Inject_demo.txt

Create a maven project, select quick start archetype.

give proper name for group id and artifact id

set jdk version to 8

add proper dependency to pom.xml to download Spring 5 jar

<dependency>
  	<groupId>org.springframework</groupId>
  	<artifactId>spring-core</artifactId>
  	<version>5.0.5.RELEASE</version>
  </dependency>
  <dependency>
  	<groupId>org.springframework</groupId>
  	<artifactId>spring-beans</artifactId>
  	<version>5.0.5.RELEASE</version>
  </dependency>
  <dependency>
  	<groupId>org.springframework</groupId>
  	<artifactId>spring-context</artifactId>
  	<version>5.0.5.RELEASE</version>
  </dependency>
  <dependency>
  	<groupId>junit</groupId>
  	<artifactId>junit</artifactId>
  	<version>4.12</version>
  </dependency>
  

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package com.suzuki.SampleInjectDemo;

public interface 	 {

public String getWriter();
	
}

-----------------------

package com.suzuki.SampleInjectDemo;

import org.springframework.stereotype.Service;

@Service
public class CallWriter implements Writer{

	

	public String getWriter() {
		// TODO Auto-generated method stub
		return "i am here yes tell me";
	}

}

-------------------------

package config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.beans.factory.annotation.Autowired;
import com.suzuki.SampleInjectDemo.*;
@Configuration
@ComponentScan(basePackages="com.suzuki")
public class AppConfig {

	@Autowired(required=true)
	CallWriter callWriter;  //DI 
	
	
	@Bean(name="dataSource")
	public String dataSource() {
				
		return callWriter.getWriter();
	}
}


	

--------------------

package com.suzuki.SampleInjectDemo;



import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.AbstractApplicationContext;



import config.AppConfig;

/**
 * Hello world!
 *
 */
public class App 
{
    public static void main( String[] args )
    {
       // System.out.println( "Hello World!" );
    	 AbstractApplicationContext ctx=new   
    			 AnnotationConfigApplicationContext(AppConfig.class);
    	String  h= (String)ctx.getBean("dataSource");
    	System.out.println(h);
    	
    
      
    }
}