Maps, Lambda and Stream API - Exercise - Company Users

package com.company;

import java.util.*;


public class Main {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        String input = "";
        Map<String, List<String>> information = new LinkedHashMap<>();

        while (!"End".equals(input = scanner.nextLine())){

            String[] data = input.split("->");
            String companyName = data[0];
            String employeeId = data[1];

            if (!information.containsKey(companyName)){
                information.put(companyName,new ArrayList<>());
                information.get(companyName).add(employeeId);
            }else {
                if (!information.get(companyName).contains(employeeId)){
                    information.get(companyName).add(employeeId);
                }
            }
        }

        information.entrySet()
                .stream()
                .sorted((a,b) -> a.getKey().compareTo(b.getKey()))
                .forEach(e -> {
                    System.out.println(e.getKey().trim());
                    for (int i = 0; i < e.getValue().size(); i++) {
                        System.out.printf("-- %s\n",e.getValue().get(i).trim());

                    }
                });
    }
}