company rooster

package definingClassesHomework.pr04CompanyRoster;

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

class Employee implements Comparable<Employee> {

    static final String DEFAULT_EMAIL = "n/a";
    static final int DEFAULT_AGE = -1;

    String name;
    double salary;
    String position;
    String department;
    String email;
    int age;

    public Employee(String name, double salary, String position,
            String department, String email, int age) {
        this.name = name;
        this.salary = salary;
        this.position = position;
        this.department = department;
        this.email = email;
        this.age = age;
    }

    public Employee(String name, double salary, String position,
            String department, String email) {
        this(name, salary, position, department, email, DEFAULT_AGE);
    }

    public Employee(String name, double salary, String position,
            String department, int age) {
        this(name, salary, position, department, DEFAULT_EMAIL, age);
    }

    public Employee(String name, double salary, String position,
            String department) {
        this(name, salary, position, department, DEFAULT_EMAIL, DEFAULT_AGE);
    }

    @Override
    public int compareTo(Employee other) {
        return Integer.compare(this.age, other.age);
    }

}

public class Pr04CompanyRoster {

    public static void main(String[] args) {

        try (BufferedReader reader = new BufferedReader(new InputStreamReader(
                System.in));) {
            Map<String, List<Employee>> listOfEmployees = new LinkedHashMap<>();
            int lines = Integer.parseInt(reader.readLine());
            for (int i = 0; i < lines; i++) {
                String[] inputLine = reader.readLine().split(" ");
                String name = inputLine[0];
                double salary = Double.parseDouble(inputLine[1]);
                String position = inputLine[2];
                String department = inputLine[3];
                Employee employee = null;
                if (inputLine.length == 5) {
                    String email = inputLine[4];
                    int isEmail = email.indexOf('@');
                    if (isEmail == -1) {
                        int age = Integer.parseInt(email);
                        employee = new Employee(name, salary, position,
                                department, age);
                    } else {
                        employee = new Employee(name, salary, position,
                                department, email);
                    }
                } else if (inputLine.length == 6) {
                    String email = inputLine[4];
                    int age = Integer.parseInt(inputLine[5]);
                    employee = new Employee(name, salary, position, department,
                            email, age);
                } else {
                    employee = new Employee(name, salary, position, department);
                }
                if (!listOfEmployees.containsKey(department)) {
                    listOfEmployees.put(department, new ArrayList<>());
                }
                listOfEmployees.get(department).add(employee);
            }
            listOfEmployees
                    .entrySet()
                    .stream()
                    .sorted((d1, d2) -> Double.compare(
                            d2.getValue().stream().mapToDouble(x -> x.salary)
                                    .average().getAsDouble(), d1.getValue()
                                    .stream().mapToDouble(x -> x.salary)
                                    .average().getAsDouble()))
                    .limit(1)
                    .forEach(
                            dep -> {
                                System.out
                                        .println("Highest Average Salary: "
                                                + dep.getKey());
                                List<Employee> printList = new ArrayList<>(dep
                                        .getValue());
                                printList.sort((d1, d2) -> Double.compare(
                                        d2.salary, d1.salary));
                                for (Employee empl : printList) {
                                    System.out.printf("%s %.2f %s %d\n",
                                            empl.name, empl.salary, empl.email,
                                            empl.age);
                                }
                            });

        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}