Create README.md

.gitignore

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 # Project exclude paths
-/out/
+/out/
+# Auto detect text files and perform LF normalization
+* text=auto

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/OOP_IO-2x_2023.iml

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+<?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://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/OOP_IO-2x_2023.iml" filepath="$PROJECT_DIR$/.idea/OOP_IO-2x_2023.iml" />
+      <module fileurl="file://$PROJECT_DIR$/lab1/lab1.iml" filepath="$PROJECT_DIR$/lab1/lab1.iml" />
+      <module fileurl="file://$PROJECT_DIR$/lab2/lab2.iml" filepath="$PROJECT_DIR$/lab2/lab2.iml" />
+      <module fileurl="file://$PROJECT_DIR$/lab3/lab3.iml" filepath="$PROJECT_DIR$/lab3/lab3.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

README.md

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+# Laboratory OOP - IO-2x - 2023

lab1/FunctionCalculator/.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

lab1/FunctionCalculator/.idea/.name

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+Main.java

lab1/FunctionCalculator/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_19" default="true" project-jdk-name="openjdk-19" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

lab1/FunctionCalculator/.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/FunctionCalculator.iml" filepath="$PROJECT_DIR$/FunctionCalculator.iml" />
+    </modules>
+  </component>
+</project>

lab1/FunctionCalculator/FunctionCalculator.iml

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+<?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/FunctionCalculator/src/Main.java

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+import java.util.Scanner;
+public class Main {
+    public static void main(String[] args) {
+        //C2 = 2501 % 2 = 1, і операція O1 буде відніманням (-).
+        //C3 = 2501 % 3 = 2
+        //C5 = 2501 % 5 = 1, і операція O2 буде діленням (/).
+        //C7 = 2501 % 7 = 4, тип індексів i та j буде char.
+        double result = 0;  // результат
+        char i, j;
+        char operation1 = '-';
+        double constant = 2.0;
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Введіть значення n: ");
+        int n = scanner.nextInt();
+        System.out.print("Введіть значення m: ");
+        int m = scanner.nextInt();
+
+        // Обчислення значення функції S
+        for (i = 'a'; i <= 'a' + n - 1; i++) {
+            for (j = 'b'; j <= 'b' + m - 1; j++) {
+                try {
+                    double value = (double) i / applyOperation(j, operation1, constant);
+                    result += value;
+                } catch (ArithmeticException e) {
+                    System.out.println("Ділення на нуль: " + e.getMessage());
+                } catch (Exception e) {
+                    System.out.println("Виникла помилка: " + e.getMessage());
+                }
+            }
+        }
+
+        // Виведення результату
+        System.out.println("Результат: " + result);
+    }
+
+    // Метод, який застосовує операцію О1 до двох чисел
+    public static double applyOperation(char j, char operation, double constant) throws Exception {
+        switch (operation) {
+            case '-':
+                return (double) j - constant;
+            case '/':
+                if (constant == 0.0) {
+                    throw new ArithmeticException("C не може бути рівним нулю");
+                } else {
+                    return (double) j / constant;
+                }
+            default:
+                throw new Exception("Непідтримувана операція: " + operation);
+        }
+    }
+}

lab1/lab1.iml

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+<?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://$MODULE_DIR$/FunctionCalculator/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

lab2/Matrix/.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

lab2/Matrix/.idea/.name

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+Main.java

lab2/Matrix/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_19" default="true" project-jdk-name="openjdk-19" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

lab2/Matrix/.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/Matrix.iml" filepath="$PROJECT_DIR$/Matrix.iml" />
+    </modules>
+  </component>
+</project>

lab2/Matrix/Matrix.iml

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+<?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>

