Magic squares Assignment in java ~ foundjava

Mercury.txt

8 58 59 5 4 62 63 1

49 15 14 52 53 11 10 56

41 23 22 44 45 19 18 48

32 34 35 29 28 38 39 25

40 26 27 37 36 30 31 33

17 47 46 20 21 43 42 24

9 55 54 12 13 51 50 16

64 2 3 61 60 6 7 57

Luna.txt

37 78 29 70 21 62 13 54 5

6 38 79 30 71 22 63 14 46

47 7 39 80 31 72 23 55 15

16 48 8 40 81 32 64 24 56

57 17 49 9 41 73 33 65 25

26 58 18 50 1 42 74 34 66

67 27 59 10 51 2 43 75 35

36 68 19 60 11 52 3 44 76

77 28 69 20 61 12 53 4 45

Solutions

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class MagicSquares {
    public static boolean testMagic(String pathName) throws IOException {
        // Open the file
        BufferedReader reader = new BufferedReader(new FileReader(pathName));

        boolean isMagic = true;
        int lastSum = -1;
        
        // For each line in the file ...
        String line;
        while ((line = reader.readLine()) != null) {
            // ... sum each row of numbers
            String[] parts = line.split("\t");
            int sum = 0;
            for (String part : parts) {
                sum += Integer.parseInt(part);
            }

            if (lastSum == -1) {
                // If this is the first row, remember the sum
                lastSum = sum;
            } else if (lastSum != sum) {
                // if the sums don't match, it isn't magic, so stop reading
                isMagic = false;
                break;
            }
        }
        
        reader.close();
        return isMagic;
    }

    public static void main(String[] args) throws IOException {
        String[] fileNames = { "Mercury.txt", "Luna.txt" };
        for (String fileName : fileNames) {
            System.out.println(fileName + " is magic? " + testMagic(fileName));
        }
    }
}