题解 | #定义打印方法#

import java.util.*;

public class Main {

    public static void main(String[] args) throws Exception {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()) {
            String className = scanner.next();
            //System.out.println(Class.forName(className).getClass());
            // print就是需要你定义的方法
            print(Class.forName(className).newInstance());
        }
        //使用getClass.getName获取对象类型和对象名  
    }
    
    //必须要用静态方法
    public  static void  print(Object test){
          System.out.println(test.getClass().getName());
    }

    //write your code here......
    
}

class First {
    public String toString() {
        return "First";
    }
}

class Second {
    public String toString() {
        return "Second";
    }
}

class Third {
    public String toString() {
        return "Third";
    }
}