lab2/Matrix/src/Main.java

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+import java.util.Arrays;
+
+public class Main {
+    public static void main(String[] args) {
+        byte[][] matrix = {{4, 7, 3}, {4, 7, 6}, {7, 10, 9}};
+
+        //C5 = 2501 mod 5 = 1, тому C = B^T (транспонування матриці)
+        //C7 = 2501 mod 7 = 1, тому тип елементів матриці має бути byte
+        //C11 = 2501 mod 11 = 10, тому треба знайти середнє значення елементів матриці
+
+        // Виконуємо дію з матрицею: транспонування матриці B
+        byte[][] transposedMatrix = transposeMatrix(matrix);
+        System.out.println("Transposed matrix: ");
+        printMatrix(transposedMatrix);
+
+        // Виконуємо дію з матрицею C: знаходимо середнє значення елементів матриці
+        double average = calculateAverage(transposedMatrix);
+        System.out.println("Cереднє значення елементів матриці: " + average);
+    }
+
+    // Метод для транспонування матриці
+    private static byte[][] transposeMatrix(byte[][] matrix) {
+        int rows = matrix.length;
+        int columns = matrix[0].length;
+
+        byte[][] transposedMatrix = new byte[columns][rows];
+
+        for (int i = 0; i < rows; i++) {
+            for (int j = 0; j < columns; j++) {
+                transposedMatrix[j][i] = matrix[i][j];
+            }
+        }
+
+        return transposedMatrix;
+    }
+
+    // Метод для знаходження середнього значення елементів матриці
+    private static double calculateAverage(byte[][] matrix) {
+        int rows = matrix.length;
+        int columns = matrix[0].length;
+
+        int sum = 0;
+        for (int i = 0; i < rows; i++) {
+            for (int j = 0; j < columns; j++) {
+                sum += matrix[i][j];
+            }
+        }
+
+        return (double) sum / (rows * columns);
+    }
+
+    // Метод для виведення матриці на екран
+    private static void printMatrix(byte[][] matrix) {
+        for (byte[] row : matrix) {
+            System.out.println(Arrays.toString(row));
+        }
+    }
+}

lab2/lab2.iml

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+<?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://$MODULE_DIR$/Matrix/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

lab3/OperationsStrings/.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

lab3/OperationsStrings/.idea/.name

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+Main.java

lab3/OperationsStrings/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_19" default="true" project-jdk-name="openjdk-19" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

lab3/OperationsStrings/.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/OperationsStrings.iml" filepath="$PROJECT_DIR$/OperationsStrings.iml" />
+    </modules>
+  </component>
+</project>

lab3/OperationsStrings/OperationsStrings.iml

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+<?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>

lab3/OperationsStrings/src/Main.java

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+import java.util.HashSet;
+
+public class Main {
+
+    public static void main(String[] args) {
+        String inputText = "Who are you? What is your name? Where are you from?";
+        int targetLength = 3;
+
+        try {
+            HashSet<String> uniqueWords = new HashSet<String>();
+            String[] sentences = inputText.split("[?]");
+            for (String sentence : sentences) {
+                String[] words = sentence.trim().split("\\s+");
+                for (String word : words) {
+                    if (word.length() == targetLength) {
+                        uniqueWords.add(word.toLowerCase());
+                    }
+                }
+            }
+            System.out.println("Unique words of length " + targetLength + " in the input text are: " + uniqueWords);
+        } catch (Exception e) {
+            System.out.println("An error occurred: " + e.getMessage());
+        }
+    }
+}

lab3/lab3.iml

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+<?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://$MODULE_DIR$/OperationsStrings/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

lab4/EducationalInstitution/.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

lab4/EducationalInstitution/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_19" default="true" project-jdk-name="openjdk-19" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

lab4/EducationalInstitution/.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/EducationalInstitution.iml" filepath="$PROJECT_DIR$/EducationalInstitution.iml" />
+    </modules>
+  </component>
+</project>

lab4/EducationalInstitution/EducationalInstitution.iml

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+<?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>

lab4/untitled/.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

lab4/untitled/.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_19" default="true" project-jdk-name="openjdk-19" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

lab4/untitled/.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/untitled.iml" filepath="$PROJECT_DIR$/untitled.iml" />
+    </modules>
+  </component>
+</project>

