java - Autowiring required beans -

i trying wire beans using annotations.. when beans not present in beans.xml config file, getting null pointer exception.. expect required=false attribute fix this.. fair expectation? if so, why still throwing exception if set required false missing bean...

package com.rajkumar.spring;  import org.springframework.beans.factory.annotation.autowired;  public class log {      private consolewriter consolewriter;     private filewriter filewriter;       @autowired     public void setconsolewriter(consolewriter consolewriter) {         this.consolewriter = consolewriter;     }      @autowired(required=false)     public void setfilewriter(filewriter filewriter) {         this.filewriter = filewriter;     }      public void writetofile(string message) {         filewriter.write(message); // throwing error bean comments in xml file..     }      public void writetoconsole(string message) {         consolewriter.write(message);     }   } 

my beans.xml below..

<?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:context="http://www.springframework.org/schema/context"     xsi:schemalocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">       <bean id="log" class="com.rajkumar.spring.log"></bean>     <bean id="consolewriter"         class="com.rajkumar.spring.consolewriter">     </bean>     <!-- <bean id="filewriter" class="com.rajkumar.spring.filewriter"></bean> -->     <context:annotation-config></context:annotation-config> </beans> 

required=false make spring container dependency checking optional , avoids correpsonding bean not found exception like.. required bean of type 'com.rajkumar.spring.filewriter' not found.

please note injected object still null here, hence seeing nullpointerexception.

hope helps you.