Java File Size Readable Format formatSize(StringBuilder builder, Long size)

Description

format Size

License

Open Source License

Declaration

private static StringBuilder formatSize(StringBuilder builder, Long size) 

Method Source Code

//package com.java2s;
/*//from   w w  w.ja v  a 2s .  c o m
 * JBoss, Home of Professional Open Source.
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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.
 */

public class Main {
    private static StringBuilder formatSize(StringBuilder builder, Long size) {
        if (size == null) {
            builder.append("???");
            return builder;
        }
        int n = 1024 * 1024 * 1024;
        int type = 0;
        while (size < n && n >= 1024) {
            n /= 1024;
            type++;
        }

        long top = (size * 100) / n;
        long bottom = top % 100;
        top /= 100;

        builder.append(top);
        if (bottom > 0) {
            builder.append(".").append(bottom / 10);
            bottom %= 10;
            if (bottom > 0) {
                builder.append(bottom);
            }

        }

        switch (type) {
        case 0:
            builder.append(" GB");
            break;
        case 1:
            builder.append(" MB");
            break;
        case 2:
            builder.append(" KB");
            break;
        }

        return builder;
    }
}

Related

1. FormatSize(long size)
2. formatSize(Long size)
3. formatSize(long size)
4. formatSize(long v)
5. formatSize(String strSize)
6. formatSizeInBytes(int size)
7. formatSpaceUsage(long size)
8. formatToolBarDisplay(String text, int size)
9. getFileSizeInByte(File file)