Create Lab6

Lab5

@@ -0,0 +1,184 @@
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
+class Letter {
+    private char value;
+
+    public Letter(char value) {
+        this.value = value;
+    }
+
+    public char getValue() {
+        return value;
+    }
+}
+
+class Word {
+    private List<Letter> letters = new ArrayList<>();
+
+    public Word(String input) {
+        for (char c : input.toCharArray()) {
+            letters.add(new Letter(c));
+        }
+    }
+
+    public List<Letter> getLetters() {
+        return letters;
+    }
+
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        for (Letter letter : letters) {
+            sb.append(letter.getValue());
+        }
+        return sb.toString();
+    }
+}
+
+class PunctuationMark {
+    private char value;
+
+    public PunctuationMark(char value) {
+        this.value = value;
+    }
+
+    public char getValue() {
+        return value;
+    }
+}
+
+class Sentence {
+    private List<Object> elements = new ArrayList<>();
+
+    public Sentence(String input) {
+        StringBuilder sb = new StringBuilder();
+        for (char c : input.toCharArray()) {
+            if (Character.isLetterOrDigit(c)) {
+                sb.append(c);
+            } else {
+                if (sb.length() > 0) {
+                    elements.add(new Word(sb.toString()));
+                    sb.setLength(0);
+                }
+                elements.add(new PunctuationMark(c));
+            }
+        }
+        if (sb.length() > 0) {
+            elements.add(new Word(sb.toString()));
+        }
+    }
+
+    public List<Object> getElements() {
+        return elements;
+    }
+
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        for (Object element : elements) {
+            if (element instanceof Word) {
+                sb.append(((Word) element).toString());
+            } else {
+                sb.append(((PunctuationMark) element).getValue());
+            }
+        }
+        return sb.toString();
+    }
+}
+
+class Text {
+    private List<Sentence> sentences = new ArrayList<>();
+
+    public Text(String input) {
+        StringBuilder sb = new StringBuilder();
+        for (char c : input.toCharArray()) {
+            if (c == '.' || c == '?' || c == '!' || c == ',') {
+                sb.append(c);
+                sentences.add(new Sentence(sb.toString()));
+                sb.setLength(0);
+            } else {
+                sb.append(c);
+            }
+        }
+        if (sb.length() > 0) {
+            sentences.add(new Sentence(sb.toString()));
+        }
+    }
+
+    public List<Sentence> getSentences() {
+        return sentences;
+    }
+
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        for (Sentence sentence : sentences) {
+            sb.append(sentence.toString());
+        }
+        return sb.toString();
+    }
+}
+
+public class Lab5 {
+    public static void main(String[] args) {
+        int C17 = 2430 % 17;
+        System.out.println("\n---------------------------------------------------------------------------------------------------------------------");
+        System.out.println("  C17 = " + C17 + ", So, the task is:  delete all previous occurrences of the last letter of each word of the specified text.");
+        System.out.println("---------------------------------------------------------------------------------------------------------------------");
+
+        Scanner scanner = new Scanner(System.in);
+        boolean isDone = false;
+        while (!isDone) {
+            System.out.print("\nEnter a string or type 'q' to quit: ");
+            String input = scanner.nextLine().trim();
+            if (input.equals("q")) {
+                System.out.print("\n The work is completed.");
+                isDone = true;
+            } else if (input.isEmpty()) {
+                System.out.println("Error: Input string is empty. Please enter a non-empty string.");
+            } else {
+                try {
+                    StringBuilder sb = new StringBuilder(input);
+                    String[] words = sb.toString().split("\\s+");
+                    for (int i = 0; i < words.length; i++) {
+                        String word = words[i];
+                        char lastChar = word.charAt(word.length() - 1);
+                        if (!Character.isLetterOrDigit(lastChar)) {
+                            int lastLetterIndex = -1;
+                            for (int j = word.length() - 2; j >= 0; j--) {
+                                if (Character.isLetter(word.charAt(j))) {
+                                    lastLetterIndex = j;
+                                    break;
+                                }
+                            }
+                            if (lastLetterIndex != -1) {
+                                char lastLetter = word.charAt(lastLetterIndex);
+                                String newWord = "";
+                                for (int j = 0; j < word.length() - 1; j++) {
+                                    if (!Character.isLetterOrDigit(word.charAt(j)) || word.charAt(j) != lastLetter) {
+                                        newWord += word.charAt(j);
+                                    }
+                                }
+                                newWord += lastChar;
+                                words[i] = newWord;
+                            }
+                        } else {
+                            char lastLetter = lastChar;
+                            String newWord = "";
+                            for (int j = 0; j < word.length() - 1; j++) {
+                                if (!Character.isLetterOrDigit(word.charAt(j)) || word.charAt(j) != lastLetter) {
+                                    newWord += word.charAt(j);
+                                }
+                            }
+                            newWord += lastLetter;
+                            words[i] = newWord;
+                        }
+                    }
+                    System.out.print("\n Final string: ");
+                    System.out.println(String.join(" ", words));
+                } catch (Exception e) {
+                    System.out.println("An error occurred: " + e.getMessage());
+                }
+            }
+        }
+    }
+}

