Merge branch 'feature/ui' into develop

app/pom.xml

@@ -41,6 +41,13 @@
       <artifactId>junit-jupiter-params</artifactId>
       <scope>test</scope>
     </dependency>
+
+    <dependency>
+      <groupId>com.googlecode.lanterna</groupId>
+      <artifactId>lanterna</artifactId>
+      <version>3.1.5</version>
+    </dependency>
+
   </dependencies>
 
   <build>
@@ -91,5 +98,18 @@
         </plugin>
       </plugins>
     </pluginManagement>
+
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>exec-maven-plugin</artifactId>
+        <version>3.6.3</version>
+
+        <configuration>
+          <mainClass>ru.project.App</mainClass>
+        </configuration>
+      </plugin>
+    </plugins>
+
   </build>
 </project>

app/src/main/java/ru/project/App.java

@@ -1,10 +1,45 @@
 package ru.project;
 
-/**
- * Hello world!
- */
-public class App {
-    public static void main(String[] args) {
-        System.out.println("Hello World!");
+import com.googlecode.lanterna.gui2.MultiWindowTextGUI;
+import com.googlecode.lanterna.screen.Screen;
+import com.googlecode.lanterna.terminal.DefaultTerminalFactory;
+import ru.project.model.AppState;
+import ru.project.ui.main.MainMenu;
+
+public final class App {
+
+  private App() {}
+
+  public static void main(String[] args) {
+    Screen screen = null;
+
+    try {
+      DefaultTerminalFactory terminalFactory = new DefaultTerminalFactory();
+
+      screen = terminalFactory.createScreen();
+      screen.startScreen();
+
+      MultiWindowTextGUI gui = new MultiWindowTextGUI(screen);
+
+      AppState state = new AppState();
+
+      MainMenu mainMenu = new MainMenu(gui, state);
+
+      mainMenu.showModal();
+
+    } catch (Exception e) {
+      System.err.println("Произошла ошибка при выполнении программы:");
+      e.printStackTrace();
+
+    } finally {
+      if (screen != null) {
+        try {
+          screen.stopScreen();
+        } catch (Exception e) {
+          System.err.println("Не удалось корректно завершить работу терминала:");
+          e.printStackTrace();
+        }
+      }
     }
+  }
 }

app/src/main/java/ru/project/collection/MyLinkedList.java

@@ -0,0 +1,120 @@
+package ru.project.collection;
+
+import java.util.Arrays;
+
+public class MyLinkedList<T> implements MyList<T> {
+  private Node<T> head;
+  private int size;
+
+  public void add(T value) {
+    if (head == null) {
+      this.head = new Node<>(value);
+    } else {
+      Node<T> temp = head;
+      while (temp.getNext() != null) {
+        temp = temp.getNext();
+      }
+      temp.setNext(new Node<>(value));
+    }
+    size++;
+  }
+
+  public T get(int index) {
+    int currentIndex = 0;
+    Node<T> temp = head;
+    while (temp != null) {
+      if (currentIndex == index) {
+        return temp.getValue();
+
+      } else {
+        temp = temp.getNext();
+        currentIndex++;
+      }
+    }
+    throw new IllegalArgumentException();
+  }
+
+  public void remove(int index) {
+    if (index < 0 || index >= size) {
+      throw new IndexOutOfBoundsException();
+    }
+    if (index == 0) {
+      head = head.getNext();
+      size--;
+      return;
+    }
+    int currentIndex = 0;
+    Node<T> temp = head;
+    while (temp != null) {
+      if (currentIndex == index - 1) {
+        temp.setNext(temp.getNext().getNext());
+        size--;
+        return;
+      } else {
+        temp = temp.getNext();
+        currentIndex++;
+      }
+    }
+  }
+
+  public T set(int index, T value) {
+    if (index < 0 || index >= size) {
+      throw new IllegalArgumentException();
+    }
+
+    Node<T> temp = head;
+    for (int i = 0; i < index; i++) {
+      temp = temp.getNext();
+    }
+
+    T oldValue = temp.getValue();
+    temp.setValue(value);
+    return oldValue;
+  }
+
+  public int size() {
+    return size;
+  }
+
+  public boolean isEmpty() {
+    return size == 0;
+  }
+
+  @Override
+  public String toString() {
+    Object[] res = new Object[size];
+    int index = 0;
+    Node<T> temp = head;
+    while (temp != null) {
+      res[index] = temp.getValue();
+      index++;
+      temp = temp.getNext();
+    }
+    return Arrays.toString(res);
+  }
+
+  private static class Node<T> {
+    private T value;
+    private Node<T> next;
+
+    public Node(T value) {
+      this.value = value;
+    }
+
+    public void setValue(T value) {
+      this.value = value;
+    }
+
+    public void setNext(Node<T> next) {
+      this.next = next;
+    }
+
+    public T getValue() {
+      return value;
+    }
+
+    public Node<T> getNext() {
+      return next;
+    }
+  }
+}

app/src/main/java/ru/project/collection/MyList.java

@@ -0,0 +1,16 @@
+package ru.project.collection;
+
+public interface MyList<T> {
+
+  void add(T element);
+
+  T get(int index);
+
+  T set(int index, T element);
+
+  void remove(int index);
+
+  int size();
+
+  boolean isEmpty();
+}

app/src/main/java/ru/project/model/AppState.java

@@ -0,0 +1,43 @@
+package ru.project.model;
+
+import ru.project.collection.MyLinkedList;
+import ru.project.collection.MyList;
+import ru.project.student.Student;
+
+public class AppState {
+
+  private MyList<Student> mainCollection;
+  private MyList<Student> customDataCollection;
+  private String currentFilePath;
+
+  public AppState() {
+    this.mainCollection = new MyLinkedList<>();
+    this.customDataCollection = new MyLinkedList<>();
+    this.currentFilePath = null;
+  }
+
+  public MyList<Student> getMainCollection() {
+    return mainCollection;
+  }
+
+  public void setMainCollection(MyList<Student> currentCollection) {
+    this.mainCollection = currentCollection;
+  }
+
+  public MyList<Student> getCustomDataCollection() {
+    return customDataCollection;
+  }
+
+  public void setCustomDataCollection(MyList<Student> customDataCollection) {
+
+    this.customDataCollection = customDataCollection;
+  }
+
+  public String getCurrentFilePath() {
+    return currentFilePath;
+  }
+
+  public void setCurrentFilePath(String currentFilePath) {
+    this.currentFilePath = currentFilePath;
+  }
+}

app/src/main/java/ru/project/sorting/BubbleSortStrategy.java

@@ -0,0 +1,24 @@
+package ru.project.sorting;
+
+import java.util.Comparator;
+import ru.project.collection.MyList;
+
+public class BubbleSortStrategy<T> implements SortStrategy<T> {
+
+  @Override
+  public void sort(MyList<T> list, Comparator<T> comparator) {
+    if (list == null || list.size() <= 1) {
+      return;
+    }
+    int n = list.size();
+    for (int i = 0; i < n - 1; i++) {
+      for (int j = 0; j < n - i - 1; j++) {
+        if (comparator.compare(list.get(j), list.get(j + 1)) > 0) {
+          T temp = list.get(j);
+          list.set(j, list.get(j + 1));
+          list.set(j + 1, temp);
+        }
+      }
+    }
+  }
+}

app/src/main/java/ru/project/sorting/EvenOnlyMergeSortStrategy.java

@@ -0,0 +1,84 @@
+package ru.project.sorting;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+import java.util.function.ToIntFunction;
+import ru.project.collection.MyList;
+
+public class EvenOnlyMergeSortStrategy<T> implements SortStrategy<T> {
+
+  private final ToIntFunction<T> valueExtractor;
+
+  public EvenOnlyMergeSortStrategy(ToIntFunction<T> valueExtractor) {
+    this.valueExtractor = valueExtractor;
+  }
+
+  @Override
+  public void sort(MyList<T> list, Comparator<T> comparator) {
+    if (list == null || list.size() <= 1) {
+      return;
+    }
+
+    List<Integer> evenIndices = new ArrayList<>();
+    List<T> evenElements = new ArrayList<>();
+
+    for (int i = 0; i < list.size(); i++) {
+      T element = list.get(i);
+      int value = valueExtractor.applyAsInt(element);
+      if (value % 2 == 0) {
+        evenIndices.add(i);
+        evenElements.add(element);
+      }
+    }
+
+    if (evenElements.size() <= 1) {
+      return;
+    }
+
+    List<T> sortedEven = mergeSort(evenElements, comparator);
+
+    for (int j = 0; j < evenIndices.size(); j++) {
+      list.set(evenIndices.get(j), sortedEven.get(j));
+    }
+  }
+
+  private List<T> mergeSort(List<T> list, Comparator<T> comparator) {
+    if (list.size() <= 1) {
+      return list;
+    }
+
+    int mid = list.size() / 2;
+    List<T> left = mergeSort(list.subList(0, mid), comparator);
+    List<T> right = mergeSort(list.subList(mid, list.size()), comparator);
+
+    return merge(left, right, comparator);
+  }
+
+  private List<T> merge(List<T> left, List<T> right, Comparator<T> comparator) {
+    List<T> result = new ArrayList<>();
+    int i = 0, j = 0;
+
+    while (i < left.size() && j < right.size()) {
+      if (comparator.compare(left.get(i), right.get(j)) <= 0) {
+        result.add(left.get(i));
+        i++;
+      } else {
+        result.add(right.get(j));
+        j++;
+      }
+    }
+
+    while (i < left.size()) {
+      result.add(left.get(i));
+      i++;
+    }
+
+    while (j < right.size()) {
+      result.add(right.get(j));
+      j++;
+    }
+
+    return result;
+  }
+}

