library management system

Points: 40 (partial)

Time limit: 1.0s

Memory limit: 256M

Authors:

scu09156238, scu09156146

Problem type

Allowed languages

Java 19, Java 8

題目說明

設計一個簡單的圖書管理系統，系統中有兩種類型的書籍：電子書（EBook）和印刷書（PrintedBook）。你需要設計類別來表示這些書籍，並創建一個圖書館（Library）類別來管理這些書籍。

類別說明

Book 類別：

屬性：title（書名）、author（作者）方法：getDetails()，返回書籍的詳細信息

EBook 類別（繼承自 Book）：

屬性：fileSize（文件大小，MB）、format（格式，例如：PDF、EPUB）方法：覆寫 getDetails() 方法，返回包含電子書詳細信息的字符串

PrintedBook 類別（繼承自 Book）：

屬性：pageCount（頁數）、publisher（出版商）方法：覆寫 getDetails() 方法，返回包含印刷書詳細信息的字符串

Library 類別：

屬性：books（書籍列表）方法：addBook(Book book)，將書籍添加到書籍列表中

showAllBooks()，顯示所有書籍的詳細信息

底下提供程式碼版型供同學快速上手

import java.util.*;

// Book 類別
class Book {
    String title;
    String author;

    Book(String title, String author) {
        this.title = title;
        this.author = author;
    }

    String getDetails() {
        return "Title=" + title + ", Author=" + author;
    }
}

// EBook 類別，繼承自 Book
class EBook extends Book {
    double fileSize;
    String format;

    EBook(String title, String author, double fileSize, String format) {
        super(title, author);
        this.fileSize = fileSize;
        this.format = format;
    }

    @Override
    String getDetails() {
        /*
        輸入在此
        */
    }
}

// PrintedBook 類別，繼承自 Book
class PrintedBook extends Book {
    /*
    參考以上後輸入在此
    */
}

// Library 類別
class Library {
    List<Book> books;

    Library() {
        books = new ArrayList<>();
    }

    void addBook(Book book) {
        books.add(book);
    }

    void showAllBooks() {
        for (Book book : books) {
            System.out.println(book.getDetails());
            System.out.println();
        }
    }
}

// 主程式
public class t05311 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Library library = new Library();

        while (true) {
            int command = scanner.nextInt();
            if (command == 0) {
                break;
            }
            if (command == 1) {
                String title = scanner.next();
                String author = scanner.next();
                double fileSize = scanner.nextDouble();
                String format = scanner.next();
                library.addBook(new EBook(title, author, fileSize, format));
            } else if (command == 2) {
                String title = scanner.next();
                String author = scanner.next();
                int pageCount = scanner.nextInt();
                String publisher = scanner.next();
                library.addBook(new PrintedBook(title, author, pageCount, publisher));
            } else if (command == 3) {
                library.showAllBooks();
            }
        }
        scanner.close();
    }
}

輸入

輸入包含多行，每行代表一個操作：

1 title author fileSize format：添加一個電子書，包含書名、作者、文件大小和格式
2 title author pageCount publisher：添加一個印刷書，包含書名、作者、頁數和出版商
3：顯示所有書籍的詳細信息

輸入以 0 結束。

輸出

輸出包含所有書籍的詳細信息，每本書之間用空行分隔。

測試資料輸入

1 Java_Programming James_Gosling 2.5 PDF
2 Clean_Code Robert_C._Martin 464 Prentice_Hall
3
0

測試資料輸出

EBook: Title=Java_Programming, Author=James_Gosling, File Size=2.5MB, Format=PDF

PrintedBook: Title=Clean_Code, Author=Robert_C._Martin, Page Count=464, Publisher=Prentice_Hall

Comments

scu09156146 commented on June 4, 2024, 3:46 p.m.

題解

參考課堂範例A266、A294

import java.util.*;

//Book 類別
class Book {
    String title;
    String author;

    Book(String title, String author) {
        this.title = title;
        this.author = author;
    }

    String getDetails() {
        return "Title=" + title + ", Author=" + author;
    }
}

//EBook 類別，繼承自 Book
class EBook extends Book {
    double fileSize;
    String format;

    EBook(String title, String author, double fileSize, String format) {
        super(title, author);
        this.fileSize = fileSize;
        this.format = format;
    }

    @Override
    String getDetails() {
        return "EBook: " + super.getDetails() + ", File Size=" + fileSize + "MB, Format=" + format;
    }
}

//PrintedBook 類別，繼承自 Book
class PrintedBook extends Book {
    int pageCount;
    String publisher;

    PrintedBook(String title, String author, int pageCount, String publisher) {
        super(title, author);
        this.pageCount = pageCount;
        this.publisher = publisher;
    }

    @Override
    String getDetails() {
        return "PrintedBook: " + super.getDetails() + ", Page Count=" + pageCount + ", Publisher=" + publisher;
    }
}

//Library 類別
class Library {
    List<Book> books;

    Library() {
        books = new ArrayList<>();
    }

    void addBook(Book book) {
        books.add(book);
    }

    void showAllBooks() {
        for (Book book : books) {
            System.out.println(book.getDetails());
            System.out.println();
        }
    }
}

//主程式
public class Book_SuperClass {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Library library = new Library();

        while (true) {
            int command = scanner.nextInt();
            if (command == 0) {
                break;
            }
            if (command == 1) {
                String title = scanner.next();
                String author = scanner.next();
                double fileSize = scanner.nextDouble();
                String format = scanner.next();
                library.addBook(new EBook(title, author, fileSize, format));
            } else if (command == 2) {
                String title = scanner.next();
                String author = scanner.next();
                int pageCount = scanner.nextInt();
                String publisher = scanner.next();
                library.addBook(new PrintedBook(title, author, pageCount, publisher));
            } else if (command == 3) {
                library.showAllBooks();
            }
        }
        scanner.close();
    }
}