수다닷컴

책 제목하고 저자를 array에 저장하고

출력하는 프로그램입니다

Book.java만 고칠수 있습니다

두개를 [Book.java, TestBook.java]돌려서

출력이밑에와 같이 되어야합니다

코드를 고쳤거든요 Book.java의 일부를요..

근데 중간 중간에 false를 만들어서 The book requested is unavailable.를 출력하게 해야하는데요

그게 일정한게 아니라서요

밑에 있는 Book.java를 보면 toString()이 있는데요

여기서 고쳐야하는데요 여기를 어떻해 고쳐야할지 모르겠습니다

저에게 힌트를 좀 부탁드립니다
public String toString()
{
if (available = true)
return title + \n + author;
else return The book requested is unavailable.;
}
----------------------------------------------------

출력은 이와같이

The library contains 0 books.

The library contains 1 books.

The library contains 2 books.

The library contains 3 books.
theLibrary[0] is:

Aus dem Leben eines Taugenichts

Josef von Eichendorff

theLibrary[1] is:

Aquamarine

Carol Anshaw

theLibrary[2] is:

An Introduction to Object-OrientedProgramming with Java

C. Thomas Wu
theLibrary[0] is:

Aus dem Leben eines Taugenichts

Josef von Eichendorff

theLibrary[1] is:

Aquamarine

Carol Anshaw

theLibrary[2] is:

The book requested is unavailable.
theLibrary[0] is:

The book requested is unavailable.

theLibrary[1] is:

Aquamarine

Carol Anshaw

theLibrary[2] is:

The book requested is unavailable.
theLibrary[0] is:

The book requested is unavailable.

theLibrary[1] is:

Aquamarine

Carol Anshaw

theLibrary[2] is:

An Introduction to Object-OrientedProgramming with Java

C. Thomas Wu
-------------------------------------------------public class Book
{
private String author;
private String title;
private boolean available;

private static int numberOfBooks = 0;

// All four statements in this method must be altered
public Book(String initTitle, String initAuthor)
{
title = initTitle;
author = initAuthor;
boolean available = false;
numberOfBooks = numberOfBooks +1;
}

// No statements must be altered in this method
public void checkOut()
{
available = false;
}

// No statements must be altered in this method
public void checkIn()
{
available = true;
}

// One line (not even the entire statement) must be altered
// in this method
public String toString()
{
if (available = true)
return title + \n + author;
else return The book requested is unavailable.;
}

// No statements must be altered in this method
public static int libraryCount()
{
return numberOfBooks;
}
}------------------------------

public class TestBook
{
public static void main(String[] args)
{
Book[] theLibrary = new Book[3];

System.out.println(The library contains +
Book.libraryCount() + books.);

theLibrary[0] = new Book(Aus dem Leben eines Taugenichts,
Josef von Eichendorff);

System.out.println(The library contains +
Book.libraryCount() + books.);

theLibrary[1] = new Book(Aquamarine, Carol Anshaw);

System.out.println(The library contains +
Book.libraryCount() + books.);

theLibrary[2] = new Book(An Introduction to Object-Oriented +
Programming with Java, C. Thomas Wu);

System.out.println(The library contains +
Book.libraryCount() + books.\n);

for (int i = 0; i theLibrary.length; i++)
System.out.println(theLibrary[ + i + ] is:\n +
theLibrary[i].toString());
System.out.println();

theLibrary[2].checkOut();

for (int i = 0; i theLibrary.length; i++)
System.out.println(theLibrary[ + i + ] is:\n +
theLibrary[i].toString());
System.out.println();

theLibrary[0].checkOut();

for (int i = 0; i theLibrary.length; i++)
System.out.println(theLibrary[ + i + ] is:\n +
theLibrary[i].toString());
System.out.println();

theLibrary[2].checkIn();

for (int i = 0; i theLibrary.length; i++)
System.out.println(theLibrary[ + i + ] is:\n +
theLibrary[i].toString());
System.out.println();
}
}

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