Coursework

src/ru/skypro/Employee.java

@@ -0,0 +1,82 @@
+package ru.skypro;
+
+// Ентити
+//@Getter
+public class Employee {
+    private static int counter;
+    private final Integer id;
+    private final String firstName;
+    private final String lastName;
+    private final String secondName;
+    //@Setter
+    private String department;//1-5
+    //@Setter
+    private Integer salary;
+
+    public Employee(final String firstName, final String lastName, final String secondName, final String department, final Integer salary) {
+        this.id = counter++;
+        this.firstName = firstName;
+        this.lastName = lastName;
+        this.secondName = secondName;
+        this.department = department;
+        this.salary = salary;
+    }
+
+    // Alt+Insert generated && modified to JSON output
+    @Override
+    public String toString() {
+        return "{" +
+                "\"ИД\":" + id +
+                ", \"Фамилия\":\"" + lastName + '\"' +
+                ", \"Имя\":\"" + firstName + '\"' +
+                ", \"Отчество\":\"" + secondName + '\"' +
+                ", \"Отдел\":\"" + department + '\"' +
+                ", \"Зарплата\":" + salary +
+                "}";
+    }
+
+    public String toStringOnlyFIO() {
+        return "{" +
+                "\"Фамилия\":\"" + lastName + '\"' +
+                ", \"Имя\":\"" + firstName + '\"' +
+                ", \"Отчество\":\"" + secondName + "\"" +
+                "}";
+    }
+
+    public String toStringWithoutDepartment() {
+        return "{" +
+                "\"Фамилия\":\"" + lastName + '\"' +
+                ", \"Имя\":\"" + firstName + '\"' +
+                ", \"Отчество\":\"" + secondName + "\"" +
+                ", \"Зарплата\":" + salary +
+                "}";
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public String getSecondName() {
+        return secondName;
+    }
+
+    public String getDepartment() {
+        return department;
+    }
+
+    public void setDepartment(String department) {
+        this.department = department;
+    }
+
+    public Integer getSalary() {
+        return salary;
+    }
+
+    public void setSalary(Integer salary) {
+        this.salary = salary;
+    }
+}

src/ru/skypro/EmployeeBook.java

@@ -0,0 +1,158 @@
+package ru.skypro;
+
+import java.util.Arrays;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+// Аналог репозитория похоже
+public class EmployeeBook {
+
+    private final Employee[] eployies = new Employee[10];
+
+    public EmployeeBook() {
+
+    }
+
+    public void init() {
+        for (int i = 0; i < 10; i++) {
+            eployies[i] = new Employee(
+                    "И." + i, "Ф." + i, "О." + i,
+                    String.valueOf(1 + i / 2),
+                    100000 + (int) (Math.random() * 100000));
+        }
+    }
+
+    public String getAllEmployies() {
+        return "[" + Arrays.stream(eployies)
+                .map(Employee::toString)
+                .collect(Collectors.joining(",\n")) + "]";
+    }
+
+    public Integer getSumSalaries() {
+        return Arrays.stream(eployies)
+                .mapToInt(Employee::getSalary)
+                .sum();
+    }
+
+    public Employee getEmployeeWithMinSalary() {
+        return Arrays.stream(eployies)
+                .reduce((e1, e2) -> e1.getSalary() < e2.getSalary() ? e1 : e2).orElseThrow();
+    }
+
+    public Employee getEmployeeWithMaxSalary() {
+        return Arrays.stream(eployies)
+                .reduce((e1, e2) -> e1.getSalary() > e2.getSalary() ? e1 : e2).orElseThrow();
+    }
+
+    public Double getAvgSalaries() {
+        return (double) getSumSalaries() / eployies.length;
+    }
+
+    public String listNamesOfAllEmployies() {
+        return "[" + Arrays.stream(eployies)
+                .map(Employee::toStringOnlyFIO)
+                .collect(Collectors.joining(",\n")) + "]";
+    }
+
+    public void salaryIndex(Integer percent) {
+        Arrays.stream(eployies)
+                .forEach((e) -> e.setSalary(e.getSalary() + e.getSalary() * percent / 100));
+    }
+
+    public Employee getEmployeeWithMinSalaryInDepartment(String department) {
+        return Arrays.stream(eployies)
+                .filter(e -> Objects.equals(e.getDepartment(), department))
+                .reduce((e1, e2) -> e1.getSalary() < e2.getSalary() ? e1 : e2).orElseThrow();
+    }
+
+    public Employee getEmployeeWithMaxSalaryInDepartment(String department) {
+        return Arrays.stream(eployies)
+                .filter(e -> Objects.equals(e.getDepartment(), department))
+                .reduce((e1, e2) -> e1.getSalary() > e2.getSalary() ? e1 : e2).orElseThrow();
+    }
+
+    public Integer getSumSalariesInDepartment(String department) {
+        return Arrays.stream(eployies)
+                .filter(e -> Objects.equals(e.getDepartment(), department))
+                .mapToInt(Employee::getSalary).sum();
+    }
+
+    public Double getAvgSalariesInDepartment(String department) {
+        return (double) getSumSalariesInDepartment(department) /
+                Arrays.stream(eployies)
+                        .filter(e -> Objects.equals(e.getDepartment(), department))
+                        .count();
+    }
+
+    public void salaryIndexInDepartment(String department, Integer percent) {
+        Arrays.stream(eployies)
+                .filter(e -> Objects.equals(e.getDepartment(), department))
+                .forEach((e) -> e.setSalary(e.getSalary() + e.getSalary() * percent / 100));
+    }
+
+    public String listNamesOfEmployiesInDepartment(String department) {
+        return "[" + Arrays.stream(eployies)
+                .filter(e -> Objects.equals(e.getDepartment(), department))
+                .map(Employee::toStringWithoutDepartment)
+                .collect(Collectors.joining(",\n")) + "]";
+    }
+
+    public Employee[] listEmployiesWithSalaryMoreThanOrEqual(Integer value) {
+        var list = Arrays.stream(eployies)
+                .filter(e -> e.getSalary() >= value).toList();
+        return list.toArray(new Employee[0]);
+    }
+
+    public Employee[] listEmployiesWithSalaryLessThan(Integer value) {
+        var list = Arrays.stream(eployies)
+                .filter(e -> e.getSalary() < value).toList();
+        return list.toArray(new Employee[0]);
+    }
+
+    public String specialOutputForListEmployiesMethods(Employee[] eployies) {
+        return "[" + Arrays.stream(eployies)
+                .map(Employee::toStringWithoutDepartment)
+                .collect(Collectors.joining(",\n")) + "]";
+    }
+
+    public void addNewEmplyeeInMem(String firstName, String lastName, String secondName, String department, Integer salary) {
+        for (var i = 0; i < 10; i++) {
+            if (eployies[i] == null) {
+                eployies[i] = new Employee(firstName, lastName, secondName, department, salary);
+                return;
+            }
+        }
+        throw new RuntimeException("Все ячейки массива заняты");
+    }
+
+    public void delEmployeeById(Integer id) {
+        eployies[id] = null;
+    }
+
+    public void delEmployeeByFIO(String firstName, String lastName, String secondName) {
+        for (var i = 0; i < 10; i++) {
+            if (eployies[i] != null &&
+                    Objects.equals(eployies[i].getFirstName(), firstName) &&
+                    Objects.equals(eployies[i].getLastName(), lastName) &&
+                    Objects.equals(eployies[i].getSecondName(), secondName)
+            )
+                eployies[i] = null;
+        }
+    }
+
+    public void setEmployeeSalaryAndDepartment(String firstName, String lastName, String secondName, String department, Integer salary) {
+        for (var i = 0; i < 10; i++) {
+            if (eployies[i] != null &&
+                    Objects.equals(eployies[i].getFirstName(), firstName) &&
+                    Objects.equals(eployies[i].getLastName(), lastName) &&
+                    Objects.equals(eployies[i].getSecondName(), secondName)
+            ) {
+                if (salary != null)
+                    eployies[i].setSalary(salary);
+                if (department != null)
+                    eployies[i].setDepartment(department);
+            }
+        }
+    }
+
+}

