Java编译时类型和运行时类型的区别

class Person {
    public String name;

    public Person() {
        name = "Person";
    }

    public String getName() {
        return name;
    }
}

class Student extends Person {
    public String name;

    public Student() {
        name = "Student";
    }

    public String getName() {
        return name;
    }
}

public class Hello {
    public static void main(String[] args) {
        Person person = new Student();
        System.out.println(person.name); // Person
        System.out.println(person.getName()); // Student
    }
}