Lab6

@@ -0,0 +1,225 @@
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+import java.util.Comparator;
+
+class ToyRoom {
+
+    public static void variant() {
+        int C13 = 2430 % 13;
+        System.out.println("\n            ---------------------------------------------------------------------------------------------------------------------");
+        System.out.println("                          C13 = " + C13 + ", So, the task is:  Prepare the toy room for children of different age groups.");
+        System.out.println("            ---------------------------------------------------------------------------------------------------------------------");
+    }
+
+    private List<Toy> toys;
+
+    public ToyRoom() {
+        this.toys = new ArrayList<>();
+    }
+
+    public void addToy(Toy toy) {
+        toys.add(toy);
+    }
+
+    public void displayToys() {
+        System.out.println(" -------------------------------------------------------");
+        System.out.printf(" | %-20s | %-10s | %-15s |\n", "Name", "Price ($)", "Age Group");
+        System.out.println(" |----------------------|------------|-----------------|");
+        for (Toy toy : toys) {
+            System.out.printf(" | %-20s | %-10.2f | %-15s |\n", toy.name, toy.price, toy.ageGroup);
+        }
+        System.out.println(" -------------------------------------------------------");
+    }
+
+    public void sortToys(boolean ascending) {
+        if (ascending) {
+            toys.sort(Comparator.comparingDouble(Toy::getPrice));
+        } else {
+            toys.sort(Comparator.comparingDouble(Toy::getPrice).reversed());
+        }
+    }
+
+    public List<Toy> findToysByPriceRange(double minPrice, double maxPrice) {
+        List<Toy> foundToys = new ArrayList<>();
+        for (Toy toy : toys) {
+            if (toy.getPrice() >= minPrice && toy.getPrice() <= maxPrice) {
+                foundToys.add(toy);
+            }
+        }
+        return foundToys;
+    }
+
+    public void findToysByName(String name) {
+        List<Toy> foundToys = new ArrayList<>();
+        for (Toy toy : toys) {
+            if (toy.name.toLowerCase().contains(name.toLowerCase())) {
+                foundToys.add(toy);
+            }
+        }
+
+        if (!foundToys.isEmpty()) {
+            System.out.println("\n Toys with matching name \"" + name + "\":");
+            System.out.println(" -------------------------------------------------------");
+            System.out.printf(" | %-20s | %-10s | %-15s |\n", "Name", "Price ($)", "Age Group");
+            System.out.println(" |----------------------|------------|-----------------|");
+            for (Toy toy : foundToys) {
+                System.out.printf(" | %-20s | %-10.2f | %-15s |\n", toy.name, toy.price, toy.ageGroup);
+            }
+            System.out.println(" -------------------------------------------------------");
+        } else {
+            System.out.println(" No toys found with a matching name.");
+        }
+    }
+}
+
+
+abstract class Toy {
+    protected String name;
+    protected double price;
+    protected String ageGroup;
+
+    public Toy(String name, double price, String ageGroup) {
+        this.name = name;
+        this.price = price;
+        this.ageGroup = ageGroup;
+
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    @Override
+    public String toString() {
+        return name + " - $" + price + ageGroup;
+    }
+}
+
+class Car extends Toy {
+    public Car(String name, double price, String ageGroup) {
+        super(name, price, ageGroup);
+    }
+}
+
+class Doll extends Toy {
+    public Doll(String name, double price, String ageGroup) {
+        super(name, price, ageGroup);
+    }
+}
+
+class Ball extends Toy {
+    public Ball(String name, double price, String ageGroup) {
+        super(name, price, ageGroup);
+    }
+}
+
+class Cube extends Toy {
+    public Cube(String name, double price, String ageGroup) {
+        super(name, price, ageGroup);
+    }
+}
+
+public class Lab6 {
+    public static void main(String[] args) {
+        ToyRoom toyRoom = new ToyRoom();
+        ToyRoom.variant();
+
+        toyRoom.addToy(new Car("Small car 'Mcqueen'", 10.0, "1-3 years"));
+        toyRoom.addToy(new Car("Small Car 'Audi'", 12.0, "1-3 years"));
+        toyRoom.addToy(new Car("Medium Yellow Car", 15.0, "3-6 years"));
+        toyRoom.addToy(new Car("Medium Blue Car", 18.0, "3-6 years"));
