aoc/day02.java

// so how do we parse this file?
// .split("regex here...")

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class day02 {
	public static void main(String[] args) throws IOException {
		int posHorizontal = 0;
		int posDepth = 0;
		int finalAns = 0; // posHorizontal * posDepth

		String line;

		String direction;
		int movement;

		BufferedReader in = new BufferedReader(new FileReader("day02-input.txt"));
		line = in.readLine();
		while (line != null) {

			String[] lineProcess = line.split(" ");
			
			direction = lineProcess[0];
			movement = Integer.valueOf(lineProcess[1]).intValue();

			if (direction.compareTo("forward") == 0) {
				posHorizontal += movement;

			}
			else if (direction.compareTo("up") == 0) {
				posDepth -= movement;
			}
			else if (direction.compareTo("down") == 0) {
				posDepth += movement;
			}

			line = in.readLine();
		}

		in.close();

		finalAns = posHorizontal * posDepth;
		System.out.println(finalAns);
	}

}