utils.java

JBother是纯Java开发的Jabber(即时消息开源软件)客户端。支持群组聊天

/*
 Copyright (C) 2003 Adam Olsen

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 1, or (at your option)
 any later version.

 This program 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 General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

package com.valhalla.jbother;

import java.io.File;

/**
 * A class to contain information about different file extensions used in
 * JBother
 * 
 * @author Adam Olsen
 * @version 1.0
 */
class Utils {

    public final static String html = "html";

    public final static String gcb = "gcb";
    
    public final static String log = "log";

    /**
     * Get the extension of a file.
     * 
     * @param f
     *            the file to get the extension of
     * @return the extension of the file
     */
    public static String getExtension(File f) {
        String ext = null;
        String s = f.getName();
        int i = s.lastIndexOf('.');

        if (i > 0 && i < s.length() - 1) {
            ext = s.substring(i + 1).toLowerCase();
        }
        return ext;
    }
}