app/src/main/java/ru/project/sorting/EvenOnlySortStrategy.java

@@ -0,0 +1,89 @@
+package ru.project.sorting;
+
+import java.util.Comparator;
+import java.util.function.ToIntFunction;
+import ru.project.collection.MyLinkedList;
+import ru.project.collection.MyList;
+
+public class EvenOnlySortStrategy<T> implements SortStrategy<T> {
+
+  private SortStrategy<T> sortStrategy;
+  private ToIntFunction<T> valueExtractor;
+
+  public EvenOnlySortStrategy() {}
+
+  public EvenOnlySortStrategy(SortStrategy<T> sortStrategy) {
+    setSortStrategy(sortStrategy);
+  }
+
+  public EvenOnlySortStrategy(SortStrategy<T> sortStrategy, ToIntFunction<T> valueExtractor) {
+    setSortStrategy(sortStrategy);
+    setValueExtractor(valueExtractor);
+  }
+
+  public void setSortStrategy(SortStrategy<T> sortStrategy) {
+    if (sortStrategy == null) {
+      throw new IllegalArgumentException("Sort strategy must not be null");
+    }
+
+    this.sortStrategy = sortStrategy;
+  }
+
+  public void setValueExtractor(ToIntFunction<T> valueExtractor) {
+    if (valueExtractor == null) {
+      throw new IllegalArgumentException("Value extractor must not be null");
+    }
+
+    this.valueExtractor = valueExtractor;
+  }
+
+  @Override
+  public void sort(MyList<T> list, Comparator<T> comparator) {
+    if (sortStrategy == null) {
+      throw new IllegalStateException("Sort strategy is not set");
+    }
+
+    if (valueExtractor == null) {
+      throw new IllegalStateException("Value extractor is not set");
+    }
+
+    if (list == null || list.size() <= 1) {
+      return;
+    }
+
+    int evenCount = 0;
+
+    for (int i = 0; i < list.size(); i++) {
+      T element = list.get(i);
+
+      if (valueExtractor.applyAsInt(element) % 2 == 0) {
+        evenCount++;
+      }
+    }
+
+    if (evenCount <= 1) {
+      return;
+    }
+
+    MyList<T> evenElements = new MyLinkedList<>();
+    int[] evenIndexes = new int[evenCount];
+
+    int evenIndex = 0;
+
+    for (int i = 0; i < list.size(); i++) {
+      T element = list.get(i);
+
+      if (valueExtractor.applyAsInt(element) % 2 == 0) {
+        evenElements.add(element);
+        evenIndexes[evenIndex] = i;
+        evenIndex++;
+      }
+    }
+
+    sortStrategy.sort(evenElements, comparator);
+
+    for (int i = 0; i < evenIndexes.length; i++) {
+      list.set(evenIndexes[i], evenElements.get(i));
+    }
+  }
+}

app/src/main/java/ru/project/sorting/MergeSortStrategy.java

@@ -0,0 +1,66 @@
+package ru.project.sorting;
+
+import java.util.Comparator;
+import ru.project.collection.MyList;
+
+public class MergeSortStrategy<T> implements SortStrategy<T> {
+
+  @Override
+  public void sort(MyList<T> list, Comparator<T> comparator) {
+    if (list == null || list.size() <= 1) {
+      return;
+    }
+    mergeSort(list, 0, list.size() - 1, comparator);
+  }
+
+  private void mergeSort(MyList<T> list, int left, int right, Comparator<T> comparator) {
+    if (left >= right) {
+      return;
+    }
+    int mid = (left + right) / 2;
+    mergeSort(list, left, mid, comparator);
+    mergeSort(list, mid + 1, right, comparator);
+    merge(list, left, mid, right, comparator);
+  }
+
+  private void merge(MyList<T> list, int left, int mid, int right, Comparator<T> comparator) {
+    int leftSize = mid - left + 1;
+    int rightSize = right - mid;
+
+    @SuppressWarnings("unchecked")
+    T[] leftArray = (T[]) new Object[leftSize];
+    @SuppressWarnings("unchecked")
+    T[] rightArray = (T[]) new Object[rightSize];
+
+    for (int i = 0; i < leftSize; i++) {
+      leftArray[i] = list.get(left + i);
+    }
+    for (int j = 0; j < rightSize; j++) {
+      rightArray[j] = list.get(mid + 1 + j);
+    }
+
+    int i = 0, j = 0, k = left;
+
+    while (i < leftSize && j < rightSize) {
+      if (comparator.compare(leftArray[i], rightArray[j]) <= 0) {
+        list.set(k, leftArray[i]);
+        i++;
+      } else {
+        list.set(k, rightArray[j]);
+        j++;
+      }
+      k++;
+    }
+
+    while (i < leftSize) {
+      list.set(k, leftArray[i]);
+      i++;
+      k++;
+    }
+    while (j < rightSize) {
+      list.set(k, rightArray[j]);
+      j++;
+      k++;
+    }
+  }
+}

app/src/main/java/ru/project/sorting/SortStrategy.java

@@ -0,0 +1,8 @@
+package ru.project.sorting;
+
+import java.util.Comparator;
+import ru.project.collection.MyList;
+
+public interface SortStrategy<T> {
+  void sort(MyList<T> list, Comparator<T> comparator);
+}

app/src/main/java/ru/project/sorting/StudentAverageGradeComparator.java

@@ -0,0 +1,12 @@
+package ru.project.sorting;
+
+import java.util.Comparator;
+import ru.project.student.Student;
+
+public class StudentAverageGradeComparator implements Comparator<Student> {
+
+  @Override
+  public int compare(Student s1, Student s2) {
+    return Double.compare(s1.getAverageGrade(), s2.getAverageGrade());
+  }
+}

app/src/main/java/ru/project/sorting/StudentGroupComparator.java

@@ -0,0 +1,12 @@
+package ru.project.sorting;
+
+import java.util.Comparator;
+import ru.project.student.Student;
+
+public class StudentGroupComparator implements Comparator<Student> {
+
+  @Override
+  public int compare(Student s1, Student s2) {
+    return s1.getGroupNumber().compareTo(s2.getGroupNumber());
+  }
+}

app/src/main/java/ru/project/sorting/StudentRecordBookComparator.java

@@ -0,0 +1,12 @@
+package ru.project.sorting;
+
+import java.util.Comparator;
+import ru.project.student.Student;
+
+public class StudentRecordBookComparator implements Comparator<Student> {
+
+  @Override
+  public int compare(Student s1, Student s2) {
+    return Integer.compare(s1.getRecordBookNumber(), s2.getRecordBookNumber());
+  }
+}

app/src/main/java/ru/project/student/Student.java

@@ -0,0 +1,111 @@
+package ru.project.student;
+
+import java.util.Objects;
+
+public class Student {
+
+  public static final double MIN_AVERAGE_GRADE = 0.0;
+  public static final double MAX_AVERAGE_GRADE = 5.0;
+  public static final int MIN_RECORD_BOOK_NUMBER = 1;
+  public static final String GROUP_NUMBER_PATTERN = "^[A-Z][0-9]{2}$";
+
+  private final String groupNumber;
+  private final double averageGrade;
+  private final int recordBookNumber;
+
+  public Student(String groupNumber, double averageGrade, int recordBookNumber) {
+    if (groupNumber == null || !groupNumber.matches(GROUP_NUMBER_PATTERN)) {
+      throw new IllegalArgumentException(
+          "Group number must match pattern: " + GROUP_NUMBER_PATTERN);
+    }
+    if (averageGrade < MIN_AVERAGE_GRADE || averageGrade > MAX_AVERAGE_GRADE) {
+      throw new IllegalArgumentException(
+          "Average grade must be between " + MIN_AVERAGE_GRADE + " and " + MAX_AVERAGE_GRADE);
+    }
+    if (recordBookNumber <= 0) {
+      throw new IllegalArgumentException("Record book number must be positive");
+    }
+    if (recordBookNumber < MIN_RECORD_BOOK_NUMBER) {
+      throw new IllegalArgumentException(
+          "Record book number must be at least " + MIN_RECORD_BOOK_NUMBER);
+    }
+    this.groupNumber = groupNumber;
+    this.averageGrade = averageGrade;
+    this.recordBookNumber = recordBookNumber;
+  }
+
+  public String getGroupNumber() {
+    return groupNumber;
+  }
+
+  public double getAverageGrade() {
+    return averageGrade;
+  }
+
+  public int getRecordBookNumber() {
+    return recordBookNumber;
+  }
+
+  public Student withGroupNumber(String groupNumber) {
+    return new Student(groupNumber, this.averageGrade, this.recordBookNumber);
+  }
+
+  public Student withAverageGrade(double averageGrade) {
+    return new Student(this.groupNumber, averageGrade, this.recordBookNumber);
+  }
+
+  public Student withRecordBookNumber(int recordBookNumber) {
+    return new Student(this.groupNumber, this.averageGrade, recordBookNumber);
+  }
+
+  public static double getMinAverageGrade() {
+    return MIN_AVERAGE_GRADE;
+  }
+
+  public static double getMaxAverageGrade() {
+    return MAX_AVERAGE_GRADE;
+  }
+
+  public static int getMinRecordBookNumber() {
+    return MIN_RECORD_BOOK_NUMBER;
+  }
+
+  public static String getGroupNumberPattern() {
+    return GROUP_NUMBER_PATTERN;
+  }
+
+  public String toString() {
+    return "Student{"
+        + "groupNumber='"
+        + groupNumber
+        + '\''
+        + ", averageGrade="
+        + averageGrade
+        + ", recordBookNumber="
+        + recordBookNumber
+        + '}';
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(groupNumber, averageGrade, recordBookNumber);
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (this == obj) {
+      return true;
+    }
+    if (obj == null || getClass() != obj.getClass()) {
+      return false;
+    }
+    if (this.hashCode() != obj.hashCode()) {
+      return false;
+    }
+
+    Student student = (Student) obj;
+    return Double.compare(averageGrade, student.averageGrade) == 0
+        && recordBookNumber == student.recordBookNumber
+        && Objects.equals(groupNumber, student.groupNumber);
+  }
+}

