TestPair

package exams.july2017;

import javafx.util.Pair;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.Map;

public class P04_PokemonEvolution {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        String input = "";

        Map<String, ArrayList<Pair<String, Integer>>> map = new LinkedHashMap<>();
        String oneName = "";
        String pokemon = "";
        while (true) {
            input = reader.readLine();
            if (input.equals("wubbalubbadubdub")) break;

            String[] tokens = input.split(" -> ");
            if (tokens.length == 1) {
                oneName = tokens[0];
            } else {

                pokemon = tokens[0];
                String evoType = tokens[1];
                int evoIndex = Integer.parseInt(tokens[2]);

                if (!map.containsKey(pokemon)) {
                    map.put(pokemon, new ArrayList<>());
                    map.get(pokemon).add(new Pair<>(evoType, evoIndex));
                } else {
                    map.get(pokemon).add(new Pair<>(evoType, evoIndex));
                }
            }

            if (map.containsKey(oneName)) {
                System.out.println("# " + oneName);
                map.get(oneName)
                        .forEach((value) -> {
                            System.out.printf("%s <-> %d%n", value.getKey(), value.getValue());
                        });
            }
        }

        map.forEach((key, value) -> {
            System.out.printf("# %s%n", key);
            value.stream()
                    .sorted((x1, x2) -> Integer.compare(x2.getValue(), x1.getValue()))
                    .forEach(ordered -> {
                        System.out.printf("%s <-> %d%n", ordered.getKey(), ordered.getValue());
                    });
        });
    }
}