1 = Storage-Units image:https://img.shields.io/badge/email-%40metio-brightgreen.svg?style=social&label=mail["Discuss on Google Groups", link="https://groups.google.com/forum/#!forum/metio"] image:https://img.shields.io/badge/irc-%23metio.wtf-brightgreen.svg?style=social&label=IRC["Chat on IRC", link="http://webchat.freenode.net/?channels=metio.wtf"]
2 Sebastian Hoß <https://github.com/sebhoss[@sebhoss]>
4 :project-name: storage-units
5 :project-group: de.xn--ho-hia.utils.storage_units
6 :coverity-project: 2658
7 :codacy-project: d3cfbbc415c14b79a661d573ac11e68c
9 :toc-placement: preamble
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25 https://www.java.com[Java] library for storage units according to link:http://en.wikipedia.org/wiki/ISO/IEC_80000[ISO IEC 80000-13:2008].
29 * Immutable, type- and thread-safe object model for storage units
30 * Convenience factories to create units
31 * Basic arithmetic operators
32 * Comparisons and equality checks between units
33 * Lossless conversion between all units
34 * Human readable text format, including custom formats
35 * Compatible with any `java.lang.Number`
39 .Binary-prefixed units
41 | Name | Symbol | Exponential | Absolute
66 | 1 099 511 627 776 Byte
71 | 1 125 899 906 842 624 Byte
76 | 1 152 921 504 606 846 976 Byte
81 | 1 180 591 620 717 411 303 424 Byte
86 | 1 208 925 819 614 629 174 706 176 Byte
89 .Metric-prefixed units
91 | Name | Symbol | Exponential | Absolute
116 | 1 000 000 000 000 Byte
121 | 1 000 000 000 000 000 Byte
126 | 1 000 000 000 000 000 000 Byte
131 | 1 000 000 000 000 000 000 000 Byte
136 | 1 000 000 000 000 000 000 000 000 Byte
139 === Development Status
141 All units according to ISO IEC 80000-13:2008 are implemented. There are some future ideas, take a look at the link:https://github.com/sebhoss/storage-units/issues[open tickets] in case you are interested. Apart from that, this project is in maintenance mode.
148 Each unit implements a Byte-based static factory method (`valueOf(BigInteger)` or `valueOf(long)`) that can be used to represent a given number of bytes in a specific unit.
153 Kilobyte unit = Kilobyte.valueOf(2500) // 2 500 Byte or "2.50 kB"
154 Kibibyte unit = Kibibyte.valueOf(512) // 512 Byte or "0.50 KiB"
155 Megabyte unit = Megabyte.valueOf(1000000) // 1 000 000 Byte or "1.00 MB"
157 // 'BigInteger' based
158 Kilobyte unit = Kilobyte.valueOf(BigInteger.valueOf(2500)) // 2 500 Byte or "2.50 kB"
159 Kibibyte unit = Kibibyte.valueOf(BigInteger.valueOf(512)) // 512 Byte or "0.50 KiB"
160 Megabyte unit = Megabyte.valueOf(BigInteger.valueOf(1000000)) // 1 000 000 Byte or "1.00 MB"
163 The `StorageUnits` class offers two factory methods that automatically pick the best-matching unit for a given number of bytes.
