什么ArrayList的实际存储 - 引用对象或实际的对象？ [英] What does ArrayList actually stores - References to objects or actual objects?

问题描述

假如我的code是这样的：

Suppose my code goes like this:

ArrayList list = new ArrayList();
Student s = new Student();    // creating object of Student class

myList.add(s);      // Here am confused ...

/* myList contains just the reference variable to the Student object, OR

   myList contains the actual Student object (memory allocation for name, rollNo etc)  ??   
*/

在短片添加对象使用添加到ArrayList的（）时：

In Short when adding objects to ArrayList using add():

ArrayList是的参考对象列表或它的一个实际的对象???

ArrayList is a list of "References to objects" or its a list of "actual objects" ???

推荐答案

在Java中，你永远不会绕过实际的对象。你总是处理的引用，它本质上只是一个地址到您的对象被存储在存储器内的一个位置。

In Java, you never pass around actual objects. You are always dealing with references, which is essentially just an address to a location within memory where your object is stored.

因为你从来没有与实际工作的对象，包含的ArrayList存储在别处对象的引用数组（在内存中有个地方叫堆）。

Since you never work with actual objects, ArrayLists contains arrays of references to objects stored somewhere else (a place in memory called the heap).

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