/** * $RCSfile: ByteFormat.java,v $ * $Revision: 1.3 $ * $Date: 2003/01/09 06:05:32 $ * * Copyright (C) 1999-2002 Jive Software. All rights reserved. * * This software is the proprietary information of Jive Software. Use is subject to license terms. */package com.struts2.framework.util;import java.text.*;/** * A formatter for formatting byte sizes. For example, formatting 12345 byes results in * "12.1 K" and 1234567 results in "1.18 MB". * * @author Bill Lynch */public class ByteFormat extends Format {//    private long numBytes = 0;    public ByteFormat() {}//    public ByteFormat(int numBytes) {//        this.numBytes = numBytes;//    }////    public long getNumBytes() {//        return numBytes;//    }////    public void setNumBytes(long numBytes) {//        this.numBytes = numBytes;//    }    // Implemented from the Format class    /**     * Formats a long which represent a number of bytes.     */    public String format(long bytes) {        return format(new Long(bytes));    }    /**     * Formats a long which represent a number of kilobytes.     */    public String formatKB(long kilobytes) {        return format(new Long(kilobytes*1024));    }    /**     * Format the given object (must be a Long).     *     * @param obj assumed to be the number of bytes as a Long.     * @param buf the StringBuffer to append to.     * @param pos     * @return A formatted string representing the given bytes in more human-readable form.     */    public StringBuffer format(Object obj, StringBuffer buf, FieldPosition pos) {        if (obj instanceof Long) {            long numBytes = ((Long)obj).longValue();            if (numBytes < 1024*1024) {                DecimalFormat formatter = new DecimalFormat("#,##0.0");                buf.append(formatter.format((double)numBytes/1024.0)).append(" K");            }            else {                DecimalFormat formatter = new DecimalFormat("#,##0.0");                buf.append(formatter.format((double)numBytes/(1024.0*1024.0))).append(" MB");            }        }        return buf;    }    /**     * In this implementation, returns null always.     * @param source     * @param pos     * @return returns null in this implementation.     */    public Object parseObject(String source, ParsePosition pos) {        return null;    }}