app/src/main/java/ru/project/student/StudentBuilder.java

@@ -0,0 +1,26 @@
+package ru.project.student;
+
+public class StudentBuilder {
+  private String groupNumber;
+  private double averageGrade;
+  private int recordBookNumber;
+
+  public StudentBuilder setGroupNumber(String groupNumber) {
+    this.groupNumber = groupNumber;
+    return this;
+  }
+
+  public StudentBuilder setAverageGrade(double averageGrade) {
+    this.averageGrade = averageGrade;
+    return this;
+  }
+
+  public StudentBuilder setRecordBookNumber(int recordBookNumber) {
+    this.recordBookNumber = recordBookNumber;
+    return this;
+  }
+
+  public Student build() {
+    return new Student(groupNumber, averageGrade, recordBookNumber);
+  }
+}

app/src/main/java/ru/project/ui/base/BaseModalWindow.java

@@ -0,0 +1,19 @@
+package ru.project.ui.base;
+
+import com.googlecode.lanterna.gui2.BasicWindow;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+
+public abstract class BaseModalWindow extends BasicWindow {
+
+  protected final WindowBasedTextGUI gui;
+
+  protected BaseModalWindow(String title, WindowBasedTextGUI gui) {
+    super(title);
+
+    this.gui = gui;
+  }
+
+  public void showModal() {
+    gui.addWindowAndWait(this);
+  }
+}

app/src/main/java/ru/project/ui/common/CollectionDisplayWindow.java

@@ -0,0 +1,102 @@
+package ru.project.ui.common;
+
+import com.googlecode.lanterna.TerminalSize;
+import com.googlecode.lanterna.gui2.Button;
+import com.googlecode.lanterna.gui2.Direction;
+import com.googlecode.lanterna.gui2.EmptySpace;
+import com.googlecode.lanterna.gui2.LinearLayout;
+import com.googlecode.lanterna.gui2.Panel;
+import com.googlecode.lanterna.gui2.TextBox;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import com.googlecode.lanterna.input.KeyStroke;
+import com.googlecode.lanterna.input.KeyType;
+import ru.project.collection.MyList;
+import ru.project.student.Student;
+import ru.project.ui.base.BaseModalWindow;
+
+public class CollectionDisplayWindow extends BaseModalWindow {
+
+  private final MyList<Student> collection;
+
+  private TextBox collectionTextBox;
+  private Button exitButton;
+
+  public CollectionDisplayWindow(WindowBasedTextGUI gui, MyList<Student> collection) {
+
+    super("Просмотр коллекции", gui);
+
+    this.collection = collection;
+
+    Panel panel = createPanel();
+
+    setComponent(panel);
+
+    exitButton.takeFocus();
+  }
+
+  @Override
+  public boolean handleInput(KeyStroke key) {
+    if (key.getKeyType() == KeyType.Escape && collectionTextBox.isFocused()) {
+
+      exitButton.takeFocus();
+      return true;
+    }
+
+    return super.handleInput(key);
+  }
+
+  private Panel createPanel() {
+    Panel panel = new Panel();
+
+    panel.setLayoutManager(new LinearLayout(Direction.VERTICAL));
+
+    addCollectionDisplay(panel);
+    addExitButton(panel);
+
+    return panel;
+  }
+
+  private void addCollectionDisplay(Panel panel) {
+    collectionTextBox = createCollectionScrollBox();
+
+    panel.addComponent(collectionTextBox);
+  }
+
+  private TextBox createCollectionScrollBox() {
+    TextBox textBox = new TextBox(new TerminalSize(80, 20), TextBox.Style.MULTI_LINE);
+
+    textBox.setReadOnly(true);
+
+    if (collection == null || collection.isEmpty()) {
+      textBox.setText("Коллекция пуста.");
+    } else {
+      textBox.setText(buildCollectionText());
+    }
+
+    return textBox;
+  }
+
+  private void addExitButton(Panel panel) {
+    panel.addComponent(new EmptySpace(new TerminalSize(0, 1)));
+
+    exitButton = new Button("Выйти", this::close);
+
+    panel.addComponent(exitButton);
+  }
+
+  private String buildCollectionText() {
+    StringBuilder text = new StringBuilder();
+
+    for (int i = 0; i < collection.size(); i++) {
+      Student student = collection.get(i);
+
+      text.append("[")
+          .append(i)
+          .append("] ")
+          .append(student == null ? "null" : student)
+          .append("\n");
+    }
+
+    return text.toString();
+  }
+}

app/src/main/java/ru/project/ui/common/InputValueWindow.java

@@ -0,0 +1,56 @@
+package ru.project.ui.common;
+
+import com.googlecode.lanterna.gui2.Button;
+import com.googlecode.lanterna.gui2.Label;
+import com.googlecode.lanterna.gui2.LinearLayout;
+import com.googlecode.lanterna.gui2.Panel;
+import com.googlecode.lanterna.gui2.TextBox;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import java.util.function.Predicate;
+import ru.project.ui.base.BaseModalWindow;
+
+public class InputValueWindow extends BaseModalWindow {
+
+  private final TextBox textBox;
+  private final Predicate<String> onSave;
+
+  public InputValueWindow(
+      WindowBasedTextGUI gui,
+      String title,
+      String prompt,
+      String initialValue,
+      Predicate<String> onSave) {
+
+    super(title, gui);
+
+    this.onSave = onSave;
+
+    Panel panel = new Panel();
+    panel.setLayoutManager(new LinearLayout());
+
+    panel.addComponent(new Label(prompt));
+
+    textBox = new TextBox(initialValue == null ? "" : initialValue);
+
+    panel.addComponent(textBox);
+
+    panel.addComponent(new Button("Сохранить", this::save));
+
+    panel.addComponent(new Button("Отмена", this::close));
+
+    setComponent(panel);
+  }
+
+  private void save() {
+    String value = textBox.getText().trim();
+
+    if (value.isEmpty()) {
+      MessageWindow.showModal(gui, "Значение не может быть пустым.");
+      return;
+    }
+
+    if (onSave.test(value)) {
+      close();
+    }
+  }
+}

app/src/main/java/ru/project/ui/common/MessageWindow.java

@@ -0,0 +1,28 @@
+package ru.project.ui.common;
+
+import com.googlecode.lanterna.gui2.Button;
+import com.googlecode.lanterna.gui2.Label;
+import com.googlecode.lanterna.gui2.LinearLayout;
+import com.googlecode.lanterna.gui2.Panel;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import ru.project.ui.base.BaseModalWindow;
+
+public class MessageWindow extends BaseModalWindow {
+
+  public MessageWindow(WindowBasedTextGUI gui, String message) {
+    super("Информация", gui);
+
+    Panel panel = new Panel();
+    panel.setLayoutManager(new LinearLayout());
+
+    panel.addComponent(new Label(message));
+
+    panel.addComponent(new Button("OK", this::close));
+
+    setComponent(panel);
+  }
+
+  public static void showModal(WindowBasedTextGUI gui, String message) {
+    new MessageWindow(gui, message).showModal();
+  }
+}

app/src/main/java/ru/project/ui/creation/CreateCollectionMenu.java

@@ -0,0 +1,169 @@
+package ru.project.ui.creation;
+
+import com.googlecode.lanterna.gui2.Button;
+import com.googlecode.lanterna.gui2.Label;
+import com.googlecode.lanterna.gui2.LinearLayout;
+import com.googlecode.lanterna.gui2.Panel;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import ru.project.collection.MyLinkedList;
+import ru.project.collection.MyList;
+import ru.project.model.AppState;
+import ru.project.student.Student;
+import ru.project.ui.base.BaseModalWindow;
+import ru.project.ui.common.InputValueWindow;
+import ru.project.ui.common.MessageWindow;
+
+public class CreateCollectionMenu extends BaseModalWindow {
+
+  private int collectionSize;
+  private FillMethod selectedFillMethod;
+
+  private final Label sizeLabel;
+  private final Label fillMethodLabel;
+
+  private final CustomDataSettingsWindow customDataSettingsWindow;
+
+  public CreateCollectionMenu(WindowBasedTextGUI gui, AppState state) {
+    super("Создание новой коллекции", gui);
+
+    collectionSize = 0;
+    selectedFillMethod = FillMethod.CUSTOM;
+
+    customDataSettingsWindow = new CustomDataSettingsWindow(gui, state, () -> collectionSize);
+
+    Panel panel = new Panel();
+    panel.setLayoutManager(new LinearLayout());
+
+    sizeLabel = new Label("Размер: не задан");
+
+    fillMethodLabel = new Label("Способ заполнения: " + getFillMethodName(selectedFillMethod));
+
+    panel.addComponent(sizeLabel);
+    panel.addComponent(fillMethodLabel);
+
+    panel.addComponent(new Button("Задать размер", this::showCollectionSizeInputValueWindow));
+
+    panel.addComponent(new Button("Выбрать способ заполнения", this::selectFillMethod));
+
+    panel.addComponent(
+        new Button("Настроить текущий способ заполнения", this::setupCurrentFillMethod));
+
+    panel.addComponent(new Button("Создать новую коллекцию", () -> updateMainCollection(state)));
+
+    panel.addComponent(new Button("Выйти", this::close));
+
+    setComponent(panel);
+  }
+
+  private void showCollectionSizeInputValueWindow() {
+    InputValueWindow window =
+        new InputValueWindow(
+            gui,
+            "Размер коллекции",
+            "Введите размер коллекции:",
+            collectionSize > 0 ? String.valueOf(collectionSize) : null,
+            this::handleSizeEntered);
+
+    window.showModal();
+  }
+
+  private boolean handleSizeEntered(String value) {
+    try {
+      int enteredSize = Integer.parseInt(value);
+      if (enteredSize <= 0) {
+        MessageWindow.showModal(gui, "Размер должен быть больше 0.");
+        return false;
+      }
+      collectionSize = enteredSize;
+      sizeLabel.setText("Размер: " + collectionSize);
+      return true;
+    } catch (NumberFormatException e) {
+      MessageWindow.showModal(gui, "Введите целое число.");
+      return false;
+    }
+  }
+
+  private void setupCurrentFillMethod() {
+    switch (selectedFillMethod) {
+      case CUSTOM -> {
+        customDataSettingsWindow.showModal();
+      }
+
+      case FILE ->
+          // TODO
+          MessageWindow.showModal(gui, "Не реализовано.");
+
+      case RANDOM ->
+          MessageWindow.showModal(
+              gui, "Для случайных данных дополнительные настройки не требуются.");
+    }
+  }
+
+  private void selectFillMethod() {
+    BaseModalWindow menu =
+        new FillMethodSelectionWindow(
+            gui,
+            fillMethod -> {
+              selectedFillMethod = fillMethod;
+              fillMethodLabel.setText(
+                  "Способ заполнения: " + getFillMethodName(selectedFillMethod));
+            });
+
+    menu.showModal();
+  }
+
+  private void updateMainCollection(AppState state) {
+    if (collectionSize <= 0) {
+      MessageWindow.showModal(gui, "Сначала задайте размер коллекции.");
+      return;
+    }
+
+    switch (selectedFillMethod) {
+      case CUSTOM:
+        createCollectionFromCustomData(state);
+        break;
+
+      case RANDOM:
+        createCollectionFromRandomData(state);
+        break;
+
+      case FILE:
+        createCollectionFromFileData(state);
+        break;
+    }
+  }
+
+  private void createCollectionFromCustomData(AppState state) {
+    MyList<Student> customDataCollection = state.getCustomDataCollection();
+
+    MyList<Student> mainCollection = new MyLinkedList<>();
+
+    for (int i = 0; i < customDataCollection.size(); i++) {
+      mainCollection.add(customDataCollection.get(i));
+    }
+
+    state.setMainCollection(mainCollection);
+
+    MessageWindow.showModal(gui, "Коллекция успешно создана.");
+  }
+
+  private void createCollectionFromRandomData(AppState state) {
+    // TODO
+    MessageWindow.showModal(gui, "Не реализовано.");
+  }
+
+  private void createCollectionFromFileData(AppState state) {
+    // TODO
+    MessageWindow.showModal(gui, "Не реализовано.");
+  }
+
+  private String getFillMethodName(FillMethod fillMethod) {
+    return switch (fillMethod) {
+      case CUSTOM -> "Пользовательские данные";
+
+      case RANDOM -> "Случайные данные";
+
+      case FILE -> "Данные из файла";
+    };
+  }
+}

