Java图文分析之继承内存布局

public class Person {
    public int age;

    public void smile() {
        System.out.println("Person_smile()_age_" + age);
    }
}

class Student extends Person {
    public double score;

    public void study() {
        System.out.println("Student_study()_score_" + score);
    }
}

class MainTest {
    public static void main(String[] args) {
        Student s = new Student();
        s.score = 95.5;
        s.age = 8;
        // Person_smile()_age_8
        s.smile();
        // Student_study()_score_95.5
        s.study();

        Person p = new Person();
        p.age = 15;
        // Person_smile()_age_15
        p.smile();
    }
}

public class Person {
    public int money = 10000;
}

class Teacher extends Person {
    public int money = 22222;

    public void show() {
        System.out.println("money: " + money);
        System.out.println("this.money: " + this.money);
        System.out.println("super.money: " + super.money);
    }
}

class Main {
    public static void main(String[] args) {
        Teacher t = new Teacher();
        t.show();

        /*
            output:
                money: 22222
                this.money: 22222
                super.money: 10000
         */
    }
}

public class Test {
    public static void main(String[] args) {
        Son son = new Son();
    }
}

class Grandfather {
    String name = "Grandfather_name";
    String hobby = "Grandfather_hobby";
}

class Father extends Grandfather {
    String name = "Father_name";
    int money = 66666;
}

class Son extends Father {
    String name = "Son_name";
}