Delete .vs directory

.gitignore

@@ -1,2 +0,0 @@
-# Project exclude paths
-/out/

Lab2/Program.cs

@@ -0,0 +1,32 @@
+using System;
+
+public class Laba2
+{
+    
+
+    public static void Main(string[] args)
+    {
+        const int a = 2;
+        int[][] b = new[]
+        {
+            new int[] { 1, 2, 8 },
+            new int[] { 3, 4, 5 },
+            new int[] { 6, 7, 9 }
+        };
+        calculation(b, a);
+    }
+
+    private static int[][] calculation(int[][] b, int a)
+    {
+        int[][]c = new int[b.Length][b[0].Length]; //недопустимий специфікатор рангу: вимагається "," або "]";
+        for (int i = 0; i < b.Length; i++)
+        {
+            c[i] = new int[b[i].Length];
+            for (int j = 0; j < b[i].Length; j++)
+            {
+                c[i][j] = b[i][j] * a;
+            }
+        }
+        return c;
+    }
+}

Lab5

@@ -1,184 +0,0 @@
-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

@@ -1,225 +0,0 @@
-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.");
-            }
-        }
-    }
-}

OOP_IO-2x_2023.iml

@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" inherit-compiler-output="true">
-    <exclude-output />
-    <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
-    </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>

lab1 fedoniuk

@@ -1,96 +0,0 @@
-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);
-        }
-    }
-}

lab1_with_extracted_method/Program.cs

@@ -0,0 +1,61 @@
+using System;
+
+public class Lab1
+{
+    public static void Main(String[] args)
+    {
+        /*o1 = +
+         c3 = 0
+         o2 = *
+         c7 = short */
+
+        // var A = 4;
+        // short B = 3;
+        // var N = 10;
+        // var M = 10;
+        //
+        // var C = 1;
+        // var s = 0;
+        //
+        // bool divisionByZero=false;
+
+
+        Calculation(4, 3, 10, 10, 1, false);
+    }
+
+    public static void Calculation(int A, int C, int N, short B, int M, bool divisionByZero)
+    {
+        var s = 0;
+        if ((A <= -C && -C <= N) || (B <= 0 && 0 <= M))
+        {
+            Console.WriteLine("Division by zero!");
+            return;
+        }
+
+        for (int i = A; i <= N; i++)
+        {
+            if (i + C == 0)
+            {
+                Console.WriteLine("Division by zero!");
+                divisionByZero = true;
+                break;
+            }
+
+            for (short j = B; j <= M; j++)
+            {
+                if (j == 0)
+                {
+                    Console.WriteLine("Оскільки j = 0, то сума просто буде 0");
+                    break;
+                }
+
+                s += (i * j) / (i + C);
+            }
+        }
+
+        if (!divisionByZero)
+        {
+            Console.WriteLine($"s = {s};");
+        }
+    }
+}

lab1_with_extracted_method/lab1_with_extracted_method.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

lab1_with_extracted_method/lab1_with_extracted_method.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.3.32901.215
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "lab1_with_extracted_method", "lab1_with_extracted_method.csproj", "{24A496CD-EC4E-4EBB-AD75-5C0C0EFDC4D8}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{24A496CD-EC4E-4EBB-AD75-5C0C0EFDC4D8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{24A496CD-EC4E-4EBB-AD75-5C0C0EFDC4D8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{24A496CD-EC4E-4EBB-AD75-5C0C0EFDC4D8}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{24A496CD-EC4E-4EBB-AD75-5C0C0EFDC4D8}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {BB8782D1-9F42-4685-8447-6B8E6181678C}
+	EndGlobalSection
+EndGlobal

lab1_with_extracted_method/obj/Debug/net6.0/.NETCoreApp,Version=v6.0.AssemblyAttributes.cs

@@ -0,0 +1,4 @@
+// <autogenerated />
+using System;
+using System.Reflection;
+[assembly: global::System.Runtime.Versioning.TargetFrameworkAttribute(".NETCoreApp,Version=v6.0", FrameworkDisplayName = "")]

lab1_with_extracted_method/obj/Debug/net6.0/lab1_with_extracted_method.AssemblyInfo.cs