+        toyRoom.addToy(new Car("Car on R/C", 30.0, "6-10 years"));
+        toyRoom.addToy(new Doll("Doll that can talk", 25.0, "1-3 years"));
+        toyRoom.addToy(new Doll("Doll 'Barbie'", 10.0, "3-6 years"));
+        toyRoom.addToy(new Doll("Bear Teddy", 14.5, "6-12 months"));
+        toyRoom.addToy(new Ball("Yellow Ball", 5.0, "6-12 months"));
+        toyRoom.addToy(new Ball("Big Blue Ball", 7.0, "1-3 years"));
+        toyRoom.addToy(new Ball("Football Ball", 12.5, "6-10 years"));
+        toyRoom.addToy(new Cube("Cubes with pictures", 6.5, "6-12 months"));
+        toyRoom.addToy(new Cube("Cubes with letters", 9.0, "3-6 years"));
+        toyRoom.addToy(new Cube("Rubik's Cube", 14.0, "6-10 years"));
+
+        boolean exit = false;
+        Scanner scanner = new Scanner(System.in);
+
+        while (!exit) {
+            System.out.println("\n Select an option:");
+            System.out.println("  1 - Display all toys;");
+            System.out.println("  2 - Find toy by price range;");
+            System.out.println("  3 - Sort toys by price;");
+            System.out.println("  4 - Find a toy by name;");
+            System.out.println("  Q - Quit;\n");
+
+            String option = scanner.nextLine();
+
+            switch (option.toLowerCase()) {
+                case "1":
+                    System.out.println(" Toys in the Toy Room:");
+                    toyRoom.displayToys();
+                    break;
+                case "2":
+                    System.out.print(" Enter the minimum price for the toy: ");
+                    double minPrice = scanner.nextDouble();
+                    scanner.nextLine();
+
+                    System.out.print(" Enter the maximum price for the toy: ");
+                    double maxPrice;
+                    do {
+                        maxPrice = scanner.nextDouble();
+                        scanner.nextLine();
+
+                        if (minPrice >= maxPrice) {
+                            System.out.println(" Error: The minimum price must be less than the maximum price. Please try again.");
+                            System.out.print(" Enter the maximum price for the toy: ");
+                        }
+                    } while (minPrice >= maxPrice);
+
+                    List<Toy> foundToys = toyRoom.findToysByPriceRange(minPrice, maxPrice);
+                    if (!foundToys.isEmpty()) {
+                        System.out.println("\n Found toys within the price range:");
+                        System.out.println(" -------------------------------------------------------");
+                        System.out.printf(" | %-20s | %-10s | %-15s |\n", "Name", "Price ($)", "Age Group");
+                        System.out.println(" |----------------------|------------|-----------------|");
+                        for (Toy toy : foundToys) {
+                            System.out.printf(" | %-20s | %-10.2f | %-15s |\n", toy.name, toy.price, toy.ageGroup);
+                        }
+                        System.out.println(" -------------------------------------------------------");
+                    } else {
+                        System.out.println("\n No toys found within the price range.");
+                    }
+                    break;
+
+                case "3":
+                    System.out.println(" Choose the sorting order:");
+                    System.out.println("  A - Ascending");
+                    System.out.println("  D - Descending");
+                    String sortOrder = scanner.nextLine();
+
+                    boolean ascending = true;
+                    if (sortOrder.equalsIgnoreCase("D")) {
+                        ascending = false;
+                    }
+
+                    toyRoom.sortToys(ascending);
+                    System.out.println("\n Toys in the Toy Room after sorting:");
+                    toyRoom.displayToys();
+                    break;
+
+                case "4":
+                    System.out.print(" Enter the toy name: ");
+                    String toyName = scanner.nextLine();
+
+                    toyRoom.findToysByName(toyName);
+                    break;
+
+                case "q":
+                    exit = true;
+                    System.out.println(" Program exited. Thank you!");
+                    break;
+                default:
+                    System.out.println(" Invalid option. Please try again.");
+            }
+        }
+    }
+}

