Java，数组的复制大小

Question

I just took up Java and was wondering. Let's say I have an array (in my case multidimensional) and I wanted to make a copy of it but using a different variable, eg I have a boolean array

boolean[][] arrBool = [2][3]

and I wanted to create an int array of the same dimensions

int[][] arrInt= [2][3]

array. What would the simplest way to do this be?

Thanks

Answer 1

使用length ，它返回数组的长度

int[][] arrInt = new int[arrBool.length][arrBool[0].length]

Answer 2

Just as you'd think you would

boolean[][] arrBool = new boolean[2][3];
int[][] arrInt = new int[2][3];

But I guess you probably mean what if the dimensions are dynamic. Then you could do

boolean[][] arrBool = ...;
int[][] arrInt = new int[arrBool.length][arrBool[0].length];