Exam Jan-2016 - 12. Generate Rectangles + Visualisation

import java.util.Scanner;

public class Main
{
    public static void main(String[] args)
    {
        Scanner console = new Scanner(System.in);

        int n = Integer.parseInt(console.nextLine());
        int m = Integer.parseInt(console.nextLine());

        int count = 0;

        for (int x1 = -n; x1 < n; x1++)
        {
            for (int y1 = -n; y1 < n; y1++)
            {
                for (int x2 = x1 + 1; x2 <= n; x2++)
                {
                    for (int y2 = y1 + 1; y2 <= n; y2++)
                    {
                        int a = Math.abs(x2 - x1);
                        int b = Math.abs(y2 - y1);

                        if (a * b >= m) {
                            System.out.printf("(%d, %d) (%d, %d) -> %d%n", x1, y1, x2, y2, (a * b));
                            count++;
                            // Drawing the rectangles on the coordinate system
                            drawRectangle(x1, y1, x2, y2, n);
                        }
                    }
                }
            }
        }
        if (count == 0) System.out.println("No");
    }

    public static void drawRectangle(int x1, int y1, int x2, int y2, int gridSize)
    {
        int size = gridSize + 3;

        System.out.print("\n ");

        for (int col = -size; col <= size; col++)
        {
            System.out.printf(" %2d", col);
        }
        System.out.println();

        for (int row = -size; row <= size; row++)
        {
            System.out.printf("%2d", row);
            for (int col = -size; col <= size; col++)
            {
                System.out.print(((col == x1 || col == x2) &&
                                  (row == y1 || row == y2)) ? " * " : " | ");
            }
            System.out.println();
        }
        System.out.println();
    }
}