[Workshop] Book 등록/검색/수정/삭제

- 도서관의 책을 관리하기 위한 프로그램 작성

- Magazine은 Book

- BookManager로 Book 등록/검색/수정/삭제

- BookManagerTest로 실행

 

 

 

[Book 클래스]

package com.book;

public class Book {
	private String isbn;
	private String title;
	private String author;
	private String publisher;
	private double price;
	private String desc;
	

// 생성자
	public Book(String isbn, String title, String author, String publisher, double price, String desc) {
		this.isbn = isbn;
		this.title = title;
		this.author = author;
		this.publisher = publisher;
		this.price = price;
		this.desc = desc;
		
	}
// getter /setter 
	public String getIsbn() {
		return isbn;
	}

	public void setIsbn(String isbn) {
		this.isbn = isbn;
	}

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public String getAuthor() {
		return author;
	}

	public void setAuthor(String author) {
		this.author = author;
	}

	public String getPublisher() {
		return publisher;
	}

	public void setPublisher(String publisher) {
		this.publisher = publisher;
	}

	public double getPrice() {
		return price;
	}

	public void setPrice(double price) {
		this.price = price;
	}

	public String getDesc() {
		return desc;
	}

	public void setDesc(String desc) {
		this.desc = desc;
	}
	public String toString() {
		return isbn+", "+title+ ", "+ author+ ", "+ publisher+ ", "+ price+ ", "+ desc;
	}
}

 

[Magazine 클래스]

- Book를 부모 클래스로 Magazine 상속받음.

- Book 클래스의 isbn, title, author, publisher, price, desc를 물려받고, Magazine 고유한 필드인 year, month 를 생성자 설정.

package com.magazin;
import com.book.Book;

public class Magazine extends Book{
	private int year;
	private int month;
	public Magazine(String isbn, String title, String author, String publisher, double price, String desc, int year,int month) {
		super(isbn, title, author, publisher, price, desc);
		this.year = year;
		this.month = month;
	}
	
	public String toString() {
		return super.toString()+ year+ ", "+ month;
	}
}

 

 

[BookManager 클래스]

package com.bookmanager;
import com.book.Book;
import com.magazin.Magazine;

public class BookManager {
	int numberOfBooks=0;
	Book[] books = new Book[100];
	
	/** 1) 도서관의 책 권수 리턴
	 * @return numberOfBooks
	 */
	public int getNumberOfBooks() {
		return numberOfBooks;
	}
	
	/** 2) 책 등록
	 * @param book
	 */
	public void insertBook(Book book) {
		books[numberOfBooks++]=book;
		}	
	
	
	/** 3) 모든 책의 정보 리턴
	 * @return temp
	 */
	public Book[] getAllBook() {
		Book[] temp=new Book[numberOfBooks];
		for(int i=0;i<numberOfBooks;i++) temp[i]=books[i];
		return temp;
		}
	
	
	/** 4) 북넘버로 검색
	 * @param isbn
	 * @return books[i]
	 */
	public Book searchBookByIsbn(String isbn) {
		for(int i=0;i<numberOfBooks;i++) {
			if(books[i].getIsbn().equals(isbn))
				return(books[i]);
			}
		return null;
		}
	
	
	/** 5) 책 제목으로 검색하기
	 * @param title
	 * @return result
	 */
	public Book[] searchBookByTitle(String title) {
		int count=0;
		Book[] temp=new Book[numberOfBooks];
		for(int i=0;i<numberOfBooks;i++) {
			if(books[i].getTitle().contains(title)) {
				temp[count] = books[i];
				count++;
			}
		}
		Book[] result=new Book[count];
		for(int i=0;i<count;i++) result[i]=temp[i];
		return result;
		}
	
	
	/** 6) 출판사로 책 찾기
	 * @param publisher
	 * @return result
	 */
	public Book[] searchBookByPublisher(String publisher) {
		int count=0;
		Book[] temp=new Book[numberOfBooks];
		for(int i=0;i<numberOfBooks;i++) {
			if(books[i].getPublisher().equals(publisher)) {
				temp[count]=books[i];
				count++;
			}
		}
		Book[] result=new Book[count];	
		for(int i=0;i<count;i++) result[i]=temp[i];
		return result;
		}