@@ -0,0 +1,23 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     Этот код создан программой.
+//     Исполняемая версия:4.0.30319.42000
+//
+//     Изменения в этом файле могут привести к неправильной работе и будут потеряны в случае
+//     повторной генерации кода.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Reflection;
+
+[assembly: System.Reflection.AssemblyCompanyAttribute("lab1_with_extracted_method")]
+[assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
+[assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
+[assembly: System.Reflection.AssemblyProductAttribute("lab1_with_extracted_method")]
+[assembly: System.Reflection.AssemblyTitleAttribute("lab1_with_extracted_method")]
+[assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
+
+// Создано классом WriteCodeFragment MSBuild.
+

lab1_with_extracted_method/obj/Debug/net6.0/lab1_with_extracted_method.AssemblyInfoInputs.cache

@@ -0,0 +1 @@
+b0d331248e7cf508f22410bff3fa4c5190b3e6ab

lab1_with_extracted_method/obj/Debug/net6.0/lab1_with_extracted_method.GeneratedMSBuildEditorConfig.editorconfig

@@ -0,0 +1,10 @@
+is_global = true
+build_property.TargetFramework = net6.0
+build_property.TargetPlatformMinVersion = 
+build_property.UsingMicrosoftNETSdkWeb = 
+build_property.ProjectTypeGuids = 
+build_property.InvariantGlobalization = 
+build_property.PlatformNeutralAssembly = 
+build_property._SupportedPlatformList = Linux,macOS,Windows
+build_property.RootNamespace = lab1_with_extracted_method
+build_property.ProjectDir = C:\Users\user\source\repos\OOP_IO-2x_2023\lab1_with_extracted_method\

lab1_with_extracted_method/obj/Debug/net6.0/lab1_with_extracted_method.GlobalUsings.g.cs

@@ -0,0 +1,8 @@
+// <auto-generated/>
+global using global::System;
+global using global::System.Collections.Generic;
+global using global::System.IO;
+global using global::System.Linq;
+global using global::System.Net.Http;
+global using global::System.Threading;
+global using global::System.Threading.Tasks;

lab1_with_extracted_method/obj/lab1_with_extracted_method.csproj.nuget.dgspec.json

@@ -0,0 +1,68 @@
+{
+  "format": 1,
+  "restore": {
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+  },
+  "projects": {
+    "C:\\Users\\user\\source\\repos\\OOP_IO-2x_2023\\lab1_with_extracted_method\\lab1_with_extracted_method.csproj": {
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+      "restore": {
+        "projectUniqueName": "C:\\Users\\user\\source\\repos\\OOP_IO-2x_2023\\lab1_with_extracted_method\\lab1_with_extracted_method.csproj",
+        "projectName": "lab1_with_extracted_method",
+        "projectPath": "C:\\Users\\user\\source\\repos\\OOP_IO-2x_2023\\lab1_with_extracted_method\\lab1_with_extracted_method.csproj",
+        "packagesPath": "C:\\Users\\user\\.nuget\\packages\\",
+        "outputPath": "C:\\Users\\user\\source\\repos\\OOP_IO-2x_2023\\lab1_with_extracted_method\\obj\\",
+        "projectStyle": "PackageReference",
+        "fallbackFolders": [
+          "C:\\Program Files (x86)\\Microsoft Visual Studio\\Shared\\NuGetPackages"
+        ],
+        "configFilePaths": [
+          "C:\\Users\\user\\AppData\\Roaming\\NuGet\\NuGet.Config",
+          "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.FallbackLocation.config",
+          "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.Offline.config"
+        ],
+        "originalTargetFrameworks": [
+          "net6.0"
+        ],
+        "sources": {
+          "C:\\Program Files (x86)\\Microsoft SDKs\\NuGetPackages\\": {},
+          "C:\\Program Files\\dotnet\\library-packs": {},
+          "https://api.nuget.org/v3/index.json": {}
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+        "frameworks": {
+          "net6.0": {
+            "targetAlias": "net6.0",
+            "projectReferences": {}
+          }
+        },
+        "warningProperties": {
+          "warnAsError": [
+            "NU1605"
+          ]
+        }
+      },
+      "frameworks": {
+        "net6.0": {
+          "targetAlias": "net6.0",
+          "imports": [
+            "net461",
+            "net462",
+            "net47",
+            "net471",
+            "net472",
+            "net48",
+            "net481"
+          ],
+          "assetTargetFallback": true,
+          "warn": true,
+          "frameworkReferences": {
+            "Microsoft.NETCore.App": {
+              "privateAssets": "all"
+            }
+          },
+          "runtimeIdentifierGraphPath": "C:\\Program Files\\dotnet\\sdk\\6.0.401\\RuntimeIdentifierGraph.json"
+        }
+      }
+    }
+  }
+}

