Advent of Code 2017 Day 2

Day2.java

package Advent2017;

import util.ArrayUtils;
import util.FileIO;

import java.util.Arrays;


public class Day2 {

    public static int part1(String s) {
        Integer[] a = FileIO.StringArrayToInteger(s.split("\\s+"));
        return ArrayUtils.max(a) - ArrayUtils.min(a);
    }

    public static int part2(String s) {
        Integer[]a = FileIO.StringArrayToInteger(s.split("\\s+"));
        Arrays.sort(a);
        for (int i = a.length - 1; i >= 0 ; i--) {
            for (int j = i - 1; j >=0 ; j--) {
                if (a[i] % a[j] == 0) {
                    return a[i] / a[j];
                }
            }
        }
        return 0;
    }

    public static void main(String[] args) {
        //List<String> input = FileIO.getAOCInputForDay(2017, 2, FileIO.SESSION_ID);
        String filename = "advent2017_day2.txt";
        int sum1 = FileIO.performIntActionOnLine(filename, Day2::part1);
        int sum2 = FileIO.performIntActionOnLine(filename, Day2::part2);
        System.out.println("Part 1: " + sum1);
        System.out.println("Part 2: " + sum2);

    }
}