对象内存图

一个对象内存图

public class Phone {
    String brand; //品牌
    double price; //价格
    String color; //颜色

    //打电话
    public void call(String who){
        System.out.println("给"+who+"打电话");
    }
    //发短信
    public void sendMessage(){
        System.out.println("发短信");
    }
}

public static void main(String[] args) {
        Phone phone = new Phone();
        phone.brand = "苹果";
        phone.price = 10000;
        phone.color = "黑色";
        System.out.println(phone.brand);
        System.out.println(phone.price);
        System.out.println(phone.color);
        System.out.println("===========");
        phone.call("乔布斯");
        phone.sendMessage();
    }

 

 

 

 

两个对象使用同一个方法的内存图

public class Phone {
    String brand; //品牌
    double price; //价格
    String color; //颜色

    //打电话
    public void call(String who){
        System.out.println("给"+who+"打电话");
    }
    //发短信
    public void sendMessage(){
        System.out.println("发短信");
    }
}

public class PhoneTest {
    public static void main(String[] args) {
        Phone phone = new Phone();
        phone.brand = "苹果";
        phone.price = 10000;
        phone.color = "黑色";
        System.out.println(phone.brand);
        System.out.println(phone.price);
        System.out.println(phone.color);
        phone.call("乔布斯");
        phone.sendMessage();
        System.out.println("=================");
        Phone ban = new Phone();
        ban.brand = "香蕉";
        ban.price = 50000;
        ban.color = "蓝色";
        System.out.println(ban.brand);
        System.out.println(ban.price);
        System.out.println(ban.color);
        ban.call("猴");
        ban.sendMessage();
    }
}