aoc/day01.java

// In around 20 minutes
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class day01 {
    public static void main(String[] args) throws IOException {
        int hasIncreasedCounter = 0;
        int lineCounter = 1;

        int firstnum = 0;
        int nextnum = 0;

        String line; // convert to int or something

        BufferedReader in = new BufferedReader(new FileReader("day01-input.txt"));

        line = in.readLine();
        while (line != null) {

            if (lineCounter == 1) { // first line, no firstnum, set
                firstnum = Integer.valueOf(line).intValue();
                System.out.println("First entry " + firstnum);
            }
            else { // continue, as usual
                nextnum = Integer.valueOf(line).intValue();

                System.out.println("Comparing " + firstnum + " and " + nextnum);

                if (nextnum > firstnum) {
                    System.out.println("Yes!");
                    hasIncreasedCounter++;
                }
                else {
                    System.out.println("Not bigger");
                }

                firstnum = nextnum; // swap to continue
            }

            lineCounter++;
            // continue
            line = in.readLine();
        }
        in.close(); // bye

        System.out.println("Final is " + hasIncreasedCounter);

    }
}