MultiDimMultiplicationTable.java

/* Desired Output:

Multiplication Table
       1   2   3   4   5   6   7   8   9
 — — — — — — — — — — — — — — — —— — — — — — — — — — — — —
1 |    1   2   3   4   5   6   7   8   9
2 |    2   4   6   8  10  12  14  16  18
3 |    3   6   9  12  15  18  21  24  27
4 |    4   8  12  16  20  24  28  32  36
5 |    5  10  15  20  25  30  35  40  45
6 |    6  12  18  24  30  36  42  48  54
7 |    7  14  21  28  35  42  49  56  63
8 |    8  16  24  32  40  48  56  64  72
9 |    9  18  27  36  45  54  63  72  81

 */

public class MultiDimMultiplicationTable {

    public static void main(String[] args) {

        int[][] intArray = new int[10][10];

        for (int i = 1; i <= 9; i++) {
            for (int j = 1; j <= 9; j++) {
                intArray[i][j] = i*j;
            }
        }

        System.out.println("Multiplication Table");

        System.out.print("    ");

        for (int j = 1; j <= 9; j++)
            System.out.print("   " + j);

        System.out.println("\n — — — — — — — — — — — — — — — —— — — — — — — — — — — — —");

        for (int i = 1; i <= 9; i++) {
            System.out.print(i + " | ");
            for (int j = 1; j <= 9; j++) {
                System.out.printf("%4d" ,  intArray[i][j]);
            }
            System.out.println();
        }

    }

}


/* Alignment:
printf("%4d\n", 1);
printf("%4d\n", 12);
printf("%4d\n", 123);
printf("%4d\n", 1234);
Will give you:
___1
__12
_123
1234
(with spaces instead of underscores)
 */