lab1_with_extracted_method/obj/lab1_with_extracted_method.csproj.nuget.g.props

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
+    <RestoreSuccess Condition=" '$(RestoreSuccess)' == '' ">True</RestoreSuccess>
+    <RestoreTool Condition=" '$(RestoreTool)' == '' ">NuGet</RestoreTool>
+    <ProjectAssetsFile Condition=" '$(ProjectAssetsFile)' == '' ">$(MSBuildThisFileDirectory)project.assets.json</ProjectAssetsFile>
+    <NuGetPackageRoot Condition=" '$(NuGetPackageRoot)' == '' ">$(UserProfile)\.nuget\packages\</NuGetPackageRoot>
+    <NuGetPackageFolders Condition=" '$(NuGetPackageFolders)' == '' ">C:\Users\user\.nuget\packages\;C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages</NuGetPackageFolders>
+    <NuGetProjectStyle Condition=" '$(NuGetProjectStyle)' == '' ">PackageReference</NuGetProjectStyle>
+    <NuGetToolVersion Condition=" '$(NuGetToolVersion)' == '' ">6.3.0</NuGetToolVersion>
+  </PropertyGroup>
+  <ItemGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
+    <SourceRoot Include="C:\Users\user\.nuget\packages\" />
+    <SourceRoot Include="C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages\" />
+  </ItemGroup>
+</Project>

lab1_with_extracted_method/obj/lab1_with_extracted_method.csproj.nuget.g.targets

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" />

lab1_with_extracted_method/obj/project.assets.json

@@ -0,0 +1,74 @@
+{
+  "version": 3,
+  "targets": {
+    "net6.0": {}
+  },
+  "libraries": {},
+  "projectFileDependencyGroups": {
+    "net6.0": []
+  },
+  "packageFolders": {
+    "C:\\Users\\user\\.nuget\\packages\\": {},
+    "C:\\Program Files (x86)\\Microsoft Visual Studio\\Shared\\NuGetPackages": {}
+  },
+  "project": {
+    "version": "1.0.0",
+    "restore": {
+      "projectUniqueName": "C:\\Users\\user\\source\\repos\\OOP_IO-2x_2023\\lab1_with_extracted_method\\lab1_with_extracted_method.csproj",
+      "projectName": "lab1_with_extracted_method",
+      "projectPath": "C:\\Users\\user\\source\\repos\\OOP_IO-2x_2023\\lab1_with_extracted_method\\lab1_with_extracted_method.csproj",
+      "packagesPath": "C:\\Users\\user\\.nuget\\packages\\",
+      "outputPath": "C:\\Users\\user\\source\\repos\\OOP_IO-2x_2023\\lab1_with_extracted_method\\obj\\",
+      "projectStyle": "PackageReference",
+      "fallbackFolders": [
+        "C:\\Program Files (x86)\\Microsoft Visual Studio\\Shared\\NuGetPackages"
+      ],
+      "configFilePaths": [
+        "C:\\Users\\user\\AppData\\Roaming\\NuGet\\NuGet.Config",
+        "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.FallbackLocation.config",
+        "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.Offline.config"
+      ],
+      "originalTargetFrameworks": [
+        "net6.0"
+      ],
+      "sources": {
+        "C:\\Program Files (x86)\\Microsoft SDKs\\NuGetPackages\\": {},
+        "C:\\Program Files\\dotnet\\library-packs": {},
+        "https://api.nuget.org/v3/index.json": {}
+      },
+      "frameworks": {
+        "net6.0": {
+          "targetAlias": "net6.0",
+          "projectReferences": {}
+        }
+      },
+      "warningProperties": {
+        "warnAsError": [
+          "NU1605"
+        ]
+      }
+    },
+    "frameworks": {
+      "net6.0": {
+        "targetAlias": "net6.0",
+        "imports": [
+          "net461",
+          "net462",
+          "net47",
+          "net471",
+          "net472",
+          "net48",
+          "net481"
+        ],
+        "assetTargetFallback": true,
+        "warn": true,
+        "frameworkReferences": {
+          "Microsoft.NETCore.App": {
+            "privateAssets": "all"
+          }
+        },
+        "runtimeIdentifierGraphPath": "C:\\Program Files\\dotnet\\sdk\\6.0.401\\RuntimeIdentifierGraph.json"
+      }
+    }
+  }
+}