app/src/main/java/ru/project/ui/creation/CustomDataSettingsWindow.java

@@ -0,0 +1,289 @@
+package ru.project.ui.creation;
+
+import com.googlecode.lanterna.gui2.Button;
+import com.googlecode.lanterna.gui2.Label;
+import com.googlecode.lanterna.gui2.LinearLayout;
+import com.googlecode.lanterna.gui2.Panel;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import java.util.function.Supplier;
+import ru.project.collection.MyLinkedList;
+import ru.project.collection.MyList;
+import ru.project.model.AppState;
+import ru.project.student.Student;
+import ru.project.student.StudentBuilder;
+import ru.project.ui.base.BaseModalWindow;
+import ru.project.ui.common.CollectionDisplayWindow;
+import ru.project.ui.common.InputValueWindow;
+import ru.project.ui.common.MessageWindow;
+
+public class CustomDataSettingsWindow extends BaseModalWindow {
+
+  private final AppState state;
+  private final Supplier<Integer> requestedCollectionSize;
+  private final StudentBuilder studentBuilder;
+
+  private String groupNumber;
+  private Double averageGrade;
+  private Integer recordBookNumber;
+  private Integer selectedObjectIndex;
+
+  private final Label groupNumberLabel;
+  private final Label averageGradeLabel;
+  private final Label recordBookNumberLabel;
+  private final Label indexLabel;
+
+  private MyList<Student> preparedCustomDataCollection;
+
+  public CustomDataSettingsWindow(
+      WindowBasedTextGUI gui, AppState state, Supplier<Integer> collectionSize) {
+
+    super("Настройка пользовательских данных", gui);
+
+    this.state = state;
+    this.requestedCollectionSize = collectionSize;
+
+    this.studentBuilder = new StudentBuilder();
+
+    Panel panel = new Panel();
+    panel.setLayoutManager(new LinearLayout());
+
+    groupNumberLabel = new Label("Номер группы: не задан");
+
+    averageGradeLabel = new Label("Средний балл: не задан");
+
+    recordBookNumberLabel = new Label("Номер зачётной книжки: не задан");
+
+    indexLabel = new Label("Индекс объекта: не задан");
+
+    panel.addComponent(groupNumberLabel);
+    panel.addComponent(averageGradeLabel);
+    panel.addComponent(recordBookNumberLabel);
+    panel.addComponent(indexLabel);
+
+    panel.addComponent(new Button("Задать номер группы", this::setGroupNumber));
+
+    panel.addComponent(new Button("Задать средний балл", this::setAverageGrade));
+
+    panel.addComponent(new Button("Задать номер зачётной книжки", this::setRecordBookNumber));
+
+    panel.addComponent(new Button("Задать индекс объекта", this::setObjectIndex));
+
+    panel.addComponent(new Button("Задать данные объекта", this::editObject));
+
+    panel.addComponent(new Button("Предпросмотр", this::preview));
+
+    panel.addComponent(new Button("Применить", this::apply));
+
+    panel.addComponent(new Button("Назад", this::close));
+
+    setComponent(panel);
+  }
+
+  @Override
+  public void showModal() {
+    prepareCustomDataCollection();
+    super.showModal();
+  }
+
+  private void prepareCustomDataCollection() {
+    preparedCustomDataCollection = new MyLinkedList<>();
+
+    int targetCollectionSize = requestedCollectionSize.get();
+    int currentCustomDataCollectionSize = state.getCustomDataCollection().size();
+
+    int elementsToCopy = Math.min(currentCustomDataCollectionSize, targetCollectionSize);
+
+    for (int i = 0; i < elementsToCopy; i++) {
+      preparedCustomDataCollection.add(state.getCustomDataCollection().get(i));
+    }
+
+    for (int i = elementsToCopy; i < targetCollectionSize; i++) {
+      preparedCustomDataCollection.add(null);
+    }
+  }
+
+  private void setGroupNumber() {
+    InputValueWindow window =
+        new InputValueWindow(
+            gui,
+            "Номер группы",
+            "Введите номер группы (например, A12):",
+            groupNumber,
+            value -> {
+              if (!value.matches(Student.getGroupNumberPattern())) {
+                MessageWindow.showModal(gui, "Номер группы должен соответствовать формату A12.");
+                return false;
+              }
+
+              groupNumber = value;
+              studentBuilder.setGroupNumber(value);
+
+              groupNumberLabel.setText("Номер группы: " + groupNumber);
+
+              return true;
+            });
+
+    window.showModal();
+  }
+
+  private void setAverageGrade() {
+    InputValueWindow window =
+        new InputValueWindow(
+            gui,
+            "Средний балл",
+            "Введите средний балл от 0.0 до 5.0:",
+            averageGrade == null ? null : String.valueOf(averageGrade),
+            value -> {
+              try {
+                double parsedValue = Double.parseDouble(value);
+
+                if (parsedValue < Student.getMinAverageGrade()
+                    || parsedValue > Student.getMaxAverageGrade()) {
+
+                  MessageWindow.showModal(gui, "Средний балл должен быть от 0.0 до 5.0.");
+
+                  return false;
+                }
+
+                averageGrade = parsedValue;
+
+                studentBuilder.setAverageGrade(parsedValue);
+
+                averageGradeLabel.setText("Средний балл: " + averageGrade);
+
+                return true;
+
+              } catch (NumberFormatException e) {
+                MessageWindow.showModal(gui, "Введите корректное число.");
+
+                return false;
+              }
+            });
+
+    window.showModal();
+  }
+
+  private void setRecordBookNumber() {
+    InputValueWindow window =
+        new InputValueWindow(
+            gui,
+            "Номер зачётной книжки",
+            "Введите номер зачётной книжки:",
+            recordBookNumber == null ? null : String.valueOf(recordBookNumber),
+            value -> {
+              try {
+                int parsedValue = Integer.parseInt(value);
+
+                if (parsedValue < Student.getMinRecordBookNumber()) {
+
+                  MessageWindow.showModal(gui, "Номер зачётной книжки должен быть положительным.");
+
+                  return false;
+                }
+
+                recordBookNumber = parsedValue;
+
+                studentBuilder.setRecordBookNumber(parsedValue);
+
+                recordBookNumberLabel.setText("Номер зачётной книжки: " + recordBookNumber);
+
+                return true;
+
+              } catch (NumberFormatException e) {
+                MessageWindow.showModal(gui, "Введите целое число.");
+
+                return false;
+              }
+            });
+
+    window.showModal();
+  }
+
+  private void setObjectIndex() {
+    InputValueWindow window =
+        new InputValueWindow(
+            gui,
+            "Индекс объекта",
+            "Введите индекс объекта:",
+            selectedObjectIndex == null ? null : String.valueOf(selectedObjectIndex),
+            value -> {
+              try {
+                int index = Integer.parseInt(value);
+
+                if (index < 0) {
+                  MessageWindow.showModal(gui, "Индекс объекта не может быть отрицательным.");
+
+                  return false;
+                }
+
+                int size = requestedCollectionSize.get();
+
+                if (index >= size) {
+                  MessageWindow.showModal(gui, "Индекс должен быть меньше размера коллекции.");
+
+                  return false;
+                }
+
+                selectedObjectIndex = index;
+
+                indexLabel.setText("Индекс объекта: " + selectedObjectIndex);
+
+                return true;
+
+              } catch (NumberFormatException e) {
+                MessageWindow.showModal(gui, "Введите целое число.");
+
+                return false;
+              }
+            });
+
+    window.showModal();
+  }
+
+  private void editObject() {
+    if (!hasStudentData()) {
+      MessageWindow.showModal(gui, "Сначала задайте все поля студента.");
+      return;
+    }
+
+    if (selectedObjectIndex == null) {
+      MessageWindow.showModal(gui, "Сначала задайте индекс объекта.");
+      return;
+    }
+
+    if (selectedObjectIndex >= preparedCustomDataCollection.size()) {
+      MessageWindow.showModal(gui, "Индекс объекта выходит за границы подготовленной коллекции.");
+      return;
+    }
+
+    Student student = studentBuilder.build();
+
+    preparedCustomDataCollection.set(selectedObjectIndex, student);
+
+    MessageWindow.showModal(gui, "Данные объекта успешно заданы.");
+  }
+
+  private void apply() {
+    state.setCustomDataCollection(preparedCustomDataCollection);
+    prepareCustomDataCollection();
+
+    MessageWindow.showModal(gui, "Пользовательские данные успешно применены.");
+  }
+
+  private void preview() {
+    if (preparedCustomDataCollection == null || preparedCustomDataCollection.isEmpty()) {
+
+      MessageWindow.showModal(gui, "Подготовленная коллекция пуста.");
+
+      return;
+    }
+
+    CollectionDisplayWindow window = new CollectionDisplayWindow(gui, preparedCustomDataCollection);
+
+    window.showModal();
+  }
+
+  private boolean hasStudentData() {
+    return groupNumber != null && averageGrade != null && recordBookNumber != null;
+  }
+}

