为什么我写的toString方法实现不了

Question

class Person {
String name;
int age;
public void setName(String name) {
this.name = name;
}
public void setAge(int age) {
this.age = age;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}

public void f() {
    System.out.println( "name:" + name.toString() +" age:" + age );
}

}
class Student extends Person {

String school;
public void setSchool(String school) {
    this.school = school;
}
public String getSchool() {
    return school;
}
/*public void f() {
    System.out.println( "name:" + name +" age:" + age + " school:" + school );
}*/
public  String toString() {
    return "none";
}

}

public class TestPerson {
public static void main(String[] args) {
Student s = new Student();
s.setSchool("SCH");
s.setName("LJW");
s.setAge(18);
System.out.println( "name:" + s.name +" age:" + s.age + " school:" + s.school );
}
}

在上面Student这个类中重写了toString方法，却没有起到任何效果，求解答，非常感谢

Answer 1

你重写了，但是没有调用。
System.out.println(s.toString());