在二维数组、行还是列中，哪个排在最前面? [英] Which comes first in a 2D array, rows or columns?

问题描述

创建二维数组时，如何记住是先指定行还是列?

When creating a 2D array, how does one remember whether rows or columns are specified first?

推荐答案

Java 指定的数组类似于行专业"的数组.配置，这意味着它首先索引行.这是因为二维数组是数组的数组".

Java specifies arrays similar to that of a "row major" configuration, meaning that it indexes rows first. This is because a 2D array is an "array of arrays".

例如:

int[ ][ ] a = new int[2][4];  // Two rows and four columns.

a[0][0] a[0][1] a[0][2] a[0][3]

a[1][0] a[1][1] a[1][2] a[1][3]

它也可以更像这样:

a[0] ->  [0] [1] [2] [3]
a[1] ->  [0] [1] [2] [3]

第二幅图显示了数组数组".方面.第一个数组包含{a[0] 和a[1]}，每个数组包含四个元素，{[0][1][2][3]}.

The second illustration shows the "array of arrays" aspect. The first array contains {a[0] and a[1]}, and each of those is an array containing four elements, {[0][1][2][3]}.

TL;DR 摘要:

Array[number of arrays][how many elements in each of those arrays]

更多解释，另见数组- 二维.

For more explanations, see also Arrays - 2-dimensional.

这篇关于在二维数组、行还是列中，哪个排在最前面?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！