如何从一个2D Java数组列？ [英] How to get a column from a 2D java array?

问题描述

我知道，二维数组是数组的数组。为了得到一个排，你可以做：

I know that 2d arrays are arrays of arrays. To get a row you can do:

rowArray = my2Darray[row]

由于各行可以具有不同的尺寸，我假设它没有内置于获得一个二维数组的列。这使我相信，你必须做一些事情，如：

Since each row can be a different size, I'm assuming it's not built in to get a column from a 2D array. It leads me to believe you'd have to do something like:

for(int row = 0; row < numRows; row++)
{
    colArray[row] = m2Darray[row][columnOfInterest];
}

这是正确的？它是唯一的出路？

Is this correct? Is it the only way?

推荐答案

如果您被锁定到使用二维数组，那么是的，这是它AFAIK。然而，一个建议，可以帮助你（如果可能）：

If you are locked down to using a 2d array, then yes, this is it afaik. However, a suggestion that may help you (if possible):

裹在处理列取一个类的数组。

Wrap the array in a class that handles the column fetching.

祝你好运。

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