/2012/06/spring-autowiring-by-name.html">by name</a> it is not find any bean, then what will be do for wiring a bean from <a href="https://dineshonjava.com/2012/06/dependency-injection-in-spring.html">dependency injection</a></b>?</p>
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<p><b><br />
</b> <b>So for avoid this type problem we can use the one more annotation <i>@Qualifier</i><i> </i>along with the <i>@Autowired</i> annotation </b><b>remove the confusion by specifying which exact bean will be wired.</b> ;<br />
 ;Below is an example to show the use of <i><b>@Qualifier</b></i> annotation.</p>
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<p><b>Circle.java</b></p>
<pre class="highlight" name="code">package com.dineshonjava.sdnext.autowiredannotation.tutorial;

import org.springframework.beans.factory.annotation.Autowired;

public class Circle
{ 
 private Point center;
 //using autowired annotation with setter method
//using qualifier annotation for exact bean will be wired
 @Autowired
 @Qualifier("circleBean")
 public void setCenter(Point center) 
 {
 this.center = center;
 }

 public void draw() 
 {
System.out.println("Circle is drawn of center ("+center.getX()+", "+center.getY()+")");
 }
}
</pre>
<p>
<b>Point.java</b></p>
<pre class="highlight" name="code">package com.dineshonjava.sdnext.autowiredannotation.tutorial;

public class Point
{
 private int x;
 private int y;
 /**
 * @return the x
 */
 public int getX() {
 return x;
 }
 /**
 * @param x the x to set
 */
 public void setX(int x) {
 this.x = x;
 }
 /**
 * @return the y
 */
 public int getY() {
 return y;
 }
 /**
 * @param y the y to set
 */
 public void setY(int y) {
 this.y = y;
 }
}
</pre>
<p><b>DrawingApp.java</b></p>
<pre class="highlight" name="code">package com.dineshonjava.sdnext.autowiredannotation.tutorial;

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

/**
 * @author Dinesh Rajput
 *
 */
public class DrawingApp
{
 /**
 * @param args
 */
 public static void main(String[] args) 
 {
ApplicationContext context = new ClassPathXmlApplicationContext("spring.xml");
Circle circle = (Circle) context.getBean("circle");
circle.draw();
 }
}
</pre>
<p><b>spring.xml</b></p>
<pre class="highlight" name="code"><;beans xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xmlns:></p>
<div style="color: #274e13;">Once you are done with creating source and bean configuration files, let us run the application. If everything is fine with your application, this will print the following message:</p>
</div>
<div style="background-color: #ff99cc; border-width: thin; border: solid;">
<div style="color: blue;"><b>Output:</b></div>
<div style="color: red;">Jul 11, 2012 11:23:36 PM org.springframework.context.support.AbstractApplicationContext prepareRefresh</div>
<div style="color: red;">INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@ab50cd: startup date [Wed Jul 11 23:23:36 IST 2012]; root of context hierarchy</div>
<div style="color: red;">Jul 11, 2012 11:23:36 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions</div>
<div style="color: red;">INFO: Loading XML bean definitions from class path resource [spring.xml]</div>
<div style="color: red;">Jul 11, 2012 11:23:36 PM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons</div>
<div style="color: red;">INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@bd928a: defining beans [circle,pointA,pointB,pointC,center,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.ConfigurationClassPostProcessor$ImportAwareBeanPostProcessor#0]; root of factory hierarchy</div>
<p><b>Circle is drawn of center (0, 0)</b></div>
</div>
<p></p>
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