lab1 fedoniuk

@@ -0,0 +1,96 @@
+import java.util.Scanner;
+
+public class lab1 {
+    public static void main(String[] args) {
+        int C2, C3, C5;
+        var C7 = 0;
+
+        Scanner id = new Scanner(System.in);
+        System.out.print("Enter the student's ID number: ");
+        int idbook = id.nextInt();
+
+        C2 = idbook % 2;
+        C3 = idbook % 3;
+        C5 = idbook % 5;
+        C7 = idbook % 7;
+
+        String[] oper1 = {"+", "-"};
+        String[] oper2 = {"*", "/", "%", "+", "-"};
+        String[] oper3 = {"byte", "short", "int", "long", "char", "float", "double"};
+
+        int C = C3;
+
+        String O1 = oper1[C2];
+        String O2 = oper2[C5];
+        String O3 = oper3[C7];
+
+        System.out.println("C2 is: " + C2 + ", operation is: " + O1);
+        System.out.println("C3 = " + C);
+        System.out.println("C5 is: " + C5 + ", operation is: " + O2);
+        System.out.println("C7 is: " + C7 + ", Type of indexes i and j is: " + O3);
+
+        double i = 0;
+        double j = 0;
+        System.out.println("\nEnter a values for lower limits (i and j) in the "+ O3+" type: ");
+        switch (O3) {
+            case "byte" -> {
+                i = id.nextByte();
+                j = id.nextByte();
+            }
+            case "short" -> {
+                i = id.nextShort();
+                j = id.nextShort();
+            }
+            case "int" -> {
+                i = id.nextInt();
+                j = id.nextInt();
+            }
+            case "long" -> {
+                i = id.nextLong();
+                j = id.nextLong();
+            }
+            case "char" -> {
+                i = id.next().charAt(0);
+                j = id.next().charAt(0);
+            }
+            case "float" -> {
+                i = id.nextFloat();
+                j = id.nextFloat();
+            }
+            case "double" -> {
+                i = id.nextDouble();
+                j = id.nextDouble();
+            }
+        }
+
+        System.out.println("The value of the created variables is: " + i + " and " + j);
+        System.out.println("Enter values for top limits (n and m):");
+        int n, m;
+        n = id.nextInt();
+        m = id.nextInt();
+
+        double sum = 0, res = 0, res2 = 0;
+
+        if ((O1.equals("-") && i + n >= C && i <= C) || i > n || j > m || (C == 0 && i == 0)) {
+            System.out.println("Incorrect input, try another values");
+        } else {
+            for (double a = i; a <= n; a++) {
+                for (double b = j; b <= m; b++) {
+                    switch (O1) {
+                        case "+" -> res = a + C;
+                        case "-" -> res = a - C;
+                    }
+                    switch (O2) {
+                        case "+" -> res2 = a + b;
+                        case "-" -> res2 = a - b;
+                        case "*" -> res2 = a * b;
+                        case "/" -> res2 = a / b;
+                        case "%" -> res2 = a % b;
+                    }
+                    sum += res2 / res;
+                }
+            }
+            System.out.println("Sum is: " + sum);
+        }
+    }
+}

