对象关联

对象关联

[TOC]

含义

一个对象 又引用了另一个对象

其实就是 一个类中的属性类型 为引用类型

内存图

image

代码

//案例 教师使用电脑

package been;

public class Teacher {
    private String name;
    private Computer computer;
    
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    
    public Computer getComputer() {
        return computer;
    }
    public void setComputer(Computer computer) {//Computer 类型
        this.computer = computer;
    }
    
    public String getInfo(){
        return name +"\t"+computer.getDetails();
    }

}

package demo1;

import been.Computer;
import been.Teacher;

public class TestObjectRelation {
    public static void main(String[] args) {
        Teacher t = new Teacher();
        
        t.setName("xuehaozhe");
        
        //对象关联 先创建对象 再使用
        Computer c = new Computer();
        c.setBrand("MAC");
        c.setPrice(10000);
        
        t.setComputer(c);
        
        //System.out.println(t.getInfo());
        //xuehaozhe been.Computer@41aff40f
        
        System.out.println(t.getInfo());
    }

}