completed task

src/main/java/ru/faang/school/hashmap/task_2/Book.java

@@ -0,0 +1,48 @@
+package ru.faang.school.hashmap.task_2;
+
+import java.util.Objects;
+
+public class Book {
+    private String title;
+    private String author;
+    private int year;
+
+    public Book(String title, String author, int year) {
+        this.title = title;
+        this.author = author;
+        this.year = year;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Book book = (Book) o;
+
+        if (year != book.year) return false;
+        if (!Objects.equals(title, book.title)) return false;
+        return Objects.equals(author, book.author);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = title != null ? title.hashCode() : 0;
+        result = 31 * result + (author != null ? author.hashCode() : 0);
+        result = 31 * result + year;
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "Book{" +
+                "title='" + title + '\'' +
+                ", author='" + author + '\'' +
+                ", year=" + year +
+                '}';
+    }
+}

src/main/java/ru/faang/school/hashmap/task_2/Main.java

@@ -0,0 +1,63 @@
+package ru.faang.school.hashmap.task_2;
+
+import javax.swing.plaf.synth.SynthEditorPaneUI;
+import java.util.HashMap;
+import java.util.Map;
+
+public class Main {
+
+    private final static Map<Book, String> library = new HashMap<>();
+
+    public static void addBookToLibrary(Book book, String location) {
+        if (library.containsKey(book)) {
+            System.out.println("Ну и приколы - абсолютно две одинаковые книги! Не может такое быть :)");
+        } else {
+            library.put(book, location);
+            System.out.println(String.format("Книгу \"%s\" положили на %s полку", book.getTitle(), location));
+        }
+    }
+
+    public static void removeBook(String title, String author, int year) {
+        Book book = new Book(title, author, year);
+        if (library.containsKey(book)) {
+            library.remove(book);
+            System.out.println(String.format("Книга %s автор %s год %d удалена", title, author, year));
+        } else {
+            System.out.println("Такой книги нет - ничего не удалили");
+        }
+    }
+
+    public static void findBook(String title, String author, int year) {
+        Book book = new Book(title, author, year);
+        if (library.containsKey(book)) {
+            System.out.println(String.format("Книга находится %s", library.get(book)));
+        } else {
+            System.out.println("Такой книги нет в библиотеке");
+        }
+    }
+
+    public static void printAllBooks() {
+        for (Map.Entry<Book, String> book: library.entrySet()) {
+            System.out.println(book + " Местонахождение: " + book.getValue());
+
+        }
+    }
+
+    public static void main(String[] args) {
+        Book book1 = new Book("Мастер и Маргарита", "Михаил Булгаков", 1929);
+        Book book2 = new Book("Собачье сердце", "Михаил Булгаков", 1925);
+        Book book3 = new Book("Ревизор", "Николай Гоголь", 1836);
+        Book book4 = new Book("Отцы и дети", "Иван Тургенев", 1860);
+        Book book5 = new Book("Мастер и Маргарита", "Михаил Булгаков", 1929);
+
+        addBookToLibrary(book1, "5");
+        addBookToLibrary(book5, "10");
+        addBookToLibrary(book3, "124");
+        printAllBooks();
+
+        removeBook("asdlas", "dals;kd", 100);
+        removeBook("Ревизор", "Николай Гоголь", 1836);
+        printAllBooks();
+
+    }
+}