Java – returns the number of rows in a 2D array?

I have this 2D array:

private boolean[][] landscape;

This landscape array defines a pond with [rows] and [cols]

The public int getrows() method needs to return the number of rows in the pattern array

I tried to go back to landscape length; That doesn't work Combined with more things I tried, I didn't succeed:

int count = 0;
        for (boolean[] i : landscape){
            count += i.length;


        }
        return count;

and

int count = 0;

        for (int i = 0; i < landscape.length; i++) {

                if (landscape[i] != null){
                    count ++;

            }

        }
        return count;

The number of rows and columns depends on what the user selects At least 5 So what should I do?

Solution

Let's start with some definitions:

We assume that the 3 x 4 rectangular array has 3 columns and 4 rows, which is expressed by the following formula:

boolean landscape[][] = new boolean[3][4];

To get the number of rows and columns:

int nosRows = landscape[0].length;  // 4
int nosCols = landscape.length;     // 3

If you think I've mixed rows and columns, rename them (mentally) (there is no general convention on which dimension represents columns and rows.)

If you expect answers other than 3 or 4, you need to explain what you're talking about

Obviously, this applies only to square and rectangular arrays