Java的：扩展类数组 [英] Java: Extend class as array

问题描述

快速新手提问：我想扩展一个类为一个数组，像这样

Quick novice question: I want to extend a class as an array, like so

public class Map extends Item[][]
{

}

这是可能的，我要对错误的方式？谢谢！

Is this possible, am I going about it the wrong way? Thanks!

推荐答案

数组是奇怪的野兽。在有一些特性，如长度，但他们不是一类，所以像你正试图不能扩展它们。

Arrays are weird beasts. The have some properties, like length but they are not a class, so you can't extend them like you are attempting.

我觉得你最好使用成分，即创建一个包含项目类[] []
然后扩展这个类（如果你需要的话，有一个班可能就足够了）

I think you are better off using composition, i.e. create a class that contains an Item[][] and then extend that class (if you need to, having one class might be enough)

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