lab1_with_extracted_method/obj/project.nuget.cache

@@ -0,0 +1,8 @@
+{
+  "version": 2,
+  "dgSpecHash": "VANdgElQYYOqAx91vfx9p1GWZX21FI7KRMpKYjMOBS/jaQDmnFh4D1hrZpo4+AA4DT9ZmEVXEUNcGLuCaXreTA==",
+  "success": true,
+  "projectFilePath": "C:\\Users\\user\\source\\repos\\OOP_IO-2x_2023\\lab1_with_extracted_method\\lab1_with_extracted_method.csproj",
+  "expectedPackageFiles": [],
+  "logs": []
+}

lab2

@@ -1,76 +0,0 @@
-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

@@ -1,63 +0,0 @@
-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

@@ -1,115 +0,0 @@
-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()));
-            }
-        }
-    }
-}

laboratorna1/Program.cs

@@ -0,0 +1,52 @@
+using System;
+
+public class Lab1
+{
+    public static void Main(String[] args)
+    {
+        /*o1 = +
+         c3 = 0
+         o2 = *
+         c7 = short */
+
+         var A = 4;
+         short B = 3;
+         var N = 10;
+         var M = 10;
+
+         var C = 1;
+         var s = 0;
+
+         bool divisionByZero=false;
+
+
+        if ((A <= -C && -C <= N) || (B <= 0 && 0 <= M))
+        {
+            Console.WriteLine("Division by zero!");
+            return;
+        }
+      
+        for (int i = A; i <= N; i++)
+        {
+            if (i + C == 0) { 
+                Console.WriteLine("Division by zero!");
+                divisionByZero = true;
+                break; 
+            }
+            for (short j = B; j <= M; j++)
+            {
+                if (j == 0) {
+                    Console.WriteLine("Оскільки j = 0, то сума просто буде 0");
+                    break;
+                }
+                s += (i * j) / (i + C);
+            }
+        }
+
+        if (!divisionByZero)
+        {
+            Console.WriteLine($"s = {s};" );
+        }
+
+    }
+}

src/Lab1.java

@@ -0,0 +1,58 @@
+public class Lab1 {
+    public static void main(String[] args) {
+//        char c = 'a' + '1';
+        char c = 97;
+//        char c = '1';
+        System.out.println(c);
+        System.out.println((int) c);
+        c++;
+        System.out.println(c);
+        System.out.println((int) c);
+        System.out.println((double)'1'/'3');
+
+//        System.out.println( (double) 0 / 0 );
+//        System.out.println( Math.sqrt(-1) );
+        double s = 0;
+        /*for (int i = 1; i <= 3; i++) { // 1) ��������� � i = 1, 2) ���� � <= 3, 3) �������� 䳿 � �� �����,
+            System.out.println(i);     // 4) �������������� � �� 1, 5) ����������� �� ����� 2
+//            s = s + i;
+            s += i;
+        }*/
+        /*int[] array = new int[2];
+        for (int i = 0; i < array.length; i++) {
+
+        }*/
+        final int A = -3;
+        final int B = 0;
+        final int N = 2;
+        final int M = 2;
+
+        final int C = 1;
+//        boolean wasDivisionByZero = false;
+//        todo char
+//        todo[clear code] think about avoiding brackets
+        if ((A <= -C && -C <= N) || (B <= 0 && 0 <= M)) {
+            System.out.println("Division by zero!");
+            return;
+        }
+/*myLabel:*/for (int i = A; i <= N /*&& !wasDivisionByZero*/; i++) {
+            /*if (i + C == 0) { // todo optimize
+                System.out.println("Division by zero!");
+                wasDivisionByZero = true;
+                break; //todo flag vs return;
+            }*/
+            for (int j = B; j <= M; j++) {
+                /*if (j == 0) {
+                    System.out.println("Division by zero!");
+                    return;
+//                    wasDivisionByZero = true;
+//                    break myLabel;
+                }*/
+                s += (double) (i / j) / (i + C);
+            }
+        }
+//        if (!wasDivisionByZero) {
+            System.out.println("s = " + s);
+//        }
+    }
+}

