package javaapplication6;

public class JavaApplication6 {

    public static void main(String[] args) {
        int[][] tab = {
            {1, 0, 0},
            {0, 1, 0},
            {0, 0, 1}
        };
        boolean Diagonal = true;
        for (int i = 0; i < tab.length; i++) {
            if(tab.length != tab[i].length){
            Diagonal = false;
            }
                for (int j = 0; j < tab[i].length; j++) {
                    System.out.print(tab[i][j] + " ");
                    if (j != i && tab[i][j] != 0) {
                        Diagonal = false;
                    }
                }
                System.out.println("");
            }
            if (Diagonal) {
                System.out.println("okay");
            } else {
                System.out.println("not okay :( ");
            }
        }
    }