如何在 Java 中访问对象的父对象? [英] How to access an object's parent object in Java?

问题描述

看看这个例子:

class Parent{
    Child child = new Child();
    Random r = new Random();
}

class Child{

    public Child(){
        //access a method from Random r from here without creating a new Random()
    }
}

如何从 Child 对象中访问 Random 对象?

How can I access the Random object from within the Child object?

推荐答案

让 Parent 类将自己的 Random 实例传递给 Child> 班级.

Have the Parent class pass its own instance of Random to the Child class.

class Parent{
    Child child;
    Random r = new Random();

    public Parent()
    {
        child = new Child(r);
    }
}

class Child{    
    public Child(Random r){

    }    
}

经典的奥卡姆剃刀.

这篇关于如何在 Java 中访问对象的父对象?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！