src/Lab2.java

@@ -0,0 +1,26 @@
+public class Lab2 {
+    public static void main(String[] args) {
+        int[] array = {1, 2, 3};
+        /*for (int i = 0; i < array.length; i++) {
+            if (i % 2 == 0) {
+                System.out.println("!" + array[i]);
+            } else {
+                System.out.println("?" + array[i]);
+            }
+        }*/
+
+        for (int i = 0; i < array.length; i+=2) {
+            System.out.println("!" + array[i]);
+        }
+
+        for (int i = 1; i < array.length; i+=2) {
+            System.out.println("?" + array[i]);
+        }
+
+//        зубчасті матриці
+        int[][] matrix = {
+                {1, 2},
+                {3}
+        };
+    }
+}

src/Main.java

@@ -1,8 +1,35 @@
 public class Main {
     public static void main(String[] args) {
-        System.out.println(args[1]);
+        System.out.println(args[2]);
         System.out.println("Hello world!");
 //        System.out.println(1);
+
+        int a = 1;
+        int b = 2;
+        int c = 1;
+        int d = 1;
+
+        System.out.println(2&1);
+        System.out.println(2|1);
+        int aa = 2;
+
+        /*if (aa) {
+
+        }*/
+
+//        System.out.println("a"&"b");
+        System.out.println('a'&'b');
+
+        if ((a > b) & MyBooleanMethod()) {
+            System.out.println("?????????????????????????");
+        }
+
+
+    }
+
+    static boolean MyBooleanMethod() {
+        System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+        return true;
     }
 
     void myFunction() {

src/encapsulationInheritancePolymorphism/inheritance/ElectricEngine.java

@@ -2,4 +2,8 @@ package encapsulationInheritancePolymorphism.inheritance;
 
 public class ElectricEngine extends Engine {
     private String batteryType;
+
+    /*private class Engine {
+        private int power;
+    }*/
 }

src/encapsulationInheritancePolymorphism/inheritance/FuelEngine.java

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

src/encapsulationInheritancePolymorphism/inheritance/Main.java

@@ -2,6 +2,7 @@ package encapsulationInheritancePolymorphism.inheritance;
 
 public class Main {
     public static void main(String[] args) {
-        ElectricEngine electricEngine = new ElectricEngine();
+        ElectricEngine electricEngine = new ElectricEngine(); // створення нового об'єкту (екземпляру) класу ElectricEngine
+        FuelEngine fuelEngine = new FuelEngine();
     }
 }

src/encapsulationInheritancePolymorphism/polymorphism/ElectricEngine.java

@@ -0,0 +1,14 @@
+package encapsulationInheritancePolymorphism.polymorphism;
+
+public class ElectricEngine extends Engine {
+    private String batteryType;
+
+    @Override
+    public int getPower() {
+        return 20;
+    }
+
+    /*private class Engine {
+        private int power;
+    }*/
+}

src/encapsulationInheritancePolymorphism/polymorphism/Engine.java

@@ -0,0 +1,9 @@
+package encapsulationInheritancePolymorphism.polymorphism;
+
+public class Engine {
+    private int power;
+
+    public int getPower() {
+        return power;
+    }
+}

src/encapsulationInheritancePolymorphism/polymorphism/FuelEngine.java

@@ -0,0 +1,10 @@
+package encapsulationInheritancePolymorphism.polymorphism;
+
+public class FuelEngine extends Engine {
+    private String fuelType;
+
+    @Override
+    public int getPower() {
+        return 50;
+    }
+}