app/src/main/java/ru/project/ui/creation/FillMethod.java

@@ -0,0 +1,7 @@
+package ru.project.ui.creation;
+
+public enum FillMethod {
+  CUSTOM,
+  RANDOM,
+  FILE
+}

app/src/main/java/ru/project/ui/creation/FillMethodSelectionWindow.java

@@ -0,0 +1,36 @@
+package ru.project.ui.creation;
+
+import com.googlecode.lanterna.gui2.ActionListBox;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import java.util.function.Consumer;
+import ru.project.ui.base.BaseModalWindow;
+
+public class FillMethodSelectionWindow extends BaseModalWindow {
+
+  private final Consumer<FillMethod> onFillMethodSelected;
+
+  public FillMethodSelectionWindow(
+      WindowBasedTextGUI gui, Consumer<FillMethod> onFillMethodSelected) {
+
+    super("Выбор способа заполнения", gui);
+
+    this.onFillMethodSelected = onFillMethodSelected;
+
+    ActionListBox menu = new ActionListBox();
+
+    menu.addItem("Пользовательские данные", () -> selectFillMethod(FillMethod.CUSTOM));
+
+    menu.addItem("Случайные данные", () -> selectFillMethod(FillMethod.RANDOM));
+
+    menu.addItem("Данные из файла", () -> selectFillMethod(FillMethod.FILE));
+
+    menu.addItem("Выйти", this::close);
+
+    setComponent(menu);
+  }
+
+  private void selectFillMethod(FillMethod fillMethod) {
+    onFillMethodSelected.accept(fillMethod);
+    close();
+  }
+}

app/src/main/java/ru/project/ui/main/MainMenu.java

@@ -0,0 +1,80 @@
+package ru.project.ui.main;
+
+import com.googlecode.lanterna.gui2.ActionListBox;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import ru.project.collection.MyList;
+import ru.project.model.AppState;
+import ru.project.student.Student;
+import ru.project.ui.base.BaseModalWindow;
+import ru.project.ui.common.CollectionDisplayWindow;
+import ru.project.ui.common.MessageWindow;
+import ru.project.ui.creation.CreateCollectionMenu;
+import ru.project.ui.sorting.SortCollectionMenu;
+
+public class MainMenu extends BaseModalWindow {
+
+  private final ActionListBox menu;
+
+  private final BaseModalWindow createCollectionMenu;
+  private final BaseModalWindow sortCollectionMenu;
+
+  public MainMenu(WindowBasedTextGUI gui, AppState state) {
+    super("Главное меню", gui);
+
+    this.createCollectionMenu = new CreateCollectionMenu(gui, state);
+    this.sortCollectionMenu = new SortCollectionMenu(gui, state);
+
+    menu = new ActionListBox();
+
+    menu.addItem("Показать текущую коллекцию", () -> showMainCollection(state));
+
+    menu.addItem("Меню создания новой коллекции", this::showCreateCollectionMenu);
+
+    menu.addItem("Меню сохранения текущей коллекции в файл", this::saveCollection);
+
+    menu.addItem("Меню сортировки текущей коллекции", this::sortCollection);
+
+    menu.addItem("Меню поиска элемента в текущей коллекции", this::searchCollection);
+
+    menu.addItem("Меню подсчёта количества вхождений элемента", this::countOccurrences);
+
+    menu.addItem("Завершить выполнение программы", this::exit);
+
+    setComponent(menu);
+  }
+
+  private void showMainCollection(AppState state) {
+    MyList<Student> mainCollection = state.getMainCollection();
+
+    BaseModalWindow window = new CollectionDisplayWindow(gui, mainCollection);
+
+    window.showModal();
+  }
+
+  private void showCreateCollectionMenu() {
+    createCollectionMenu.showModal();
+  }
+
+  private void saveCollection() {
+    // TODO
+    MessageWindow.showModal(gui, "Не реализовано.");
+  }
+
+  private void sortCollection() {
+    sortCollectionMenu.showModal();
+  }
+
+  private void searchCollection() {
+    // TODO
+    MessageWindow.showModal(gui, "Не реализовано.");
+  }
+
+  private void countOccurrences() {
+    // TODO
+    MessageWindow.showModal(gui, "Не реализовано.");
+  }
+
+  private void exit() {
+    close();
+  }
+}

app/src/main/java/ru/project/ui/sorting/NormalSortSettingsWindow.java

@@ -0,0 +1,45 @@
+package ru.project.ui.sorting;
+
+import com.googlecode.lanterna.gui2.ActionListBox;
+import com.googlecode.lanterna.gui2.Button;
+import com.googlecode.lanterna.gui2.LinearLayout;
+import com.googlecode.lanterna.gui2.Panel;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import java.util.function.Consumer;
+import ru.project.ui.base.BaseModalWindow;
+
+public class NormalSortSettingsWindow extends BaseModalWindow {
+
+  private final Consumer<SortField> onSortFieldSelected;
+
+  public NormalSortSettingsWindow(WindowBasedTextGUI gui, Consumer<SortField> onSortFieldSelected) {
+
+    super("Обычная сортировка", gui);
+
+    this.onSortFieldSelected = onSortFieldSelected;
+
+    Panel panel = new Panel();
+    panel.setLayoutManager(new LinearLayout());
+
+    ActionListBox menu = new ActionListBox();
+
+    menu.addItem("Сортировать по номеру группы", () -> selectSortField(SortField.GROUP_NUMBER));
+
+    menu.addItem("Сортировать по среднему баллу", () -> selectSortField(SortField.AVERAGE_GRADE));
+
+    menu.addItem(
+        "Сортировать по номеру зачётной книжки",
+        () -> selectSortField(SortField.RECORD_BOOK_NUMBER));
+
+    panel.addComponent(menu);
+
+    panel.addComponent(new Button("Выйти", this::close));
+
+    setComponent(panel);
+  }
+
+  private void selectSortField(SortField sortField) {
+    onSortFieldSelected.accept(sortField);
+    close();
+  }
+}

app/src/main/java/ru/project/ui/sorting/ParitySortSettingsWindow.java

@@ -0,0 +1,24 @@
+package ru.project.ui.sorting;
+
+import com.googlecode.lanterna.gui2.Button;
+import com.googlecode.lanterna.gui2.Label;
+import com.googlecode.lanterna.gui2.LinearLayout;
+import com.googlecode.lanterna.gui2.Panel;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import ru.project.ui.base.BaseModalWindow;
+
+public class ParitySortSettingsWindow extends BaseModalWindow {
+
+  public ParitySortSettingsWindow(WindowBasedTextGUI gui) {
+    super("Настройка сортировки по чётности", gui);
+
+    Panel panel = new Panel();
+    panel.setLayoutManager(new LinearLayout());
+
+    panel.addComponent(new Label("Сортировка выполняется по номеру зачётной книжки."));
+
+    panel.addComponent(new Button("Назад", this::close));
+
+    setComponent(panel);
+  }
+}

