Java Locale Format formatBytes(final long bytes)

Description

Pretty output of bytes, "1023 bytes", "1.1 kb", "523 kb", "1.7 Mb", "143 Gb" etc.

License

Open Source License

Parameter

Parameter	Description
bytes	a parameter

Declaration

public static String formatBytes(final long bytes) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.math.BigDecimal;

import java.text.NumberFormat;

import java.util.Locale;

public class Main {
    public static final int KILO_BYTES = 1024;
    public static final BigDecimal KB_BD = new BigDecimal(KILO_BYTES);
    public static final int MEGA_BYTES = KILO_BYTES * 1024;
    public static final BigDecimal MB_BD = new BigDecimal(MEGA_BYTES);
    public static final int GIGA_BYTES = MEGA_BYTES * 1024;
    public static final BigDecimal GB_BD = new BigDecimal(GIGA_BYTES);

    /**/*from   ww  w . j a  v a2 s . co  m*/
     * Pretty output of bytes, "1023 bytes", "1.1 kb", "523 kb", "1.7 Mb", "143
     * Gb" etc.
     * 
     * @param bytes
     * @return
     */
    public static String formatBytes(final long bytes) {
        if (bytes < KILO_BYTES) {
            return String.valueOf(bytes) + " bytes";
        }
        if (bytes < MEGA_BYTES) {
            BigDecimal no = new BigDecimal(bytes).divide(KB_BD, 1, BigDecimal.ROUND_HALF_UP);
            if (no.longValue() >= 100) {
                no = no.setScale(0, BigDecimal.ROUND_HALF_UP);
            }
            return NumberFormat.getInstance(Locale.getDefault()).format(no) + " kb";
        }
        if (bytes < GIGA_BYTES) {
            BigDecimal no = new BigDecimal(bytes).divide(MB_BD, 1, BigDecimal.ROUND_HALF_UP);
            if (no.longValue() >= 100) {
                no = no.setScale(0, BigDecimal.ROUND_HALF_UP);
            }
            return NumberFormat.getInstance(Locale.getDefault()).format(no) + " Mb";
        }
        BigDecimal no = new BigDecimal(bytes).divide(GB_BD, 1, BigDecimal.ROUND_HALF_UP);
        if (no.longValue() >= 100) {
            no = no.setScale(0, BigDecimal.ROUND_HALF_UP);
        }
        return NumberFormat.getInstance(Locale.getDefault()).format(no) + " Gb";
    }
}

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6. formatBytes(long byteCount, Locale locale)
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