src/encapsulationInheritancePolymorphism/polymorphism/Main.java

@@ -0,0 +1,38 @@
+package encapsulationInheritancePolymorphism.polymorphism;
+
+/*import encapsulationInheritancePolymorphism.inheritance.ElectricEngine;
+import encapsulationInheritancePolymorphism.inheritance.FuelEngine;*/
+
+public class Main {
+    public static void main(String[] args) {
+        /*encapsulationInheritancePolymorphism.inheritance.*/ElectricEngine electricEngine = new ElectricEngine(); // створення нового об'єкту (екземпляру) класу ElectricEngine
+        /*encapsulationInheritancePolymorphism.inheritance.*/FuelEngine fuelEngine = new FuelEngine();
+
+        Engine engine1 = fuelEngine;
+
+        Engine[] engines = {
+                electricEngine,
+                fuelEngine
+        };
+
+        for (Engine engine : engines) {
+            System.out.println(engine.getPower());
+        }
+
+        /*for (int i = 0; i < engines.length; i++) {
+            System.out.println(engines[i].getPower());
+        }*/
+
+//        +
+        int a = 1;
+        int b = 1;
+        int c = a + b;
+        System.out.println(c);
+
+
+        String sA = "1";
+        String sB = "1";
+        String sC = sA + sB;
+        System.out.println(sC);
+    }
+}

src/encapsulationInheritancePolymorphism/polymorphism/enhanced/ElectricEngine.java

@@ -0,0 +1,19 @@
+package encapsulationInheritancePolymorphism.polymorphism.enhanced;
+
+public class ElectricEngine extends Engine {
+    private String batteryType;
+    private int chargeLevel = 9;
+    private int criticalChargeLevel = 10;
+    private float coefficientCriticalPowerCut = 0.1f;
+
+    @Override
+    public int getPower() {
+        return chargeLevel > criticalChargeLevel
+                ? super.getPower()
+                : (int) (super.getPower() * coefficientCriticalPowerCut);
+    }
+
+    /*private class Engine {
+        private int power;
+    }*/
+}

src/encapsulationInheritancePolymorphism/polymorphism/enhanced/Engine.java

@@ -0,0 +1,9 @@
+package encapsulationInheritancePolymorphism.polymorphism.enhanced;
+
+public class Engine {
+    private int power = 100;
+
+    public int getPower() {
+        return power;
+    }
+}

src/encapsulationInheritancePolymorphism/polymorphism/enhanced/FuelEngine.java

@@ -0,0 +1,10 @@
+package encapsulationInheritancePolymorphism.polymorphism.enhanced;
+
+public class FuelEngine extends Engine {
+    private String fuelType;
+
+    /*public int getPower() {
+        return 50;
+    }*/
+
+}

src/encapsulationInheritancePolymorphism/polymorphism/enhanced/Main.java

@@ -0,0 +1,28 @@
+package encapsulationInheritancePolymorphism.polymorphism.enhanced;
+
+/*import encapsulationInheritancePolymorphism.inheritance.ElectricEngine;
+import encapsulationInheritancePolymorphism.inheritance.FuelEngine;*/
+
+public class Main {
+    public static void main(String[] args) {
+        /*encapsulationInheritancePolymorphism.inheritance.*/
+        ElectricEngine electricEngine = new ElectricEngine(); // створення нового об'єкту (екземпляру) класу ElectricEngine
+        /*encapsulationInheritancePolymorphism.inheritance.*/
+        FuelEngine fuelEngine = new FuelEngine();
+
+        Engine engine1 = fuelEngine;
+
+        Engine[] engines = {
+                electricEngine,
+                fuelEngine
+        };
+
+        for (Engine engine : engines) {
+            System.out.println(engine.getPower());
+        }
+
+        /*for (int i = 0; i < engines.length; i++) {
+            System.out.println(engines[i].getPower());
+        }*/
+    }
+}

src/encapsulationInheritancePolymorphism/polymorphism/overload/MyClassForOverloadExample.java

@@ -0,0 +1,17 @@
+package encapsulationInheritancePolymorphism.polymorphism.overload;
+
+public class MyClassForOverloadExample {
+    void myMethod(int a) {
+        System.out.println("Integer: " + a);
+    }
+
+    void myMethod(double a) {
+        System.out.println("Double: " + a);
+    }
+
+    public static void main(String[] args) {
+        MyClassForOverloadExample overload = new MyClassForOverloadExample();
+        overload.myMethod(1);
+        overload.myMethod(0.1);
+    }
+}