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This is my code for the BookRecord.java file:
public class BookRecord
{
// Declare the variables that will be used in this class file
private String firstName;
private String lastName;
private int ISBNNumber;
private String publisherName;
// Method that is used as a no-argument constructor to call other constructor
// with default values
public BookRecord()
{
// Calls four argument constructor using default values
this( "", "", 0, "" );
} // Ends no-argument constructor
// Method used as a constructor to initialize a single record
public BookRecord( String fName, String lName, int number, String publisher )
{
// Intitialize firstName variable
setFirstName( fName );
// Intitialize lastName variable
setLastName( lName );
// Initialize ISBNNumber variable
setISBNNumber( number );
// Initialize publisherName variable
setPublisherName( publisher );
} // Ends four-argument BookRecord constructor
// Method used to set the first name
public void setFirstName( String fName )
{
firstName = fName;
} // Ends method setFirstName
// Method used to get the first name
public String getFirstName()
{
// Returns the first name
return firstName;
} // Ends method getFirstName
public void setLastName( String lName )
{
lastName = lName;
} // Ends method setLastName
public String getLastName()
{
// Returns the last name
return lastName;
} // Ends method getLastName
public void setISBNNumber( int number )
{
ISBNNumber = number;
} // Ends method setISBNNumber
public int getISBNNumber()
{
// Returns the ISBN number
return ISBNNumber;
} // Ends method getISBNNumber;
public void setPublisherName( String publisher )
{
publisherName = publisher;
} // Ends method setPublisherName
public String getPublisherName()
{
// Returns the publisher name
return publisherName;
} // Ends method getPublisherName
} // Ends class file BookRecord
This is my code for the ProcessBookRecords.java file:
// Import statements used to get all needed information and commands
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.IllegalFormatException;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.Scanner;
public class ProcessBookRecords
{
// Declaration of variables
// Declares an instance of the Scanner object
private static Scanner inputBookRecord;
// Declares an instance of the FileWriter object
private static FileWriter outputPublisherList;
// Declares an instance variable of the record that is being read
private static BookRecord bookRecord;
// Declares an instance of the ArrayList object
private static ArrayList publisherList = new ArrayList();
// Method used to open the text files used by the application
public void openFiles()
{
// Try statement that opens the text files
try
{
// Uses Scanner object to open and read from input BookRecords.txt file
inputBookRecord = new Scanner( new File( "BookRecords.txt" ) );
// Uses FileWriter object to open and write to output PublisherList.txt file
outputPublisherList = new FileWriter( "PublisherList.txt", true );
} // Ends try statement
// Catch statement used when the file is not found
catch( FileNotFoundException fileNotFoundException )
{
// Prints error message
System.err.println( "The file was not found and could not be opened." );
// Exits the program
System.exit( 1 );
} // Ends catch statement
// Catch statement used when the file cannot be accessed
catch( SecurityException securityException )
{
// Prints error message
System.err.println( "The file has restricted access and cannot be opened." );
// Exits the program
System.exit( 1 );
} // Ends catch statement
// Catch statement used when there is an I/O error
catch( IOException ioException )
{
// Prints error message
Logger.getLogger( ProcessBookRecords.class.getName() ).log( Level.SEVERE, null, ioException );
// Exits the program
System.exit( 1 );
} // Ends catch statement
} // Ends method openFiles
// Method used to read records from the input BookInformation.txt file
public BookRecord getBookRecord()
{
// Places the record being read into the record object
BookRecord record = new BookRecord();
// If statement that checks for the next record and reads it if there is one
if (inputBookRecord.hasNext() )
{
// Reads the first name
record.setFirstName( inputBookRecord.next() );
// Reads the last name
record.setLastName( inputBookRecord.next() );
// Reads the ISBN Number
record.setISBNNumber( inputBookRecord.nextInt() );
// Reads the publisher name
record.setPublisherName( inputBookRecord.next() );
} // Ends if statement
// Else statement that sets record variable to null if there are no more records to read
else
{
record = null;
} // Ends else statement
// Returns the record variable
return record;
} // Ends method BookRecord
// Method used to determine if the publisher name has already been read
public void processBookRecord()
{
// Reads the book record
bookRecord = getBookRecord();
// Try statement used to read records, create temporary record, and check publisher
try
{
// While statement that ends when there are no more records to read
while( bookRecord != null )
{
// If statement to check if publisher name has previously been read
if( !publisherList.contains( bookRecord.getPublisherName() ) )
{
// Creates a temporary record for the publisher name
StringBuffer tempRecord = new StringBuffer();
// Appends the publisher name to the temporary record
tempRecord.append( bookRecord.getPublisherName() );
// Appends an end of line marker to the temporary record
tempRecord.append( System.getProperty( "line.separator" ) );
// Outputs temporary record to PublisherList.txt file
outputPublisherList.write( tempRecord.toString().toCharArray() );
} // Ends if statement
// Reads the next book record
bookRecord = getBookRecord();
} // Ends while statement
} // Ends try statement
// Catch statement for bad format
catch( IllegalFormatException formatException )
{
// Prints error statement
System.err.println( "There was an error with the output." );
// Exits the program
System.exit( 1 );
} // Ends catch statement
// Catch statement for I/O errors
catch( IOException ioException )
{
// Prints error statement
System.err.println( "There was an error creating the file." );
// Exits the program
System.exit( 1 );
} // Ends catch statement
} // Ends method processBookRecord
// Method used to close text files
public void closeFiles()
{
// Try statement used to close the files
try
{
// If statement that closes BookRecords.txt file if it is not empty
if( inputBookRecord != null )
{
inputBookRecord.close();
} // Ends if statement
// If statement that closes PublisherList.txt file if it is not empty
if( outputPublisherList != null )
{
outputPublisherList.close();
} // Ends if statement
} // Ends try statement
// Catch statement for I/O errors
catch ( IOException ioException )
{
// Prints error message
System.err.println( "There was an error closing the files." );
// Exits the program
System.exit( 1 );
} // Ends catch statement
} // Ends method closeFiles
} // Ends class file ProcessBookRecords
And this is my code for the ProcessBookRecordsTest.java file:
public class ProcessBookRecordsTest
{
/**
* @param args the command line arguments
*/
public static void main(String[] args)
{
// Creates an application that will run the program
ProcessBookRecords application = new ProcessBookRecords();
// Calls method used to open files
application.openFiles();
// Calls method used to process records
application.processBookRecord();
// Calls method used to close files
application.closeFiles();
} // Ends main method
} // Ends main class file ProcessBookRecordsTest
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