lab2

@@ -0,0 +1,76 @@
+import java.util.Scanner;
+import java.util.Random;
+
+public class Lab2 {
+    public static void main(String[] args) {
+        int C5, C11, C7;
+        int idbook = 2430;
+
+        C5 = idbook % 5;
+        C7 = idbook % 7;
+        C11 = idbook % 11;
+
+        System.out.println("C5 = " + C5 + " - Action between matrix is: C=a×B, a - const");
+        System.out.println("C7 = " + C7 + " - The matrix elements type is: byte");
+        System.out.println("C11 = " + C11 + " - The action with matrix C is: Find the matrix elements' average value");
+
+        Scanner sc = new Scanner(System.in);
+        System.out.print("\n Enter the number of rows: ");
+        int rows = sc.nextInt();
+        System.out.print(" Enter the number of columns: ");
+        int cols = sc.nextInt();
+        int min = 0;
+        int max = 0;
+        boolean valid = false;
+        while (!valid) {
+            System.out.print("\n Enter the minimum value of the matrix numbers (-128 to 127): ");
+            min = sc.nextInt();
+            System.out.print(" Enter the maximum value of the matrix numbers (-128 to 127): ");
+            max = sc.nextInt();
+            if (min >= -128 && max <= 127 && min < max) {
+                valid = true;
+            } else {
+                System.out.println("\nInvalid input. Please enter the values again.");
+            }
+        }
+        byte[][] matrix = new byte[rows][cols];
+        Random rand = new Random();
+        for (int i = 0; i < rows; i++) {
+            for (int j = 0; j < cols; j++) {
+                matrix[i][j] = (byte) (rand.nextInt(max - min + 1) + min);
+            }
+        }
+        System.out.println("\nThe matrix is:");
+        for (int i = 0; i < rows; i++) {
+            for (int j = 0; j < cols; j++) {
+                System.out.printf(" %-5d", matrix[i][j]);
+            }
+            System.out.println();
+        }
+
+        System.out.print("\nEnter the constant to multiply the matrix by: ");
+        int constant = sc.nextInt();
+        byte[][] multipliedMatrix = new byte[rows][cols];
+        System.out.println(" The matrix multiplied by " + constant + " is:");
+        for (int i = 0; i < rows; i++) {
+            for (int j = 0; j < cols; j++) {
+                multipliedMatrix[i][j] = (byte) (matrix[i][j] * constant);
+                System.out.printf(" %-5d", multipliedMatrix[i][j]);
+            }
+            System.out.println();
+        }
+
+        System.out.println("\n Press 'enter' to search for the average value of the matrix.");
+        sc.nextLine();
+        sc.nextLine();
+        int sum = 0;
+        for (int i = 0; i < rows; i++) {
+            for (int j = 0; j < cols; j++) {
+                sum += multipliedMatrix[i][j];
+            }
+        }
+        double average = (double) sum / (rows * cols);
+        System.out.println("The average value of the multiplied matrix is: " + average);
+    }
+}
+

lab3

@@ -0,0 +1,63 @@
+import java.util.Scanner;
+
+public class Lab5 {
+    public static void main(String[] args) {
+
+        int C17 = 2430 % 17;
+        System.out.println("\n---------------------------------------------------------------------------------------------------------------------");
+        System.out.println("  C17 = " + C17 + ", So, the task is:  delete all previous occurrences of the last letter of each word of the specified text");
+        System.out.println("---------------------------------------------------------------------------------------------------------------------");
+
+        Scanner scanner = new Scanner(System.in);
+        String input = null;
+        while (input == null || input.isEmpty()) {
+            System.out.print("\nEnter a string: ");
+            input = scanner.nextLine();
+        }
+        try {
+            StringBuilder sb = new StringBuilder(input);
+            String[] words = sb.toString().split("\\s+");
+            for (int i = 0; i < words.length; i++) {
+                String word = words[i];
+                char lastChar = word.charAt(word.length() - 1);
+                if (!Character.isLetterOrDigit(lastChar)) {
+                    // Last character is a punctuation mark
+                    int lastLetterIndex = -1;
+                    for (int j = word.length() - 2; j >= 0; j--) {
+                        if (Character.isLetter(word.charAt(j))) {
+                            lastLetterIndex = j;
+                            break;
+                        }
+                    }
+                    if (lastLetterIndex != -1) {
+                        char lastLetter = word.charAt(lastLetterIndex);
+                        String newWord = "";
+                        for (int j = 0; j < word.length() - 1; j++) {
+                            if (!Character.isLetterOrDigit(word.charAt(j)) || word.charAt(j) != lastLetter) {
+                                newWord += word.charAt(j);
+                            }
+                        }
+                        newWord += lastChar;
+                        words[i] = newWord;
+                    }
+                } else {
+                    // Last character is a letter or a digit
+                    char lastLetter = lastChar;
+                    String newWord = "";
+                    for (int j = 0; j < word.length() - 1; j++) {
+                        if (!Character.isLetterOrDigit(word.charAt(j)) || word.charAt(j) != lastLetter) {
+                            newWord += word.charAt(j);
+                        }
+                    }
+                    newWord += lastLetter;
+                    words[i] = newWord;
+                }
+            }
+            System.out.print("\nFinal string: ");
+            System.out.println(String.join(" ", words));
+        } catch (Exception e) {
+            System.out.println("An error occurred: " + e.getMessage());
+        }
+    }
+}
+

