Java로 간단한 팩토리 패턴을 구현하는 방법에 대한 자세한 설명

public abstract class People {
  public abstract void doSth();
}

public class Man extends People{
  @Override
  public void doSth() {
    System.out.println("I'm a man,I'm coding.");
  }
}

public class Girl extends People{

  @Override
  public void doSth() {
    System.out.println("I'm a girl,I'm eating.");
  }
}

public class PeopleFactory {

  public static People getSpecificPeople(String type){
    if("A-Man".equals(type)){
      return new Man();
    }else if("B-Girl".equals(type)){
      return new Girl();
    }else {
      return null;
    }
  }
}