如何增加数组的长度 [英] How to increase an array's length

问题描述

我有一个简单的问题.我在 java 中有一个整数数组，它需要它的长度在整个类中变化.具体来说，我需要在某些情况下加一.我是这样试的.

I have a quick question. I have an integer array in java that needs its length to vary throughout the class. Specifically, I need it to increase by one in certain situations. I tried it like this.

        sbgHeadX = new int[ numberOfSBG ];

我会在需要时增加整数变量 numberOfSBG，但我认为这行不通.还有其他办法吗?

I would increase the integer variable numberOfSBG when I needed to, but I don't think this works. Is there any other way?

推荐答案

我建议你使用 ArrayList 因为您不必再​​担心长度了.一旦创建，就不能修改数组大小:

I would suggest you use an ArrayList as you won't have to worry about the length anymore. Once created, you can't modify an array size:

数组是一个容器对象，它包含固定数量的单一类型的值.数组的长度是在创建数组时确定的.创建后，其长度是固定的.

An array is a container object that holds a fixed number of values of a single type. The length of an array is established when the array is created. After creation, its length is fixed.

(来源)

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