src/ru/skypro/Main.java

@@ -1,7 +1,42 @@
 package ru.skypro;
 
 public class Main {
-    public static void main(String[] args){
+    private static final EmployeeBook book = new EmployeeBook();
+
+    public static void main(String[] args) {
+        book.init();
+        //Basic difficult
+        System.out.println("Список всех сотрудников со всеми имеющимися по ним данными: " + book.getAllEmployies());
+        System.out.println("Сумма затрат на зарплаты в месяц: " + book.getSumSalaries());
+        System.out.println("Сотрудник с минимальной зарплатой: " + book.getEmployeeWithMinSalary());
+        System.out.println("Сотрудник с максимальной зарплатой: " + book.getEmployeeWithMaxSalary());
+        System.out.println("Среднее значение зарплат: " + book.getAvgSalaries());
+        System.out.println("Ф. И. О. всех сотрудников: " + book.listNamesOfAllEmployies());
+        //Advanced difficult
+        book.salaryIndex(10);
+        System.out.println("TestCase: " + book.getAllEmployies());
+        String randomDepartment = String.valueOf(1 + (int) (Math.random() * 5));
+        System.out.println("Сотрудник с минимальной зарплатой в отделе " + randomDepartment + ": " + book.getEmployeeWithMinSalaryInDepartment(randomDepartment));
+        System.out.println("Сотрудник с максимальной зарплатой в отделе " + randomDepartment + ": " + book.getEmployeeWithMaxSalaryInDepartment(randomDepartment));
+        System.out.println("Сумму затрат на зарплату по отделу " + randomDepartment + ": " + book.getSumSalariesInDepartment(randomDepartment));
+        System.out.println("Средняя зарплата по отделу " + randomDepartment + ": " + book.getAvgSalariesInDepartment(randomDepartment));
+        book.salaryIndexInDepartment(randomDepartment, 10);
+        System.out.println("Ф. И. О. сотрудников отдела " + randomDepartment + ": " + book.listNamesOfEmployiesInDepartment(randomDepartment));
+        Integer someValue = 150000;
+        System.out.println("Сотрудники с зарплатой меньше числа " + someValue + ":");
+        System.out.println(book.specialOutputForListEmployiesMethods(book.listEmployiesWithSalaryLessThan(someValue)));
+        System.out.println("Сотрудники с зарплатой больше числа " + someValue + ":");
+        System.out.println(book.specialOutputForListEmployiesMethods(book.listEmployiesWithSalaryMoreThanOrEqual(someValue)));
+        //Very difficult
+        book.delEmployeeById(1);
+        book.delEmployeeByFIO("И.4", "Ф.4", "О.4");
+        book.addNewEmplyeeInMem("asdf", "fdsa", "sasd", "3", 120000);
+        book.addNewEmplyeeInMem("QQasdf", "QWfdsa", "WWasd", "1", 60000);
+        book.setEmployeeSalaryAndDepartment("И.6", "Ф.6", "О.6", "1", 300000);
+        book.setEmployeeSalaryAndDepartment("И.7", "Ф.7", "О.7", null, 250000);
+        System.out.println("TestCase: ");
+        System.out.println(book.getAllEmployies());
 
     }
+
 }