//抽象产品类：Person接口
public interface Person {
   void create();
}

//具体产品类：Man（男人）类
public class Man implements Person{
   public Man() {
   }

   @Override
   public void create() {
       System.out.println("造男人");
   }
}

//具体产品类：Woman（女人）类
public class Woman implements Person{
   public Woman() {
   }

   @Override
   public void create() {
       System.out.println("造女人");
   }
}

//具体产品类：Robot（机器人）类
public class Robot implements Person{
   public Robot() {
   }

   @Override
   public void create() {
       System.out.println("造机器人");
   }
}

//工厂类：Nvwa（女娲）类
public class Nvwa {
   public static Person getPerson(String person) throws Exception {
       if (person.equalsIgnoreCase("M")){
           return new Man();
       }else if (person.equalsIgnoreCase("W")){
           return new Woman();
       }else if (person.equalsIgnoreCase("R")){
           return new Robot();
       }else {
           throw new Exception("对不起，不能造该类人");
       }
   }
}

import java.util.Scanner;

//测试类
public class Main {
   public static void main(String[] args) throws Exception {
       Scanner type = new Scanner(System.in);
       System.out.print("请输入参数： ");
       String s = type.nextLine();
       Person person = Nvwa.getPerson(s);
       person.create();
       type.close();
   }
}