compiler says class can't be initialized
ok, i know abstract classes can't be initialized, but i am extending my base class, but my complier says that "class ClassificationParser can't be initialized" but i am not initializing it. IF anyone can point out a problem, which i just can't see please do. Thank you..
first is listed the base abstract class, second the extended class
package cattlemanager.utilities.parsers;
import java.util.Vector;
import java.io.File;
import java.io.IOException;
/**
* Title:ClassificationParser
* Copyright:Copyright (c) 2001
* Company:None
* @author Harold Smith III
* @version 1.0
*/
publicabstractclass ClassificationParser
{
/**
* <p>This method returns the instance of a <code>Classification</code> objects
* that the implementor can work with and use to there own extent. This allows
* for the parser to read in all the file data, and insert it into the
* <code>Classification</code> Objects that he or she wishes the user to
* modify.</p>
*
* <p><strong>Important</strong> - The <code>Vector</code> that is returned will
* contain a <code>Vector</code> of <code>Vector</code>'s that the implementor
* must work with. The reason for a <code>Vector</code> of <code>Vector</code>'s
* is the <code>Classification</code> data may contain several past <code>
* Classification</code> records.</p>
*
* @return Vector the data vector.
*/
public Vector getData()
{return vInternalClassificationDataObject;
}
/**
* <code>parse</code> is the default parsing mechanism for the read in data
* that the user can integrate into there records. Using the <code>parse</code>
* method, the implemented class will read in the specified <code>File</code>
* and the <code>Classification</code> Objects will be initialized with tthe
* read in data.
*
* @param File the file to be parsed, should follow the specified format
* determined by the appropriate association.
*
* @throws WrongFormatException if the file is not formatted to the standards
* the association has laid out.
* @throws IOException if there is a file problem.
*/
publicabstractvoid parse(File fName)throws WrongFormatException, IOException;
/**
* The internal <code>Vector</code> of objects that will be laid out as specified
* in the <code>getData</code> method described within this class.
*
* @see #getData
*/
protected Vector vInternalClassificationDataObject;
}
package cattlemanager.utilities.parsers;
import java.io.File;
import java.io.FileInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.EOFException;
import java.util.StringTokenizer;
import java.util.Date;
import java.util.GregorianCalendar;
/**
* Title:HolsteinAssociationClassificationParser
* Copyright:Copyright (c) 2001
* Company:None
* @author Harold Smith III
* @version 1.0
*/
publicclass HolsteinAssociationClassificationParserextends ClassificationParser
{
private HolsteinAssociationClassificationParser()
{try
{ parse(new File("demo.ext"));
}
catch (Exception e)
{
}
}
/**
* Doesn't work?!
*/
publicstaticsynchronized ClassificationParser createInstance()
{returnnew HolsteinAssociationClassificationParser();
}
/**
* <code>parse</code> parses the <a href="www.holstein.com">Holstein
* Association</a> classification data as laid out in there <code>File</code>
* format. By using this parser, one can read in the records and access the
* data that they need.
*
* @param File the name of the file to be parsed.
* @throws WrongFormatException if the file is not properly formated
*/
privatevoid parse(File fName)throws WrongFormatException, IOException
{
try{
// READ IN FILE
}
/**
* Creates an instance of a date for the format specified by the Holstein
* Association
*/
private Date createDate(String time)
{ GregorianCalendar c = (GregorianCalendar) GregorianCalendar.getInstance();
c.set(Integer.parseInt(time.substring(0,4)), Integer.parseInt(time.substring(4,6))-1, Integer.parseInt(time.substring(6,8)));
return c.getTime();
}
}
