blocks|key|4085554|text|如果在添加另一个元素时需要增加数组的大小，则必须构造另一个大小为旧数组%2B1的数组。然后，将旧数组的内容复制到新数组(较大的数组)中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4085555|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you need to increase the size of the array when adding another element, you have to construct another array with the size of the old array +1.
Afterwards, you would copy the contents of the old array over to the new array (the bigger array).

blocks|key|255777|text|如果你能接受一个固定大小的数组，这至少会给你一点成功的机会。如果不能，你就无法击败ArrayList，如果你的任务是成功而不重新实现它，那么这是一个不可能完成的任务。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|255778|你真的应该更深入地了解像这样重写代码的确切理由，这将给我们一些机会来适当地帮助你。|255779|entityMap^0|15|9|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|N|8|@]|D|@]|E|$]]]|I|$]]

If you can live with a fixed-size array, that gives you at least a slight chance of success. If not, you can't beat <code>ArrayList</code> and if your mission is to succeed without reimplementing it, then it is an impossible mission.

You should really give more insight into the exact rationale for rewriting your code like that, it would give us some chance to properly help you.

blocks|key|5813983|text|我可以推荐：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5813984|只要需要插入元素，就使用Arraylist。一旦数组为最终数组，就转换为数组。|5813985|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I can recommend: 
Use Arraylist as Long you Need to insert Elements. Once th Array is final Convert to Array.

blocks|key|4085625|text|我认为你最好在这里使用arrayList，但只是为了让你对它有更多的了解。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4085626|要做你想做的事情，你必须保留一个索引整数，它只指向数组中的当前位置，然后当你添加时，你可以递增它，并将新对象添加到下一个位置。当您达到数组的最大大小时，您将需要扩展它。你会发现已经有人问过关于扩展数组的问题了，你可以在这里找到答案：Expanding+an+Array?|offset|length|4085627|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/8438879/expanding-an-array^0|0|38|J|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

I think you are best sticking with an arrayList here, but just to give you a bit more light on it.

To do what you are trying to do, you will have to keep a index integer which will just point to the current position in the array, then when you add you can increment this and add the new object into the next poisition.
When you get to the maximum size of your array, you will need to expand it.
You will find that there has been questions on expanding an array which have been asked already and you can find the answers here:
<a href="https://stackoverflow.com/questions/8438879/expanding-an-array">Expanding an Array?</a>

I am trying to convert a section of code from using an ArrayList of custom objects to a regular array.

Previous my definition was 

<pre><code>ArrayList&lt;Room&gt; rooms = new ArrayList&lt;Room&gt;();
</code></pre>

Which I have now changed to 

<pre><code>Room[] rooms;
</code></pre>

Previously I used the below line to add items to the array list

<pre><code>rooms.add(new Room(1,1,30,false,true,true,false));
</code></pre>

But I am now struggling to find the way I should simply add individual items to the array throughout code.

Arraylist vs Array with custom objects in java

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在尝试将一段代码从使用自定义对象的ArrayList转换为常规数组。之前我的定义是ArrayList<Room> rooms = new ArrayList<Room>();现在我已经改成了Room[] rooms;以前，我使用以下行将项添加到数组列表中rooms.add(new Room(1,1,30,false...

问java中具有自定义对象的Arraylist与Array
EN

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