Two_X_Diagonals

for (int i = 1; i <= n; i++){
    for (int j = 1; j <= n; j++){
        if ( i == j || i + j == n + 1){
           System.out.print("X");
        } else {
            System.out.print("o");
        }
    }
    System.out.println();
}

    }
}