lab4

@@ -0,0 +1,115 @@
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.Scanner;
+
+public class Lab4 {
+
+    public static class Student {
+        private int grBook;
+        private String name;
+        private int age;
+        private double gpa;
+        private String faculty;
+
+        public Student(int grBook, String name, int age, double gpa, String faculty) {
+            this.grBook = grBook;
+            this.name = name;
+            this.age = age;
+            this.gpa = gpa;
+            this.faculty = faculty;
+        }
+
+        public int getGrBook() {
+            return grBook;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public int getAge() {
+            return age;
+        }
+
+        public double getGpa() {
+            return gpa;
+        }
+
+        public String getFaculty() {
+            return faculty;
+        }
+    }
+
+    public static void main(String[] args) {
+
+        int C11 = 2430 % 11;
+        System.out.println("\n  ----------------------------------------------------------------------------------------------------------");
+        System.out.println("          C11 = " + C11 + ", So, the task is:  Define the student class, which consists of at least 5 fields.");
+        System.out.println("  ----------------------------------------------------------------------------------------------------------");
+
+        Student[] students = {
+                new Student(1010, "Вікторія", 21, 84.6, "ФІОТ"),
+                new Student(2010, "Дарія", 20, 79.8, "РТФ"),
+                new Student(3010, "Анатолій", 19, 94.3, "ХТФ"),
+                new Student(4040, "Генадій", 22, 62.0, "ІХФ"),
+                new Student(5050, "Борис", 18, 89.1, "ФММ")
+        };
+
+        Scanner scanner = new Scanner(System.in);
+        boolean quit = false;
+        while (!quit) {
+
+            System.out.print("\nEnter the field to sort by (greed book, name, age, gpa, faculty) or enter 'quit' to exit: ");
+            String input = scanner.nextLine();
+
+            if (!input.equals("greed book") && !input.equals("name") && !input.equals("age") && !input.equals("gpa") && !input.equals("faculty") && !input.equals("quit")) {
+                System.out.println("Invalid field to sort by! Please enter 'grBook', 'name', 'age', 'gpa', or 'faculty'.");
+                continue;
+            }
+            if (input.equals("quit")) {
+                quit = true;
+                System.out.println("Thank you for using my program:)");
+                continue;
+            }
+
+            String field = input;
+            System.out.print("Enter the sort order (asc or desc): ");
+            String order = scanner.nextLine();
+
+            if (!order.equals("asc") && !order.equals("desc")) {
+                System.out.println("Invalid sort order! Please enter 'asc' or 'desc'.");
+                continue;
+            }
+
+            Comparator<Student> comparator = null;
+            switch (field) {
+                case "greed book":
+                    comparator = Comparator.comparingInt(Student::getGrBook);
+                    break;
+                case "name":
+                    comparator = Comparator.comparing(Student::getName);
+                    break;
+                case "age":
+                    comparator = Comparator.comparingInt(Student::getAge);
+                    break;
+                case "gpa":
+                    comparator = Comparator.comparingDouble(Student::getGpa);
+                    break;
+                case "faculty":
+                    comparator = Comparator.comparing(Student::getFaculty);
+                    break;
+            }
+            if (order.equals("desc")) {
+                comparator = comparator.reversed();
+            }
+            Arrays.sort(students, comparator);
+
+            System.out.println("\nSorted by " + field + " (in " + order + "ending order):");
+            System.out.println(String.format("%n%-15s | %-20s | %-4s | %-4s | %-10s", "Greed book", "Name", "Age", "GPA", " Faculty"));
+            System.out.println("----------------------------------------------------------------");
+            for (Student student : students) {
+                System.out.println(String.format("%-15d | %-20s | %-4d | %-3.1f | %-10s", student.getGrBook(), student.getName(), student.getAge(), student.getGpa(), student.getFaculty()));
+            }
+        }
+    }
+}

src/encapsulationInheritancePolymorphism/inheritance/ElectricEngine.java

@@ -0,0 +1,5 @@
+package encapsulationInheritancePolymorphism.inheritance;
+
+public class ElectricEngine extends Engine {
+    private String batteryType;
+}

src/encapsulationInheritancePolymorphism/inheritance/Engine.java

@@ -0,0 +1,5 @@
+package encapsulationInheritancePolymorphism.inheritance;
+
+public class Engine {
+    private int power;
+}

src/encapsulationInheritancePolymorphism/inheritance/Main.java

@@ -0,0 +1,7 @@
+package encapsulationInheritancePolymorphism.inheritance;
+
+public class Main {
+    public static void main(String[] args) {
+        ElectricEngine electricEngine = new ElectricEngine();
+    }
+}