Not able to access variables of @ConfigurationProperties class using reflection?

Below are the entries which are there in YML files in spring boot project.

  application:
       applicationPath: "/demo"
       defaultFilePath: ${application.applicationPath}childDemo/import_files/
       actDocsPath: ${application.applicationPath}childDemo2/act_docs/
       bgJobsLogs: ${application.applicationPath}childDemo3/bgjobs_logs/

On these location i keep some document in my project.

Requirement is.. on project startup i want to create all these directory structure, so for that i created one class...

        package com.sbill.app.config;
     import org.springframework.beans.factory.annotation.Value;
      import org.springframework.boot.context.properties.ConfigurationProperties;
       import org.springframework.context.annotation.Configuration;


     @Configuration
   @ConfigurationProperties(prefix = "application", ignoreUnknownFields = false)
   public class ApplicationProperties {

 @Value("${application.applicationPath}")
 public String applicationPath;

 @Value("${application.defaultFilePath}")
 public String defaultFilePath;

 @Value("${application.actDocsPath}")
 public String actDocsPath;

 @Value("${application.bgJobsLogs}")
 public String bgJobsLogs;



public String getDefaultFilePath() {
    return defaultFilePath;
}

public void setDefaultFilePath(String defaultFilePath) {
    this.defaultFilePath = defaultFilePath;
}

public String getActDocsPath() {
    return actDocsPath;
}

public void setActDocsPath(String actDocsPath) {
    this.actDocsPath = actDocsPath;
}

public String getBgJobsLogs() {
    return bgJobsLogs;
}

    public String getApplicationPath() {
    return applicationPath;
}

public void setApplicationPath(String applicationPath) {
    this.applicationPath = applicationPath;
}

}

And one class where i have implemnted with commandLineRunner

package com.sbill.app.config;

  import java.io.File;
  import java.lang.reflect.Field;
  import java.util.Optional;

 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.CommandLineRunner;
import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.stereotype.Component;

 import com.sbill.app.domain.User;
import com.sbill.app.repository.UserRepository;
 import com.sbill.app.service.util.FieldReqValidationUtil;

 @Component
 public class SbillStartupRunner implements CommandLineRunner {


@Autowired
ApplicationProperties applicationProperties;

@Override
public void run(String... args) throws Exception {



    System.out.println(applicationProperties.getDefaultFilePath());  
    System.out.println(applicationProperties.getApplicationPath());


    Field[] fields = applicationProperties.getClass().getDeclaredFields();
    for(Field f : fields){
        f.setAccessible(true);
       Class t = f.getType();
       Object v = f.get(applicationProperties);

       File applicationpath = new File(v.toString());
        if (!applicationpath.exists()) {
            if (applicationpath.mkdirs()) {
                System.out.println("Directory is created!");
            } else {
                System.out.println("Failed to create directory!");
            }
        }
       System.out.println(applicationpath.getAbsolutePath());


    }
}

}

Here my problem is :- With setter/getter path is getting print , but using reflection i am not able to access fields..