创建对象内存分析

Application

package com.oop;

import com.oop.demo02.Person;
import com.oop.demo03.Pet;

//一个项目应该只存在一个main方法
public class Application {
    public static void main(String[] args) {
        //new关键词实例化一个对象
        Person person = new Person("kuangshen",20);

        System.out.println(person.name);

        Pet dog = new Pet();
        dog.name = "wangcai";
        dog.age = 3;
        dog.shout();

        System.out.println(dog.name);
        System.out.println(dog.age);

        Pet cat = new Pet();

    }
}
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Pet类

package com.oop.demo03;

public class Pet {
    public String name;
    public int age;

    //无参构造
    public void shout(){
        System.out.println("wangwang");
    }
}
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