	
	/** 7) 책 가격으로 찾기
	 * @param price
	 * @return result
	 */	
	public Book[] searchBookByPrice(double price) {
		Book[] temp=new Book[numberOfBooks];
		int count=0;
		for(int i=0;i<numberOfBooks;i++) {
			if((double)books[i].getPrice()==price) {
				temp[count]=books[i];
				count++;
			}				
		}
		Book[] result=new Book[count];
		for(int i=0;i<count;i++) result[i]=temp[i];
		return result;
	}

	
	/** 8) 모든 책 가격의 합 리턴
	 * @return sum
	 */	
	public double getSumPriceOfBooks() {
		double sum=0;
		for(int i=0;i<numberOfBooks;i++) sum+=(books[i].getPrice());
		return sum;
	}
	
	/** 8) 모든 책의 평균의
	 * @return avg
	 */	
	public double getAveragePriceOfBooks() {
		double avg=getSumPriceOfBooks()/numberOfBooks;
		return avg;
	}
}

 

[BookManger]

package com.bookmanager.test;

import com.book.Book;
import com.bookmanager.BookManager;
import com.magazin.Magazine;

public class BookManagerTest {
public static void main(String[] args) {
		
        BookManager manager=new BookManager();
      
      		Book book1 = new Book("L811", "Little women", "Ann...", "Famous publisher", 18000.0, "masterpiece");
		Book book2= new Book("H411", "History of Time", "Kal..", "Famous publisher", 25000.0, "masterpiece");
		Book book3 = new Book("B411", "Bullet", "Kal..", "Famous publisher", 12000.0, "masterpiece");
		Book book4 = new Book("L812", "Little women1", "Ann...", "Famous publisher", 18000.0, "masterpiece");
		Book book5= new Book("H412", "History of Time1", "Kal..", "Famous publisher", 25000.0, "masterpiece");
    		Book book6 = new Book("B412", "Bullet1", "Kal..", "Famous publisher", 12000.0, "masterpiece");
		Book magazine1 = new Magazine("N204", "Times", "marill..", "Powerful publisher", 11000.0, "must-have", 2020,4);
		Book magazine2 = new Magazine("L812", "Korean Economy", "Kim..", "Good publisher", 25000.0, "Hot issue",2020,4);
        	Book magazine3 = new Magazine("N205", "Times1", "marill..", "Powerful publisher", 11000.0, "must-have", 2020,4);
        	Book magazine4 = new Magazine("L813", "Korean Economy1", "Kim..", "Good publisher", 25000.0, "Hot issue",2020,4);

		Book[] books = {book1,book2,book3,book4,book5,magazine1,magazine2,};
		
		System.out.println("=================1) getNumberOfBooks(책의 개수)=================");
		System.out.println(manager.getNumberOfBooks());
		
		System.out.println("=================2) insertBook(책 삽입)=================");
		for (Book b : books) manager.insertBook(b);
		manager.insertBook(magazine3);
		manager.insertBook(magazine4);
		manager.insertBook(book6);

		System.out.println("=================3) getAllBook(모든 책의 정보)=================");
		for(Book book:manager.getAllBook())
			System.out.println(book);
		
		System.out.println("=================4) searchBookByIsbn(북넘버로 서치)=================");
		System.out.println(manager.searchBookByIsbn("B411"));
	
		System.out.println("=================5)searchBookByTitle(북타이틀로 서치)=================");
		for(Book book:manager.searchBookByTitle("Time"))
			System.out.println(book);
			
		System.out.println("=================6) searchBookByPublisher(출판사로 서치)=================");
		for(Book book:manager.searchBookByPublisher("Famous publisher"))
		System.out.println(book);
		
		System.out.println("=================7) searchBookByPrice(책값으로 서치)=================");
		for(Book book:manager.searchBookByPrice(25000.0))
		System.out.println(book);
		
		System.out.println("=================8) getSumPriceOfBooks(총 책값)=================");
		System.out.println(manager.getSumPriceOfBooks());
		
		System.out.println("=================9) getAveragePriceOfBooks(총 책값)=================");
		System.out.println(manager.getAveragePriceOfBooks());
	}
}