170 StorageUnit<?> unit = StorageUnits.binaryValueOf(256) // Kibibyte (0.25 KiB)
171 StorageUnit<?> unit = StorageUnits.binaryValueOf(1048576) // Mebibyte (1.00 MiB)
173 // 'BigInteger' based
174 StorageUnit<?> unit = StorageUnits.binaryValueOf(BigInteger.valueOf(256)) // Kibibyte (0.25 MiB)
175 StorageUnit<?> unit = StorageUnits.binaryValueOf(BigInteger.valueOf(1048576)) // Mebibyte (1.00 MiB)
183 StorageUnit<?> unit = StorageUnits.metricValueOf(120000) // Kilobyte (120.00 kB)
184 StorageUnit<?> unit = StorageUnits.metricValueOf(1000000) // Megabyte (1.00 MB)
186 // 'BigInteger' based
187 StorageUnit<?> unit = StorageUnits.metricValueOf(BigInteger.valueOf(120000)) // Kilobyte (120.00 kB)
188 StorageUnit<?> unit = StorageUnits.metricValueOf(BigInteger.valueOf(1000000)) // Megabyte (1.00 MB)
191 Additionally high-level factory methods are also available in the `StorageUnits` class.
195 Kibibyte unit = StorageUnits.kibibyte(1) // 1 024 Byte
196 Mebibyte unit = StorageUnits.mebibyte(1) // 1 048 576 Byte
197 Gibibyte unit = StorageUnits.gibibyte(1) // 1 073 741 824 Byte
198 Tebibyte unit = StorageUnits.tebibyte(1) // 1 099 511 627 776 Byte
199 Pebibyte unit = StorageUnits.pebibyte(1) // 1 125 899 906 842 624 Byte
200 Exbibyte unit = StorageUnits.exbibyte(1) // 1 152 921 504 606 846 976 Byte
201 Zebibyte unit = StorageUnits.zebibyte(1) // 1 180 591 620 717 411 303 424 Byte
202 Yobibyte unit = StorageUnits.yobibyte(1) // 1 208 925 819 614 629 174 706 176 Byte
204 Kilobyte unit = StorageUnits.kilobyte(1) // 1 000 Byte
205 Megabyte unit = StorageUnits.megabyte(1) // 1 000 000 Byte
206 Gigabyte unit = StorageUnits.gigabyte(1) // 1 000 000 000 Byte
207 Terabyte unit = StorageUnits.terabyte(1) // 1 000 000 000 000 Byte
208 Petabyte unit = StorageUnits.petabyte(1) // 1 000 000 000 000 000 Byte
209 Exabyte unit = StorageUnits.exabyte(1) // 1 000 000 000 000 000 000 Byte
210 Zettabyte unit = StorageUnits.zettabyte(1) // 1 000 000 000 000 000 000 000 Byte
211 Yottabyte unit = StorageUnits.yottabyte(1) // 1 000 000 000 000 000 000 000 000 Byte
214 === Add, Subtract, Multiply, Divide
216 Each unit implements the basic four math operations. All operations retain their original type, e.g. `[Kilobyte] + [Megabyte] = [Kilobyte]`
220 kilobyte(4).add(kilobyte(8)) // 4 Kilobyte + 8 Kilobyte = 12 Kilobyte = 12 000 Byte
221 kibibyte(1).add(1024) // 1 Kibibyte + 1 024 Byte = 2 Kibibyte = 2 048 Byte
222 kibibyte(1).subtract(24) // 1 024 Byte - 24 Byte = 1 000 Byte
223 megabyte(5).subtract(kilobyte(500)) // 5 Megabyte - 500 Kilobyte = 4.5 Megabyte = 4 500 Kilobyte = 4 500 000 Byte
224 gigabyte(1).multiply(5) // 1 Gigabyte times 5 = 5 Gigabyte
225 terabyte(1).divide(5) // 1 Terabyte divided by 5 = 0.2 Terabyte = 200 Gigabyte
228 === Comparison & Equality
230 Each unit is comparable to each other unit.
234 kibibyte(1024).compareTo(mebibyte(1)) == 0 // true
235 kibibyte(1000).compareTo(mebibyte(1)) == 0 // false
236 petabyte(3).compareTo(terabyte(3000)) == 0 // true
238 megabyte(1000).equals(gigabyte(1)) // true
239 megabyte(1024).equals(gigabyte(1)) // false
240 terabyte(12).equals(gigabyte(12000)) // true
245 Each unit prints a human-readable string, representing the amount of bytes in the given unit using the symbol specified in ISO IEC 80000-13:2008.
