mvc 유형별 패턴연습 예제3

factory 패턴에서 return 에 객체 생성되는건 첨봐서 이해가 어렵습니다. 

 commandIF = new RegCommand()에서->  return new Regommand(); 

;;궁금한건  new RegCommand()를 담아줄 commandIF가 없으면 객체가 생생될수 없지 않나요? 

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public class CommandFactory {
 private CommandFactory private static CommandFactory instance = new CommandFactory public static CommandFactory getInstance(){

  return instance;
 }
  public CommandIF createCommand(String cmd  if(cmd.equals("REG")){
    }
  else if(cmd.equals("CONFIRM")){
   return new ConfirmCommand();
  }
  else if(cmd.equals("SAVE")){
   return new SaveCommand();
  }
  
  }  }