advent of code day 10 java

package top.kret11.day10;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.*;

public class Main {

  private static Map<String, String> pairs = Map.of("(", ")", "{", "}", "[", "]", "<", ">");
  private static Map<String, Integer> part1Points = Map.of(")", 3, "]", 57, "}", 1197, ">", 25137);
  private static Map<String, Integer> part2Points = Map.of(")", 1, "]", 2, "}", 3, ">", 4);

  public static void main(String[] args) throws IOException {
    if (args == null || args.length == 0) {
      throw new RuntimeException("Need to provide file path");
    }
    String filePath = args[0];
    List<String> lines = Files.readAllLines(Path.of(filePath));
    List<Stack<String>> goodLines = new ArrayList<>();
    long part1Points = 0l;
    l:
    for (String line : lines) {
      Stack<String> stack = new Stack<>();
      for (char c : line.toCharArray()) {
        String character = String.valueOf(c);
        if (pairs.keySet().contains(character)) {
          stack.push(character);
        } else {
          String op = stack.pop();
          if (!pairs.get(op).equals(character)) {
            int pts = Main.part1Points.get(character);
            part1Points += pts;
            continue l;
          }
        }
      }
      goodLines.add(stack);
    }
    System.out.println(part1Points);

    List<Long> scores = new ArrayList<>();
    for (Stack<String> stack : goodLines) {
      long part2Pnts = 0;
      while (!stack.empty()) {
        String op = stack.pop();
        String cl = pairs.get(op);
        part2Pnts *= 5;
        part2Pnts += part2Points.get(cl);
      }
      scores.add(part2Pnts);
    }
    Collections.sort(scores);
    System.out.println(scores.get(scores.size() / 2));
  }

}