249 import static de.xn__ho_hia.utils.storage_unit.StorageUnits.*;
251 // default pattern '0.00'
252 terabyte(2).toString() // "2.00 TB"
253 gigabyte(1).add(megabyte(200)).toString() // "1.20 GB"
254 petabyte(1).subtract(terabyte(250)).toString() // "0.75 PB"
256 // use custom pattern
257 kilobyte(212345).toString("0.0") // "212345.0 kB"
258 gibibyte(2123458).asTebibyte().toString("#,###.000") // "2,073.689 TiB"
259 kilobyte(120).asMegabyte().add(gigabyte(1)).toString("#,##0.00000") // "1,000.12000 MB"
261 // use custom pattern with specific Locale
262 kilobyte(212345).toString("0.0", Locale.GERMAN) // "212345,0 kB"
263 gibibyte(2123458).asTebibyte().toString("#,###.000", Locale.GERMAN) // "2.073,689 TiB"
266 Format customFormat = new DecimalFormat("#.00000");
267 terabyte(4).asTebibyte().toString(customFormat) // "3.63798 TiB"
269 // without creating unit type first
270 long numberOfBytes = 1_000_000_000_000_000L;
271 formatAsPetabyte(numberOfBytes) // "1.00 PB"
272 formatAsTerabyte(numberOfBytes) // "1000.00 TB"
273 formatAsPebibyte(numberOfBytes) // "0.89 PiB"
275 // use custom pattern
276 formatAsTerabyte(numberOfBytes, "#0.#####") // "1000 TB"
277 formatAsPebibyte(numberOfBytes, "#0.#####") // "0.88818 PiB"
279 // use custom pattern with specific Locale
280 formatAsTerabyte(numberOfBytes, "#0.#####", Locale.GERMAN) // "1000 TB"
281 formatAsPebibyte(numberOfBytes, "#0.#####", Locale.GERMAN) // "0,88818 PiB"
284 formatAsTerabyte(numberOfBytes, customFormat) // "1000.00000 TB"
285 formatAsPebibyte(numberOfBytes, customFormat) // ".88818 PiB"
290 Each unit can be converted to each other unit without loss of information.
294 Megabyte unit = kilobyte(1000).asMegabyte() // "1.00 MB"
295 Kilobyte unit = gigabyte(12).asKilobyte() // "12000000.00 kB"
296 Gigabyte unit = terabyte(1).asGigabyte() // "1000.00 GB"
299 Each unit can be expressed as a fraction of another unit (precise up to 24 decimal places)
303 BigDecimal kilobytes = megabyte(1).inKilobyte() // 1 000
304 BigDecimal bytes = kibibyte(2).inByte() // 2 048
305 BigDecimal terabytes = gigabyte(15).inTerabyte() // 0.015
310 To use this project just declare the following dependency inside your POM:
312 [source,xml,subs="attributes,verbatim"]
316 <groupId>{project-group}</groupId>
317 <artifactId>{project-name}</artifactId>
318 <version>${version.storage-units}</version>
323 Replace `${version.storage-units}` with the link:++http://search.maven.org/#search%7Cga%7C1%7Cg%3Ade.xn--ho-hia.utils.storage_units%20a%3Astorage-units++[latest release]. This project follows the link:http://semver.org/[semantic versioning guidelines].
327 This project is compatible with the following Java versions:
331 | | 1.X.Y | 2.X.Y | 3.X.Y
346 Originally inspired by link:https://github.com/twitter/util#space[Twitters util] package.
350 To the extent possible under law, the author(s) have dedicated all copyright
351 and related and neighboring rights to this software to the public domain
352 worldwide. This software is distributed without any warranty.
354 You should have received a copy of the CC0 Public Domain Dedication along
355 with this software. If not, see http://creativecommons.org/publicdomain/zero/1.0/.
359 * https://github.com/sebhoss/{project-name}
360 * https://bitbucket.org/sebhoss/{project-name}
361 * https://gitlab.com/sebastian.hoss/{project-name}
362 * http://v2.pikacode.com/sebhoss/{project-name}
363 * http://repo.or.cz/{project-name}.git