Natour, O. 10/3/16 Csc-220 starData

/*
 * Omar Natour
 * 10/3/2016
 * Csc-220 Data Structures
 * Hw3 Two Dimensional Arrays
 * Check values of surround numbers of a particular number within a 2d array.
 * [email protected]
 */

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class StarAnalysis {

    static int rows = 0;
    static int columns = 0;

    public static void main(String[] args) {

        Scanner sc = null;
        try {
            sc = new Scanner(new File("starData.txt"));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        do {
            outputStarData(analyzeStarData(readStarsData(sc)));
        } while (doThisAgain(sc));

        sc.close();
    }

    private static boolean doThisAgain(Scanner sc) {
        String doOver = sc.next();
        if (doOver.equalsIgnoreCase("Y")) {
            return true;
        } else {
            return false;
        }
    }

    public static int[][] readStarsData(Scanner s) {

        if (s.hasNextInt())
            rows = s.nextInt();
        else
            System.err.print("Bad Row length input");
        if (s.hasNextInt())
            columns = s.nextInt();
        else
            System.err.print("Bad Column Length input.");

        int[][] starData = new int[rows][columns];

        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < columns; j++) {
                starData[i][j] = s.nextInt();
            }
        }
        return starData;
    }

    public static char[][] analyzeStarData(int starData[][]) {

        int current;
        char[][] stars = new char[rows][columns];

        for (int i = 1; i < rows - 1; i++) {
            for (int j = 1; j < columns - 1; j++) {
                current = 0;
                for (int k = i - 1; k <= i + 1; k++) {
                    for (int m = j - 1; m <= j + 1; m++) {
                        current += starData[k][m];

                        if (current / 5.0 > 6.0) {
                            stars[i][j] = '*';
                        } else
                            stars[i][j] = ' ';
                    }
                }
            }
        }
        return stars;
    }

    public static void outputStarData(char pattern[][]) {
        String output = "";

        for (int i = 1; i < columns - 1; i++) {
            output += ("+---");
        }
        output += "+";
        output += ('\n');

        for (int i = 1; i < rows - 1; i++) {
            for (int j = 1; j < columns - 1; j++) {
                output += ("| " + pattern[i][j] + " ");
            }

            output += "|";
            output += ("\n");

            for (int k = 1; k < columns - 1; k++) {
                output += ("+---");
            }

            output += "+";
            output += ("\n");
        }
        System.out.println(output);
    }
}