fileutils.java

jworks program

package org.softme.util;

/* ====================================================================
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 * reserved.
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 * modification, are permitted provided that the following conditions
 * are met:
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 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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/**
 * Common {@link java.io.File} manipulation routines.
 *
 * @author <a href="mailto:[e-mail]">Daniel Rall</a>
 * @version $Id: FileUtils.java,v 1.1.1.1 2004/08/20 05:57:58 brokendoor Exp $
 */
public class FileUtils
{
    /**
     * The number of bytes in a kilobyte.
     */
    public static final int ONE_KB = 1024;

    /**
     * The number of bytes in a megabyte.
     */
    public static final int ONE_MB = ONE_KB * ONE_KB;

    /**
     * The number of bytes in a gigabyte.
     */
    public static final int ONE_GB = ONE_KB * ONE_MB;

    /**
     * Returns a human-readable version of the file size (original is in
     * bytes).
     *
     * @param size The number of bytes.
     * @return     A human-readable display value (includes units).
     */
    public static String byteCountToDisplaySize(int size)
    {
        String displaySize;

        if (size / ONE_GB > 0)
        {
            displaySize = String.valueOf(size / ONE_GB) + " GB";
        }
        else if (size / ONE_MB > 0)
        {
            displaySize = String.valueOf(size / ONE_MB) + " MB";
        }
        else if (size / ONE_KB > 0)
        {
            displaySize = String.valueOf(size / ONE_KB) + " kB";
        }
        else
        {
            displaySize = String.valueOf(size) + " bytes";
        }

        return displaySize;
    }
}