Concert

package ExamPrepTwo.TewentyFouththJuly;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Scanner;

public class Concert {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        HashMap<String, ArrayList<String>> bandMembers = new HashMap<>();
        HashMap<String, Integer> bandTime = new HashMap<>();

        String commandsPrev = scanner.nextLine();

        while (!commandsPrev.equals("start of concert")){
            String[] commands = commandsPrev.split(";\\s+");
            String commandType = commands[0];
            String bandName = commands[1];
            switch (commandType){
                case "Add":
                    if (!bandMembers.containsKey(bandName)) {
                        bandMembers.put(bandName, new ArrayList<>());
                    }
                    List<String> membersFromBand = bandMembers.get(bandName);
                    String[] members = commands[2].trim().split(", ");
                    for (int i = 0; i < members.length; i++) {
                        if (!membersFromBand.contains(members[i])){
                            membersFromBand.add(members[i]);
                        }
                    }
                    break;
                case "Play":
                    bandTime.putIfAbsent(bandName, 0);
                    int time = Integer.parseInt(commands[2]);
                    bandTime.put(bandName, bandTime.get(bandName) + time);
                    break;
            }

            commandsPrev = scanner.nextLine();
        }
        int totalTime = 0;
        for (Integer time : bandTime.values()) {
            totalTime += time;
        }
        System.out.println("Total time: " + totalTime);

        bandTime.entrySet().stream()
                .sorted((a, b) -> {
                   if (a != b){
                       return Integer.compare(b.getValue(), a.getValue());
                   } else {
                       return a.getKey().compareTo(b.getKey());
                   }
                })
                .forEach(e -> {
                    System.out.println(String.format("%s -> %d", e.getKey(), e.getValue()));
                });

        String lastBandCommand = scanner.nextLine();
        System.out.println(lastBandCommand);
        List<String> allMembers = bandMembers.get(lastBandCommand);
        for (String allMember : allMembers) {
            System.out.println(String.format("=> %s", allMember));
        }
    }
}