问题描述
声明多维数组并为其赋值的正确方法是什么？
What is the correct way to declare a multidimensional array and assign values to it?
这就是我所拥有的：
int x = 5;
int y = 5;
String[][] myStringArray = new String [x][y];
myStringArray[0][x] = "a string";
myStringArray[0][y] = "another string";
推荐答案
尝试用以下代码替换相应的行：
Try replacing the appropriate lines with:
myStringArray[0][x-1] = "a string";
myStringArray[0][y-1] = "another string";
您的代码不正确，因为子数组的长度为 y ，索引从0开始。因此设置为 myStringArray [0] [y] 或 myStringArray [0] [x] 将失败，因为索引 x 和 y 超出界限。
Your code is incorrect because the sub-arrays have a length of y, and indexing starts at 0. So setting to myStringArray[0][y] or myStringArray[0][x] will fail because the indices x and y are out of bounds.
String [] [] myStringArray = new String [x] [y]; 是初始化矩形多维数组的正确方法。如果你希望它是锯齿状的（每个子数组可能有不同的长度），那么你可以使用类似于。但请注意，在您需要完全矩形的多维数组的情况下，John必须手动创建子数组的断言是不正确的。
String[][] myStringArray = new String [x][y]; is the correct way to initialise a rectangular multidimensional array. If you want it to be jagged (each sub-array potentially has a different length) then you can use code similar to this answer. Note however that John's assertion that you have to create the sub-arrays manually is incorrect in the case where you want a perfectly rectangular multidimensional array.
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