多态数组创建test方法编译挂了

Question

跟着老湿写的这个多态练习，父类Person,子类Student、Teacher。在主函数中创建test方法，用来判断对象运行类型并进行相应转型，然后调用对应方法。可是在main函数末尾创建test方法时，一直报错，提示需要）什么的，见图如下，蒙圈中，救我

```java
package homework13;

public class HomeWork13 {
    public static void main(String[] args) {
        Person[] persons = new Person[4];
        persons[0] = new Student("池池", '女', 37, "011000001259");
        persons[1] = new Student("会会", '女', 35, "011000008888");
        persons[2] = new Teacher("顺顺", '男', 45, 19);
        persons[3] = new Teacher("平平", '男', 39, 25);
        System.out.println("排序前：");
        for(int i = 0; i < persons.length; i++) {
            persons[i].info();


        }
        Person temp = null;
        for (int i = 0; i < persons.length - 1; i++) {
            for (int j = 0; j < persons.length - 1-i; j++) {
                if(persons[j].getAge() > persons[j+1].getAge()){
                    temp = persons[j];
                    persons[j]=persons[j+1];
                    persons[j+1]=temp;
                }
            }
        }
        System.out.println("排序后：");
        for (int i = 0; i < persons.length; i++) {
            persons[i].info();

        }
        public void test(Person p){
            if(p instanceof Student){
                ((Student)p).study();
            }
            if(p instanceof Teacher){
                ((Teacher)p).teach();
            }
            System.out.println("传参错误");
        }
    }
}

```

Answer 1

我自己已经解决，谢谢，test方法不能写在主函数里，应该写在与主函数并列的位置，我悟了，小白的多么痛的领悟