lab4/untitled/src/Main.java

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+import java.util.*;
+
+public class Main {
+    public static void main(String[] args) {
+        List<SeaShip> ships = createList();
+
+        printList(ships);
+
+        ships = sortList(ships);
+
+        System.out.println("==============================");
+
+        printList(ships);
+    }
+
+    private static ArrayList<SeaShip> createList() {
+        ArrayList<SeaShip> ships = new ArrayList<>();
+        Random random = new Random();
+
+        for (int i = 0; i < 10; i++)
+            ships.add(new SeaShip("name" + (i + 1), "class" + (i + 1), "type" + (i + 1),
+                    random.nextInt(10000) + 1000, random.nextDouble() * 100 + 20,
+                    random.nextInt(10000) + 1000, random.nextDouble() * 100));
+
+//        ships.add(new SeaShip("nameA", "classA", "typeA",
+//                random.nextInt(10000) + 1000, 100d,
+//                random.nextInt(10000) + 1000, 120d));
+//        ships.add(new SeaShip("nameA", "classA", "typeA",
+//                random.nextInt(10000) + 1000, 100d,
+//                random.nextInt(10000) + 1000, 130d));
+//        ships.add(new SeaShip("nameA", "classA", "typeA",
+//                random.nextInt(10000) + 1000, 100d,
+//                random.nextInt(10000) + 1000, 140d));
+//        ships.add(new SeaShip("nameA", "classA", "typeA",
+//                random.nextInt(10000) + 1000, 120d,
+//                random.nextInt(10000) + 1000, 120d));
+//        ships.add(new SeaShip("nameA", "classA", "typeA",
+//                random.nextInt(10000) + 1000, 120d,
+//                random.nextInt(10000) + 1000, 100d));
+
+        return ships;
+    }
+
+    private static List<SeaShip> sortList(List<SeaShip> list) {
+        Comparator<SeaShip> comparator = Comparator.comparing(SeaShip::getLength).reversed()
+                .thenComparing(SeaShip::getMaxSpeed);
+
+        list.sort(comparator);
+
+        return list;
+    }
+
+    private static void printList(List<SeaShip> list) {
+        list.forEach(System.out::println);
+    }
+}

lab4/untitled/src/SeaShip.java

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+
+public class SeaShip {
+    private String name;
+    private String shipClass;
+    private String type;
+    private Integer weight;
+    private Double length;
+    private Integer power;
+    private Double maxSpeed;
+
+    public SeaShip(String name, String shipClass, String type,
+                   Integer weight, Double length, Integer power, Double maxSpeed) {
+        this.name = name;
+        this.shipClass = shipClass;
+        this.type = type;
+        this.weight = weight;
+        this.length = length;
+        this.power = power;
+        this.maxSpeed = maxSpeed;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getShipClass() {
+        return shipClass;
+    }
+
+    public void setShipClass(String shipClass) {
+        this.shipClass = shipClass;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    public Integer getWeight() {
+        return weight;
+    }
+
+    public void setWeight(Integer weight) {
+        this.weight = weight;
+    }
+
+    public Double getLength() {
+        return length;
+    }
+
+    public void setLength(Double length) {
+        this.length = length;
+    }
+
+    public Integer getPower() {
+        return power;
+    }
+
+    public void setPower(Integer power) {
+        this.power = power;
+    }
+
+    public Double getMaxSpeed() {
+        return maxSpeed;
+    }
+
+    public void setMaxSpeed(Double maxSpeed) {
+        this.maxSpeed = maxSpeed;
+    }
+
+    @Override
+    public String toString() {
+        return "Sea ship '" + name + "', class: " + shipClass + ", type: " + type + ".\n" +
+                "Weight: " + weight + "\n" +
+                "Length: " + length + "\n" +
+                "Engine power: " + power + "\n" +
+                "Max speed: " + maxSpeed + "\n";
+    }
+}

lab4/untitled/untitled.iml

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+<?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>