Lhe

Book.java

@@ -0,0 +1,58 @@
+import java.time.LocalDate;
+
+public class Book<T> {
+    private String title;
+    private String author;
+    private String publisher;
+    private String ISBN;
+    private LocalDate publishDate;
+    private boolean isLoaned;   //대출 여부
+    private T loanedBy;     //대출한 사용자 정보
+    private LocalDate dueDate;  //반납 예정일
+
+    //생성자
+    public Book(String title, String author, String publisher, String ISBN, LocalDate publishDate) {
+        this.title = title;
+        this.author = author;
+        this.publisher = publisher;
+        this.ISBN = ISBN;
+        this.publishDate = publishDate;
+        this.isLoaned = false;
+        this.dueDate = null;
+    }
+
+    //Getter,Setter
+
+    public String getTitle() {
+        return title;
+    }
+
+    public LocalDate getDueDate() {
+        return dueDate;
+    }
+
+    public T getLoanedBy() {
+        return loanedBy;
+    }
+
+    public void setLoanedBy(T loanedBy) {
+        this.loanedBy = loanedBy;
+        this.isLoaned = true;
+    }
+
+    //책 정보 출력
+    public void printBookInfo() {
+        System.out.println("Title: " + title);
+        System.out.println("Author: " + author);
+        System.out.println("Publisher: " + publisher);
+        System.out.println("ISBN: " + ISBN);
+        System.out.println("Published on: " + publishDate);
+        if (isLoaned) {
+            System.out.println("loaned to: " + loanedBy.toString());
+            System.out.println("Due date: " + dueDate);
+        } else {
+            System.out.println("Available for loan.");
+        }
+    }
+}
+

BookNotFoundException.java

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+public class BookNotFoundException extends Exception {
+    //생성자
+    public BookNotFoundException(String msg) {
+        super(msg);
+    }
+}

Library.java

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+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+import java.util.*;
+
+public class Library<T> {
+    // 변수 선언부
+    private static final String address = "부산 남구 용소로 45";
+    private String name; // 도서관 이름
+    private List<Book> bookList;
+    private T userContainer;
+
+    public Library(String name) {
+        this.name = name;
+        this.bookList = new ArrayList<>();
+    }
+
+    //BookNotFoundException 커스텀 예외 클래스에서 예외 처리하기 위한 메서드 작성
+    public Optional<Book> findBook(String title) throws BookNotFoundException {
+        for(Book book : bookList){ // bookList에 생성된 Book 객체 순회.
+            if(book.getTitle().equals(title)) {
+                return Optional.of(book);
+            }
+        }
+        return Optional.empty(); //책 찾지 못했을 때 빈 optional 반환.
+    }
+
+    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    LibraryController lc = new LibraryController();
+
+    public void showLibraryMemu() throws IOException {
+
+        while(true) {
+            System.out.println("메뉴를 선택하세요.");
+            System.out.println("1. 사용자 등록");
+            System.out.println("2. 사용자 탈퇴");
+            System.out.println("3. 도서 대출");
+            System.out.println("4. 도서 반납");
+            System.out.println("5. 도서 추가");
+            System.out.println("6. 도서 삭제");
+            System.out.println("7. 끝내기");
+            System.out.println("============================");
+            System.out.print("사용할 메뉴 : ");
+
+            int num = Integer.parseInt(br.readLine());
+
+            switch(num) {
+                case 1 :
+
+                    break;
+                case 2 :
+
+                    break;
+                case 3 :
+
+                    break;
+                case 4 :
+
+                    break;
+                case 5 :
+                    bookAdd();
+                    break;
+                case 6 :
+
+                    break;
+                case 7 :
+                    System.out.println("프로그램을 종료합니다.");
+                    return;
+                default :
+                    System.out.println("번호를 다시 입력해주세요.");
+            }
+
+        }
+    }
+    private Book bookAdd() throws IOException {
+        System.out.println("도서 추가");
+        System.out.print("도서명 : ");
+        String title = br.readLine();
+        System.out.print("작가명 : ");
+        String author = br.readLine();
+        //System.out.print("카테고리 : ");
+        //String category = br.readLine();
+        System.out.print("출판사 : ");
+        String publisher = br.readLine();
+        System.out.print("ISBN : ");
+        String ISBN = br.readLine();
+        System.out.print("출판일 : ");
+        String publishDateString = br.readLine();
+        LocalDate publishDate = LocalDate.parse(publishDateString, DateTimeFormatter.ofPattern("yyyyMMdd"));
+        System.out.print("가격 : ");
+        int price = Integer.parseInt(br.readLine());
+
+        // Book 클래스 생성자를 사용해 책 객체 생성
+        Book book = new Book(title, author, publisher, ISBN, publishDate);
+        bookList.add(book);
+        return book;
+    }
+
+    public static void main(String[] args) throws IOException {
+        Library pknuL = new Library("중앙도서관");
+        pknuL.showLibraryMemu();
+
+    }
+}
+

LibraryController.java

@@ -0,0 +1,3 @@
+public class LibraryController {
+
+}

LibrarySystem.java

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+import java.awt.print.Book;
+import java.util.Optional;
+
+interface LibrarySystem{
+    void addUser(int userId, String name);
+    void removeUser(int userId);
+    void addBook(Book book, int userId);
+    void borrowBook(int userId, String bookTitle);
+    void returnBook(int userId, String bookTitle);
+
+    Optional<Book> findBook(String title);
+    Optional<Users> findUser(int userId);
+}

Pair.java

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+public class Pair<T extends Object> {
+    private T x;
+    private T y;
+    public Pair(T x, T y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    public T getX() {
+        return x;
+    }
+    public T getY() {
+        return y;
+    }
+}