app/src/main/java/ru/project/ui/sorting/SortCollectionMenu.java

@@ -0,0 +1,126 @@
+package ru.project.ui.sorting;
+
+import com.googlecode.lanterna.gui2.Button;
+import com.googlecode.lanterna.gui2.Label;
+import com.googlecode.lanterna.gui2.LinearLayout;
+import com.googlecode.lanterna.gui2.Panel;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import ru.project.model.AppState;
+import ru.project.ui.base.BaseModalWindow;
+import ru.project.ui.common.MessageWindow;
+
+public class SortCollectionMenu extends BaseModalWindow {
+
+  private final AppState state;
+
+  private final Label sortMethodLabel;
+  private final Label sortFieldLabel;
+
+  private final SortMethodSelectionWindow sortMethodSelectionWindow;
+  private final NormalSortSettingsWindow normalSortSettingsWindow;
+  private final ParitySortSettingsWindow paritySortSettingsWindow;
+
+  private SortMethod selectedSortMethod;
+  private SortField selectedSortField;
+
+  public SortCollectionMenu(WindowBasedTextGUI gui, AppState state) {
+
+    super("Меню сортировки текущей коллекции", gui);
+
+    this.state = state;
+    this.selectedSortMethod = SortMethod.NORMAL;
+    this.selectedSortField = SortField.GROUP_NUMBER;
+
+    Panel panel = new Panel();
+    panel.setLayoutManager(new LinearLayout());
+
+    this.sortMethodLabel = new Label("Способ сортировки: " + getSortMethodName(selectedSortMethod));
+
+    this.sortFieldLabel = new Label("Сортировать по: " + getSortFieldName(selectedSortField));
+
+    this.sortMethodSelectionWindow =
+        new SortMethodSelectionWindow(
+            gui,
+            sortMethod -> {
+              selectedSortMethod = sortMethod;
+
+              sortMethodLabel.setText(
+                  "Способ сортировки: " + getSortMethodName(selectedSortMethod));
+            });
+
+    this.normalSortSettingsWindow =
+        new NormalSortSettingsWindow(
+            gui,
+            sortField -> {
+              selectedSortField = sortField;
+            });
+
+    this.paritySortSettingsWindow = new ParitySortSettingsWindow(gui);
+
+    panel.addComponent(sortMethodLabel);
+    panel.addComponent(sortFieldLabel);
+
+    panel.addComponent(new Button("Выбрать способ сортировки", this::selectSortMethod));
+
+    panel.addComponent(
+        new Button("Настроить текущий способ сортировки", this::setupCurrentSortMethod));
+
+    panel.addComponent(new Button("Сортировать текущую коллекцию", this::sortCurrentCollection));
+
+    panel.addComponent(new Button("Выйти", this::close));
+
+    setComponent(panel);
+  }
+
+  private void setupCurrentSortMethod() {
+    switch (selectedSortMethod) {
+      case NORMAL -> normalSortSettingsWindow.showModal();
+
+      case PARITY -> paritySortSettingsWindow.showModal();
+    }
+  }
+
+  private void selectSortMethod() {
+    sortMethodSelectionWindow.showModal();
+  }
+
+  private void sortCurrentCollection() {
+    if (state.getMainCollection() == null || state.getMainCollection().isEmpty()) {
+
+      MessageWindow.showModal(gui, "Текущая коллекция пуста.");
+
+      return;
+    }
+
+    switch (selectedSortMethod) {
+      case NORMAL -> sortNormally();
+
+      case PARITY -> sortByParity();
+    }
+  }
+
+  private void sortNormally() {
+    // TODO
+    MessageWindow.showModal(gui, "Обычная сортировка не реализована.");
+  }
+
+  private void sortByParity() {
+    // TODO
+    MessageWindow.showModal(gui, "Сортировка по чётности не реализована.");
+  }
+
+  private String getSortMethodName(SortMethod sortMethod) {
+    return switch (sortMethod) {
+      case NORMAL -> "Обычная сортировка";
+      case PARITY -> "Сортировка по чётности";
+    };
+  }
+
+  private String getSortFieldName(SortField sortField) {
+    return switch (sortField) {
+      case GROUP_NUMBER -> "номеру группы";
+      case AVERAGE_GRADE -> "среднему баллу";
+      case RECORD_BOOK_NUMBER -> "номеру зачётной книжки";
+    };
+  }
+}

app/src/main/java/ru/project/ui/sorting/SortField.java

@@ -0,0 +1,7 @@
+package ru.project.ui.sorting;
+
+public enum SortField {
+  GROUP_NUMBER,
+  AVERAGE_GRADE,
+  RECORD_BOOK_NUMBER
+}

app/src/main/java/ru/project/ui/sorting/SortMethod.java

@@ -0,0 +1,6 @@
+package ru.project.ui.sorting;
+
+public enum SortMethod {
+  NORMAL,
+  PARITY
+}

app/src/main/java/ru/project/ui/sorting/SortMethodSelectionWindow.java

@@ -0,0 +1,34 @@
+package ru.project.ui.sorting;
+
+import com.googlecode.lanterna.gui2.ActionListBox;
+import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
+import java.util.function.Consumer;
+import ru.project.ui.base.BaseModalWindow;
+
+public class SortMethodSelectionWindow extends BaseModalWindow {
+
+  private final Consumer<SortMethod> onSortMethodSelected;
+
+  public SortMethodSelectionWindow(
+      WindowBasedTextGUI gui, Consumer<SortMethod> onSortMethodSelected) {
+
+    super("Выбрать способ сортировки", gui);
+
+    this.onSortMethodSelected = onSortMethodSelected;
+
+    ActionListBox menu = new ActionListBox();
+
+    menu.addItem("Обычная сортировка", () -> selectSortMethod(SortMethod.NORMAL));
+
+    menu.addItem("Сортировка по чётности", () -> selectSortMethod(SortMethod.PARITY));
+
+    menu.addItem("Выйти", this::close);
+
+    setComponent(menu);
+  }
+
+  private void selectSortMethod(SortMethod sortMethod) {
+    onSortMethodSelected.accept(sortMethod);
+    close();
+  }
+}

app/src/test/java/ru/project/AppTest.java

@@ -4,16 +4,12 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import org.junit.jupiter.api.Test;
 
-/**
- * Unit test for simple App.
- */
+/** Unit test for simple App. */
 public class AppTest {
 
-    /**
-     * Rigorous Test :-)
-     */
-    @Test
-    public void shouldAnswerWithTrue() {
-        assertTrue(true);
-    }
+  /** Rigorous Test :-) */
+  @Test
+  public void shouldAnswerWithTrue() {
+    assertTrue(true);
+  }
 }

