final class Person {

      private String name;

      // Below cohesive properties
      private String homeAreaCode;
      private String homeNumber;

      public String name() {
          return name;
      }

      // Below cohesive behaviour
      public String telephoneNumber() {
          return ("(" + homeAreaCode + ") " + homeNumber);
      }
      String areaCode() {
          return homeAreaCode;
      }
      String officeNumber() {
          return officeNumber;
      } 
 }

// 1. Extract the methods (and accidentally the properties) coupled into a new concept      
   public class TelephoneNumber {

      private String number;
      private String areaCode;

      public String telephoneNumber() {
          return ("(" + areaCode + ") " + _number);
      }
      public String areaCode() {
          return areaCode;
      }
      public String number() {
          return number;
      }
   }

final class Person {

      private String name;

      // 2. Use the new concept
      private TelephoneNumber officeTelephone = new TelephoneNumber();

      public String name() {
          return name;
      }
      public String telephoneNumber(){
          return officeTelephone.getTelephoneNumber();
      }

  }