一個(gè)對(duì)象的內(nèi)存圖:

一個(gè)對(duì)象的內(nèi)存圖

package com.itheima_03;
/*
 * 手機(jī)類
 */
public class Phone {
    String brand;
    int price;
    String color;
    
    public void call(String name) {
        System.out.println("給" + name + "打電話");
    }
    
    public void sendMessage() {
        System.out.println("群發(fā)短信");
    }
}

package com.itheima_03;
/*
 * 手機(jī)類的測試類
 */
public class PhoneDemo {
    public static void main(String[] args) {
        Phone p =new Phone();
        
        System.out.println(p.brand + "---" + p.price + "---" + p.color);
        
        p.brand = "錘子";
        p.price = 2999;
        p.color = "棕色";
        
        System.out.println(p.brand + "---" + p.price + "---" + p.color);
    
        p.call("林青霞");
        p.sendMessage();
    }
}