// Fig. 14.20: ReadSequentialFile.java
// This program reads a file of objects sequentially
// and displays each record.
import java.io.EOFException;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import com.deitel.jhtp6.ch14.AccountRecordSerializable;
public class ReadSequentialFile
{
private ObjectInputStream input;
// enable user to select file to open
public void openFile()
{
try // open file
{
input = new ObjectInputStream(
new FileInputStream( "clients.ser" ) );
} // end try
catch ( IOException ioException )
{
System.err.println( "Error opening file." );
} // end catch
} // end method openFile
// read record from file
public void readRecords()
{
AccountRecordSerializable record;
System.out.printf( "%-10s%-12s%-12s%10s\n", "Account",
"First Name", "Last Name", "Balance" );
try // input the values from the file
{
while ( true )
{
record = ( AccountRecordSerializable ) input.readObject();
// display record contents
System.out.printf( "%-10d%-12s%-12s%10.2f\n",
record.getAccount(), record.getFirstName(),
record.getLastName(), record.getBalance() );
} // end while
} // end try
catch ( EOFException endOfFileException )
{
return; // end of file was reached
} // end catch
catch ( ClassNotFoundException classNotFoundException )
{
System.err.println( "Unable to create object." );
} // end catch
catch ( IOException ioException )
{
System.err.println( "Error during reading from file." );
} // end catch
} // end method readRecords
// close file and terminate application
public void closeFile()
{
try // close file and exit
{
if ( input != null )
input.close();
System.exit( 0 );
} // end try
catch ( IOException ioException )
{
System.err.println( "Error closing file." );
System.exit( 1 );
} // end catch
} // end method closeFile
} // end class ReadSequentialFile
/*************************************************************************
* (C) Copyright 1992-2005 by Deitel & Associates, Inc. and *
* Pearson Education, Inc. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
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