目录

学生类

单个对象内存图

多个对象指向同一个内存地址

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学生类

Student.java如下：

package com.面向对象;

public class Student {
    String name;
    int age;

    public void work() {
        System.out.println("开始敲代码...");
    }
}

StudentDemo.java如下：

package com.面向对象;

public class StudentDemo {
    public static void main(String[] args) {
        Student mayiktStudent = new Student(); // new Student()存放堆内存，mayiktStudent存放在栈内存，直接引用到堆内存地址
        System.out.println(mayiktStudent);
        mayiktStudent.name = "mayikt";
        mayiktStudent.age = 21;
        System.out.println(mayiktStudent.name + "-" + mayiktStudent.age);
        mayiktStudent.work();
    }
}

单个对象内存图

多个对象指向同一个内存地址

 StudentDemo.java如下：

package com.面向对象;

public class StudentDemo {
    public static void main(String[] args) {
        Student mayiktStudent = new Student(); // new Student()存放堆内存，mayiktStudent存放在栈内存，直接引用到堆内存地址
        System.out.println(mayiktStudent);
        mayiktStudent.name = "mayikt";
        mayiktStudent.age = 21;
        System.out.println(mayiktStudent.name + "-" + mayiktStudent.age);
        mayiktStudent.work();
//        Student xiaojunStudent = new Student();
        Student xiaojunStudent = mayiktStudent; //将mayiktStudent的堆内存地址复制给xiaojunStudent
        System.out.println(xiaojunStudent); // 可以看到这个内存地址与mayiktStudent的内存地址一样
        xiaojunStudent.nage = "xiaojun";
        xiaojunStudent.age = 21;
        System.out.println(mayiktStudent.name + "-" + mayiktStudent.age); // 现在两个对象使用的是一个内存地址，
        System.out.println(xiaojunStudent.name + "-" + xiaojunStudent.age); //所以两个对象的属性值一样
        xiaojunStudent.work();
    }
}

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