检查任意大小的 Java 中二维数组的行和列中的元素

Question

I am looking for a way to check the rows and the columns of 2D array of arbitrary size. For example, user wants to print NxN size board. In this case, we can't just check for the positions(rows and cols) as we do in fixed length of 2D array. My first idea was to check each if array[i][j]==array[i][j+1], but this obviously won't work and will crash due to the ArrayOutOfBounds exception, as well as wont check the whole length of rows/cols.

Any ideas/suggestions?

My current flawed idea:

for (int i = 0; i<arr.length-1; i++){
           for (int j = 0; j<arr[i].length-1; j++){
               if (arr[i][j]!=arr[i][j+1]){
                   //do something..
           }
       }

Answer 1

You need to make use of the Array.length property (it's a property, not a method, note,). to determine how wide your array is. More examples etc. here