如何在Java中增加数组的大小? [英] How to increase the size of an array in Java?

问题描述

我想将用户所需的元素存储在一个数组中.但是我该怎么做.

I want to store as many elements as desired by the user in an array. But how do I do it.

如果我要创建一个数组，我必须使用固定的大小.每次将新元素添加到数组并且数组变满时，我都想将其大小更新为1".

If I were to create an array, I must do so with a fixed size. Every time a new element is added to the array and the array becomes full, I want to update its size by '1'.

我厌倦了各种类型的代码，但没有奏效.

I tired various types of code, but it did not work out.

如果有人能给我一个解决方案 - 如果可能的话，在代码中会很有帮助.

It would be of great help if someone could give me a solution regarding it - in code if possible.

推荐答案

不要使用数组，而是使用 java.util.List 的实现，例如 ArrayList.ArrayList 有一个数组后端，它保存列表中的值，但数组大小由列表自动处理.

Instead of using an array, use an implementation of java.util.List such as ArrayList. An ArrayList has an array backend which holds values in a list, but the array size is automatically handles by the list.

ArrayList<String> list = new ArrayList<String>();
list.add("some string");

对于其他元素类型，您还可以使用 list.toArray(new String[list.size()]) 等将列表转换为数组.

You can also convert the list into an array using list.toArray(new String[list.size()]) and so forth for other element types.

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