一、内存分析

代码：引用可以是局部变量也可以是成员变量

[url=][/url]
public class Test1{  public static void main(String[] args){    User u = new User();    u.no = 40;    u.name = "ajflasd ";    u.address = new address();    //name、no都是引用，它们存储的是堆内存中对应实例变量的地址  }}[url=][/url]

二、对象之间建立关系

[url=][/url]
public class D34_husband_and_wife{  public static void main(String[] args){      Husband huangxiaoming = new Husband();    Wife baby = new Wife();    huangxiaoming.name = "huangxiaoming";    baby.name = "baby";    //上面的例子其实将两个人割裂开来，没有建立关系    //下面对她们进行建立关系    huangxiaoming.w = baby;    baby.h = huangxiaoming;  ​  }}class Wife {  String name;  Husband h;}class Husband {  String name;  Wife w;}[url=][/url]

二、源码：

D34_husband_and_wife.java

地址：

https://github.com/ruigege66/Java/blob/master/D34_husband_and_wife.java​

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DKA-2018