advent of code day 4 2022

AdventDay4.java

package org.example;

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

public class AdventDay4 {
    public static boolean checkAssignmentPair(String str) {
        String pair[] = str.split(",");

        String first[] = pair[0].split("-"), second[] = pair[1].split("-");
        int aa = Integer.parseInt(first[0]), ab = Integer.parseInt(first[1]);
        int ba = Integer.parseInt(second[0]), bb = Integer.parseInt(second[1]);

        return (aa <= ba && ab >= bb) || (ba <= aa && bb >= ab);
    }

    public static void main(String[] args) throws FileNotFoundException {
        Scanner scan = new Scanner(new File("day4.txt"));
        int sum = 0;
        try {
            while (true) {
                if (checkAssignmentPair(scan.nextLine()))
                    sum++;
            }
        }
        catch (Exception ignored) {
            // eof
        }

        System.out.println(sum);
    }
}