网站开发命名规范赣州章贡区地图
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
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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