app/src/test/java/ru/project/sorting/EvenOnlySortStrategyTest.java

@@ -0,0 +1,286 @@
+package ru.project.sorting;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertSame;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.Comparator;
+import org.junit.jupiter.api.Test;
+import ru.project.collection.MyLinkedList;
+import ru.project.collection.MyList;
+import ru.project.student.Student;
+
+class EvenOnlySortStrategyTest {
+
+  @Test
+  void shouldHandleEmptyList() {
+    MyList<Integer> list = new MyLinkedList<>();
+
+    EvenOnlySortStrategy<Integer> strategy =
+        new EvenOnlySortStrategy<>(new MergeSortStrategy<>(), value -> value);
+
+    strategy.sort(list, Integer::compare);
+
+    assertEquals(0, list.size());
+  }
+
+  @Test
+  void shouldKeepSingleEvenElementUnchanged() {
+    MyList<Integer> list = new MyLinkedList<>();
+    list.add(4);
+
+    EvenOnlySortStrategy<Integer> strategy =
+        new EvenOnlySortStrategy<>(new MergeSortStrategy<>(), value -> value);
+
+    strategy.sort(list, Integer::compare);
+
+    assertEquals(4, list.get(0));
+    assertEquals(1, list.size());
+  }
+
+  @Test
+  void shouldKeepSingleOddElementUnchanged() {
+    MyList<Integer> list = new MyLinkedList<>();
+    list.add(7);
+
+    EvenOnlySortStrategy<Integer> strategy =
+        new EvenOnlySortStrategy<>(new MergeSortStrategy<>(), value -> value);
+
+    strategy.sort(list, Integer::compare);
+
+    assertEquals(7, list.get(0));
+    assertEquals(1, list.size());
+  }
+
+  @Test
+  void shouldHandleDuplicateEvenValues() {
+    MyList<Integer> list = new MyLinkedList<>();
+
+    list.add(8);
+    list.add(4);
+    list.add(8);
+    list.add(2);
+    list.add(4);
+
+    EvenOnlySortStrategy<Integer> strategy =
+        new EvenOnlySortStrategy<>(new MergeSortStrategy<>(), value -> value);
+
+    strategy.sort(list, Integer::compare);
+
+    assertEquals(2, list.get(0));
+    assertEquals(4, list.get(1));
+    assertEquals(4, list.get(2));
+    assertEquals(8, list.get(3));
+    assertEquals(8, list.get(4));
+  }
+
+  @Test
+  void shouldKeepOddStudentObjectsAtSameIndexes() {
+    Student oddFirst = new Student("A01", 4.0, 7);
+    Student evenFirst = new Student("A02", 4.0, 8);
+    Student oddSecond = new Student("A03", 4.0, 3);
+    Student evenSecond = new Student("A04", 4.0, 2);
+    Student oddThird = new Student("A05", 4.0, 5);
+    Student evenThird = new Student("A06", 4.0, 4);
+
+    MyList<Student> students = new MyLinkedList<>();
+
+    students.add(oddFirst);
+    students.add(evenFirst);
+    students.add(oddSecond);
+    students.add(evenSecond);
+    students.add(oddThird);
+    students.add(evenThird);
+
+    EvenOnlySortStrategy<Student> strategy =
+        new EvenOnlySortStrategy<>(new MergeSortStrategy<>(), Student::getRecordBookNumber);
+
+    strategy.sort(students, new StudentRecordBookComparator());
+
+    assertSame(oddFirst, students.get(0));
+    assertSame(oddSecond, students.get(2));
+    assertSame(oddThird, students.get(4));
+
+    assertEquals(2, students.get(1).getRecordBookNumber());
+    assertEquals(4, students.get(3).getRecordBookNumber());
+    assertEquals(8, students.get(5).getRecordBookNumber());
+  }
+
+  @Test
+  void shouldSortWhenStrategyPassedThroughConstructor() {
+    MyList<Integer> list = new MyLinkedList<>();
+
+    list.add(8);
+    list.add(2);
+    list.add(4);
+
+    EvenOnlySortStrategy<Integer> strategy = new EvenOnlySortStrategy<>(new MergeSortStrategy<>());
+
+    strategy.setValueExtractor(value -> value);
+
+    strategy.sort(list, Integer::compare);
+
+    assertEquals(2, list.get(0));
+    assertEquals(4, list.get(1));
+    assertEquals(8, list.get(2));
+  }
+
+  @Test
+  void shouldSortOnlyEvenElements() {
+    MyList<Student> students = new MyLinkedList<>();
+
+    students.add(new Student("A01", 4.0, 7));
+    students.add(new Student("A02", 4.0, 8));
+    students.add(new Student("A03", 4.0, 3));
+    students.add(new Student("A04", 4.0, 2));
+    students.add(new Student("A05", 4.0, 5));
+    students.add(new Student("A06", 4.0, 4));
+
+    EvenOnlySortStrategy<Student> strategy =
+        new EvenOnlySortStrategy<>(new MergeSortStrategy<>(), Student::getRecordBookNumber);
+
+    strategy.sort(students, new StudentRecordBookComparator());
+
+    assertEquals(7, students.get(0).getRecordBookNumber());
+    assertEquals(2, students.get(1).getRecordBookNumber());
+    assertEquals(3, students.get(2).getRecordBookNumber());
+    assertEquals(4, students.get(3).getRecordBookNumber());
+    assertEquals(5, students.get(4).getRecordBookNumber());
+    assertEquals(8, students.get(5).getRecordBookNumber());
+
+    assertEquals(6, students.size());
+  }
+
+  @Test
+  void shouldSortAllEvenElements() {
+    MyList<Integer> list = new MyLinkedList<>();
+
+    list.add(8);
+    list.add(2);
+    list.add(6);
+    list.add(4);
+
+    EvenOnlySortStrategy<Integer> strategy =
+        new EvenOnlySortStrategy<>(new MergeSortStrategy<>(), value -> value);
+
+    strategy.sort(list, Integer::compare);
+
+    assertEquals(2, list.get(0));
+    assertEquals(4, list.get(1));
+    assertEquals(6, list.get(2));
+    assertEquals(8, list.get(3));
+  }
+
+  @Test
+  void shouldKeepOddElementsUnchanged() {
+    MyList<Integer> list = new MyLinkedList<>();
+
+    list.add(7);
+    list.add(3);
+    list.add(5);
+    list.add(1);
+
+    EvenOnlySortStrategy<Integer> strategy =
+        new EvenOnlySortStrategy<>(new MergeSortStrategy<>(), value -> value);
+
+    strategy.sort(list, Integer::compare);
+
+    assertEquals(7, list.get(0));
+    assertEquals(3, list.get(1));
+    assertEquals(5, list.get(2));
+    assertEquals(1, list.get(3));
+  }
+
+  @Test
+  void shouldThrowWhenSortStrategyIsNotSet() {
+    EvenOnlySortStrategy<Integer> strategy = new EvenOnlySortStrategy<>();
+
+    strategy.setValueExtractor(value -> value);
+
+    MyList<Integer> list = new MyLinkedList<>();
+    list.add(2);
+    list.add(4);
+
+    assertThrows(IllegalStateException.class, () -> strategy.sort(list, Integer::compare));
+  }
+
+  @Test
+  void shouldRejectNullSortStrategy() {
+    EvenOnlySortStrategy<Integer> strategy = new EvenOnlySortStrategy<>();
+
+    assertThrows(IllegalArgumentException.class, () -> strategy.setSortStrategy(null));
+  }
+
+  @Test
+  void shouldDelegateSortingToProvidedStrategy() {
+    MyList<Integer> list = new MyLinkedList<>();
+
+    list.add(7);
+    list.add(8);
+    list.add(3);
+    list.add(2);
+
+    RecordingSortStrategy recordingStrategy = new RecordingSortStrategy();
+
+    EvenOnlySortStrategy<Integer> strategy =
+        new EvenOnlySortStrategy<>(recordingStrategy, value -> value);
+
+    strategy.sort(list, Integer::compare);
+
+    assertTrue(recordingStrategy.wasCalled);
+    assertEquals(2, recordingStrategy.receivedSize);
+    assertEquals(8, recordingStrategy.firstReceivedElement);
+    assertEquals(2, recordingStrategy.secondReceivedElement);
+  }
+
+  @Test
+  void shouldUseNewStrategyAfterReplacement() {
+    RecordingSortStrategy firstStrategy = new RecordingSortStrategy();
+
+    RecordingSortStrategy secondStrategy = new RecordingSortStrategy();
+
+    EvenOnlySortStrategy<Integer> strategy =
+        new EvenOnlySortStrategy<>(firstStrategy, value -> value);
+
+    MyList<Integer> firstList = new MyLinkedList<>();
+    firstList.add(4);
+    firstList.add(2);
+
+    strategy.sort(firstList, Integer::compare);
+
+    assertTrue(firstStrategy.wasCalled);
+
+    strategy.setSortStrategy(secondStrategy);
+
+    MyList<Integer> secondList = new MyLinkedList<>();
+    secondList.add(8);
+    secondList.add(6);
+
+    strategy.sort(secondList, Integer::compare);
+
+    assertTrue(secondStrategy.wasCalled);
+  }
+
+  private static class RecordingSortStrategy implements SortStrategy<Integer> {
+
+    private boolean wasCalled;
+    private int receivedSize;
+    private Integer firstReceivedElement;
+    private Integer secondReceivedElement;
+
+    @Override
+    public void sort(MyList<Integer> list, Comparator<Integer> comparator) {
+      wasCalled = true;
+      receivedSize = list.size();
+
+      if (list.size() > 0) {
+        firstReceivedElement = list.get(0);
+      }
+
+      if (list.size() > 1) {
+        secondReceivedElement = list.get(1);
+      }
+    }
+  }
+}

app/src/test/java/ru/project/sorting/SortStrategyTest.java

@@ -0,0 +1,162 @@
+package ru.project.sorting;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.util.Comparator;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import ru.project.collection.MyLinkedList;
+import ru.project.collection.MyList;
+import ru.project.student.Student;
+
+class SortStrategyTest {
+
+  private MyList<Student> students;
+  private final Comparator<Student> groupComparator = new StudentGroupComparator();
+  private final Comparator<Student> gradeComparator = new StudentAverageGradeComparator();
+  private final Comparator<Student> recordComparator = new StudentRecordBookComparator();
+
+  @BeforeEach
+  void setUp() {
+    students = new MyLinkedList<>();
+    students.add(new Student("A12", 4.5, 12345));
+    students.add(new Student("B32", 3.8, 12346));
+    students.add(new Student("Z00", 4.9, 12347));
+    students.add(new Student("A12", 4.2, 12348));
+    students.add(new Student("B32", 5.0, 12349));
+  }
+
+  @Test
+  void testMergeSortByGroupNumber() {
+    SortStrategy<Student> strategy = new MergeSortStrategy<>();
+    strategy.sort(students, groupComparator);
+    assertOrder(students, "A12", "A12", "B32", "B32", "Z00");
+  }
+
+  @Test
+  void testMergeSortByAverageGrade() {
+    SortStrategy<Student> strategy = new MergeSortStrategy<>();
+    strategy.sort(students, gradeComparator);
+    assertOrder(students, 3.8, 4.2, 4.5, 4.9, 5.0);
+  }
+
+  @Test
+  void testMergeSortByRecordBookNumber() {
+    SortStrategy<Student> strategy = new MergeSortStrategy<>();
+    strategy.sort(students, recordComparator);
+    assertOrder(students, 12345, 12346, 12347, 12348, 12349);
+  }
+
+  @Test
+  void testBubbleSortByGroupNumber() {
+    SortStrategy<Student> strategy = new BubbleSortStrategy<>();
+    strategy.sort(students, groupComparator);
+    assertOrder(students, "A12", "A12", "B32", "B32", "Z00");
+  }
+
+  @Test
+  void testBubbleSortByAverageGrade() {
+    SortStrategy<Student> strategy = new BubbleSortStrategy<>();
+    strategy.sort(students, gradeComparator);
+    assertOrder(students, 3.8, 4.2, 4.5, 4.9, 5.0);
+  }
+
+  @Test
+  void testBubbleSortByRecordBookNumber() {
+    SortStrategy<Student> strategy = new BubbleSortStrategy<>();
+    strategy.sort(students, recordComparator);
+    assertOrder(students, 12345, 12346, 12347, 12348, 12349);
+  }
+
+  @Test
+  void testEvenOnlySortByRecordBookNumber() {
+    MyList<Student> list = new MyLinkedList<>();
+    list.add(new Student("A01", 4.5, 7));
+    list.add(new Student("A02", 4.5, 8));
+    list.add(new Student("A03", 4.5, 3));
+    list.add(new Student("A04", 4.5, 2));
+    list.add(new Student("A05", 4.5, 5));
+    list.add(new Student("A06", 4.5, 4));
+
+    EvenOnlyMergeSortStrategy<Student> strategy =
+        new EvenOnlyMergeSortStrategy<>(Student::getRecordBookNumber);
+    strategy.sort(list, Comparator.comparingInt(Student::getRecordBookNumber));
+
+    int[] expected = {7, 2, 3, 4, 5, 8};
+    for (int i = 0; i < list.size(); i++) {
+      assertEquals(expected[i], list.get(i).getRecordBookNumber());
+    }
+  }
+
+  @Test
+  void testEvenOnlyWithNoEvenElements() {
+    MyList<Student> list = new MyLinkedList<>();
+    list.add(new Student("A01", 4.5, 1));
+    list.add(new Student("A02", 4.5, 3));
+    list.add(new Student("A03", 4.5, 5));
+
+    EvenOnlyMergeSortStrategy<Student> strategy =
+        new EvenOnlyMergeSortStrategy<>(Student::getRecordBookNumber);
+    strategy.sort(list, Comparator.comparingInt(Student::getRecordBookNumber));
+
+    int[] expected = {1, 3, 5};
+    for (int i = 0; i < list.size(); i++) {
+      assertEquals(expected[i], list.get(i).getRecordBookNumber());
+    }
+  }
+
+  @Test
+  void testEvenOnlyWithAllEvenElements() {
+    MyList<Student> list = new MyLinkedList<>();
+    list.add(new Student("A01", 4.5, 4));
+    list.add(new Student("A02", 4.5, 2));
+    list.add(new Student("A03", 4.5, 6));
+
+    EvenOnlyMergeSortStrategy<Student> strategy =
+        new EvenOnlyMergeSortStrategy<>(Student::getRecordBookNumber);
+    strategy.sort(list, Comparator.comparingInt(Student::getRecordBookNumber));
+
+    int[] expected = {2, 4, 6};
+    for (int i = 0; i < list.size(); i++) {
+      assertEquals(expected[i], list.get(i).getRecordBookNumber());
+    }
+  }
+
+  @Test
+  void testSortEmptyList() {
+    MyList<Student> empty = new MyLinkedList<>();
+    SortStrategy<Student> strategy = new MergeSortStrategy<>();
+    strategy.sort(empty, groupComparator);
+    assertEquals(0, empty.size());
+  }
+
+  @Test
+  void testSortSingleElement() {
+    MyList<Student> single = new MyLinkedList<>();
+    single.add(new Student("A12", 4.5, 12345));
+    SortStrategy<Student> strategy = new MergeSortStrategy<>();
+    strategy.sort(single, groupComparator);
+    assertEquals(1, single.size());
+  }
+
+  private void assertOrder(MyList<Student> list, String... groups) {
+    assertEquals(groups.length, list.size());
+    for (int i = 0; i < groups.length; i++) {
+      assertEquals(groups[i], list.get(i).getGroupNumber());
+    }
+  }
+
+  private void assertOrder(MyList<Student> list, double... grades) {
+    assertEquals(grades.length, list.size());
+    for (int i = 0; i < grades.length; i++) {
+      assertEquals(grades[i], list.get(i).getAverageGrade(), 0.001);
+    }
+  }
+
+  private void assertOrder(MyList<Student> list, int... records) {
+    assertEquals(records.length, list.size());
+    for (int i = 0; i < records.length; i++) {
+      assertEquals(records[i], list.get(i).getRecordBookNumber());
+    }
+  }
+}

