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/*
* Copyright (C) 2001-2003 Colin Bell
* colbell@users.sourceforge.net
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
import java.io.*;
import java.text.NumberFormat;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* General purpose utilities functions.
*
* @author <A HREF="mailto:colbell@users.sourceforge.net">Colin Bell</A>
*/
public class Utilities
{
/**
* Return the suffix of the passed file name.
*
* @param fileName File name to retrieve suffix for.
*
* @return Suffix for <TT>fileName</TT> or an empty string
* if unable to get the suffix.
*
* @throws IllegalArgumentException if <TT>null</TT> file name passed.
*/
public static String getFileNameSuffix(String fileName)
{
if (fileName == null)
{
throw new IllegalArgumentException("file name == null");
}
int pos = fileName.lastIndexOf('.');
if (pos > 0 && pos < fileName.length() - 1)
{
return fileName.substring(pos + 1);
}
return "";
}
}
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