【Java】对象内存图多个对象同一内存地址

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xiaojunStudentSystem.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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