Android-Java-对象在内存中的简单关系图

代码案例一：

package android.java.oop02;

class Student {

    public int age;
    public String name;

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

public class OopDemo01 {

    public static void main(String[] args) {
        Student s = new Student();
    }

}

代码案例一 对应的内存图：

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代码案例二：

package android.java.oop02;

class Student {

    public int age;
    public String name;

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

public class OopDemo01 {

    public static void main(String[] args) {
        Student s = new Student();
        s.age = 19;
        s.name = "mcc";
        s.show();
    }

}

代码案例二对应的内存图：

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代码案例三：

package android.java.oop02;

class Teacher {

    public int age;
    public String name;

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

public class OopDemo02 {

    public static void main(String[] args) {
        Teacher t = new Teacher();
        t.age = 39;
        t.name = "www";

        Teacher t2 = t;
        t2.age = 99;
        t2.name = "JACK";

        t.show();
    }

}

执行结果：

age:99 name:JACK

代码案例三对应内存图：