```java
	 String result = scanner.next();
     if ("Y".equals(result) || "y".equals(result)) {
     	 //students.remove(students.get(num));
         students.remove((int)num);//num是Integer数据类型，引用数据类型，remove重载方法接收int或Object；
         System.out.println("删除成功");
            }