display Bytes Size : File Size « File Input Output « Java





display Bytes Size

      
/*
 * @(#)$Id: StringUtils.java 3619 2008-03-26 07:23:03Z yui $
 *
 * Copyright 2006-2008 Makoto YUI
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * Contributors:
 *     Makoto YUI - initial implementation
 */
//package xbird.util.string;


/**
 * 
 * <DIV lang="en"></DIV>
 * <DIV lang="ja"></DIV>
 * 
 * @author Makoto YUI (yuin405+xbird@gmail.com)
 */
public final class StringUtils {

    private static final float KBYTES = 1024f;
    private static final float MBYTES = KBYTES * KBYTES;
    private static final float GBYTES = MBYTES * KBYTES;

    public static String displayBytesSize(final long n) {
        final String size;
        final long abs = Math.abs(n);
        if(abs < KBYTES) {
            size = n + " bytes";
        } else if(abs < MBYTES) {
            size = String.format("%.2f", n / KBYTES) + " kB";
        } else if(abs < GBYTES) {
            size = String.format("%.2f", n / MBYTES) + " MB";
        } else {
            return String.format("%.2f", n / GBYTES) + " GB";
        }
        return size;
    }
}

   
    
    
    
    
    
  










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