java父类继承问题

尚学堂 马士兵老师的一个例子 敲了程序结果不对
程序如下：

class Person {
private String name;
private String location;

Person(String name) {
this.name = name;
location = "Beijing";
}

Person(String name, String location) {
this.name = name;
this.location = location;
}

public String info() {
return "name: " + name + "\nlocation: " + location;
}
}

class Student extends Person {
private String school;

Student(String name, String school) {
this(name, "Beijing", school);
}

Student(String n, String l, String s) {
super(n, l);
this.school = school;
}

public String info() {
return super.info() + "\nschool: " + school;
}
}

public class TestSuperSubPersonStudent {
public static void main(String[] args) {
Person p1 =

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