app/src/test/java/ru/project/student/StudentTest.java

@@ -0,0 +1,141 @@
+package ru.project.student;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertNotSame;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Test;
+
+class StudentTest {
+
+  @Test
+  void testValidStudentCreation() {
+    Student student = new Student("A12", 4.5, 12345);
+    assertEquals("A12", student.getGroupNumber());
+    assertEquals(4.5, student.getAverageGrade());
+    assertEquals(12345, student.getRecordBookNumber());
+  }
+
+  @Test
+  void testValidGroupNumbers() {
+    assertDoesNotThrow(() -> new Student("A12", 4.5, 1));
+    assertDoesNotThrow(() -> new Student("B32", 4.5, 1));
+    assertDoesNotThrow(() -> new Student("Z00", 4.5, 1));
+  }
+
+  @Test
+  void testInvalidGroupNumbers() {
+    assertThrows(IllegalArgumentException.class, () -> new Student("a12", 4.5, 1));
+    assertThrows(IllegalArgumentException.class, () -> new Student("A1", 4.5, 1));
+    assertThrows(IllegalArgumentException.class, () -> new Student("A123", 4.5, 1));
+    assertThrows(IllegalArgumentException.class, () -> new Student("AA1", 4.5, 1));
+    assertThrows(IllegalArgumentException.class, () -> new Student("а1А", 4.5, 1));
+    assertThrows(IllegalArgumentException.class, () -> new Student("аа!!а123", 4.5, 1));
+    assertThrows(IllegalArgumentException.class, () -> new Student("23фи!12", 4.5, 1));
+    assertThrows(IllegalArgumentException.class, () -> new Student("№№###*()", 4.5, 1));
+  }
+
+  @Test
+  void testValidAverageGrades() {
+    assertDoesNotThrow(() -> new Student("A12", 0.0, 1));
+    assertDoesNotThrow(() -> new Student("A12", 5.0, 1));
+  }
+
+  @Test
+  void testInvalidAverageGrades() {
+    assertThrows(IllegalArgumentException.class, () -> new Student("A12", -1.0, 1));
+    assertThrows(IllegalArgumentException.class, () -> new Student("A12", 6.0, 1));
+  }
+
+  @Test
+  void testValidRecordBookNumbers() {
+    assertDoesNotThrow(() -> new Student("A12", 4.5, 1));
+    assertDoesNotThrow(() -> new Student("A12", 4.5, 12345));
+  }
+
+  @Test
+  void testInvalidRecordBookNumbers() {
+    assertThrows(IllegalArgumentException.class, () -> new Student("A12", 4.5, 0));
+    assertThrows(IllegalArgumentException.class, () -> new Student("A12", 4.5, -1));
+  }
+
+  @Test
+  void testWithGroupNumber() {
+    Student original = new Student("A12", 4.5, 12345);
+    Student updated = original.withGroupNumber("B32");
+
+    assertNotSame(original, updated);
+    assertEquals("B32", updated.getGroupNumber());
+    assertEquals(4.5, updated.getAverageGrade());
+    assertEquals(12345, updated.getRecordBookNumber());
+
+    assertEquals("A12", original.getGroupNumber());
+  }
+
+  @Test
+  void testWithAverageGrade() {
+    Student original = new Student("A12", 4.5, 12345);
+    Student updated = original.withAverageGrade(4.8);
+
+    assertNotSame(original, updated);
+    assertEquals(4.8, updated.getAverageGrade());
+    assertEquals("A12", updated.getGroupNumber());
+    assertEquals(12345, updated.getRecordBookNumber());
+
+    assertEquals(4.5, original.getAverageGrade());
+  }
+
+  @Test
+  void testWithRecordBookNumber() {
+    Student original = new Student("A12", 4.5, 12345);
+    Student updated = original.withRecordBookNumber(99999);
+
+    assertNotSame(original, updated);
+    assertEquals(99999, updated.getRecordBookNumber());
+    assertEquals("A12", updated.getGroupNumber());
+    assertEquals(4.5, updated.getAverageGrade());
+
+    assertEquals(12345, original.getRecordBookNumber());
+  }
+
+  @Test
+  void testWithInvalidGroupNumber() {
+    Student original = new Student("A12", 4.5, 12345);
+    assertThrows(IllegalArgumentException.class, () -> original.withGroupNumber("a12"));
+    assertEquals("A12", original.getGroupNumber()); // не изменился
+  }
+
+  @Test
+  void testWithInvalidAverageGrade() {
+    Student original = new Student("A12", 4.5, 12345);
+    assertThrows(IllegalArgumentException.class, () -> original.withAverageGrade(6.0));
+    assertEquals(4.5, original.getAverageGrade());
+  }
+
+  @Test
+  void testWithInvalidRecordBookNumber() {
+    Student original = new Student("A12", 4.5, 12345);
+    assertThrows(IllegalArgumentException.class, () -> original.withRecordBookNumber(0));
+    assertEquals(12345, original.getRecordBookNumber());
+  }
+
+  @Test
+  void testEqualsAndHashCode() {
+    Student s1 = new Student("A12", 4.5, 12345);
+    Student s2 = new Student("A12", 4.5, 12345);
+    Student s3 = new Student("B32", 4.5, 12345);
+    Student s4 = new Student("A12", 4.8, 12345);
+    Student s5 = new Student("A12", 4.5, 99999);
+
+    assertEquals(s1, s2);
+    assertEquals(s1.hashCode(), s2.hashCode());
+
+    assertNotEquals(s1, s3);
+    assertNotEquals(s1, s4);
+    assertNotEquals(s1, s5);
+    assertNotEquals(s1, null);
+    assertNotEquals(s1, "some string");
+  }
+}

docs/MENU.ru.txt

@@ -0,0 +1,130 @@
+Главное меню
+{
+  Показать текущую коллекцию
+
+  Меню создания новой коллекции
+  {
+    Вернуться
+
+    Задать размер
+
+    Настроить способ заполнения
+    {
+      Пользовательские данные
+      {
+        Задать поле 'Название A'
+        Задать поле 'Название B'
+        Задать поле 'Название C'
+        Задать индекс изменяемого объекта
+        Изменить данные объекта
+        Предпросмотр
+      }
+
+      Случайные данные
+      {
+        Настройка диапазона генерации
+        {
+          Поле 'Название A'
+          {
+            Задать минимальное значение
+            Задать максимальное значение
+          }
+
+          Поле 'Название B'
+          {
+            Задать минимальное значение
+            Задать максимальное значение
+          }
+
+          Поле 'Название C'
+          {
+            Задать минимальное значение
+            Задать максимальное значение
+          }
+        }
+      }
+
+      Данные из файла
+      {
+        Задать путь до файла
+        {
+          Абсолютный
+          Относительный
+        }
+      }
+    }
+
+    Выбрать способ заполнения
+    {
+      Пользовательские данные *
+      Случайные данные
+      Данные из файла
+    }
+
+    Создать новую коллекцию
+  }
+
+  Меню сохранения текущей коллекции в файл
+  {
+    Вывести текущий абсолютный путь до файла
+
+    Задать путь до файла
+    {
+      Абсолютный
+      Относительный
+    }
+
+    Дописать коллекцию в текущий файл
+  }
+
+  Меню сортировки текущей коллекции
+  {
+    Вернуться
+
+    Настроить способ сортировки
+    {
+      Обычная сортировка
+      {
+        Сортировать по полю 'Название A'
+        Сортировать по полю 'Название B'
+        Сортировать по полю 'Название C'
+      }
+    }
+
+    Настроить способ сортировки
+    {
+      Сортировка по чётности
+      {
+        Выбрать числовое поле 'Название A'
+        Выбрать числовое поле 'Название B'
+      }
+    }
+
+    Выбрать способ сортировки
+    {
+      Обычная сортировка *
+      Сортировка по чётности
+    }
+
+    Сортировать текущую коллекцию
+  }
+
+  Меню поиска элемента в текущей коллекции
+  {
+    Вернуться
+    Задать значение поля 'Название A'
+    Задать значение поля 'Название B'
+    Задать значение поля 'Название C'
+    Найти первое вхождение в текущей коллекции
+  }
+
+  Меню подсчёта количества вхождений элемента
+  {
+    Задать значение поля 'Название A'
+    Задать значение поля 'Название B'
+    Задать значение поля 'Название C'
+    Выполнить многопоточный подсчёт
+  }
+
+  Завершить выполнение программы
+}