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
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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] and other commonly found units (e.g. 1 Kilobyte = 1024 Byte).
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 | Class
70 | 1 099 511 627 776 Byte
76 | 1 125 899 906 842 624 Byte
82 | 1 152 921 504 606 846 976 Byte
88 | 1 180 591 620 717 411 303 424 Byte
94 | 1 208 925 819 614 629 174 706 176 Byte
98 .Metric-prefixed units
100 | Name | Symbol | Exponential | Absolute
129 | 1 000 000 000 000 Byte
135 | 1 000 000 000 000 000 Byte
141 | 1 000 000 000 000 000 000 Byte
147 | 1 000 000 000 000 000 000 000 Byte
153 | 1 000 000 000 000 000 000 000 000 Byte
159 | Name | Symbol | Exponential | Absolute
188 | 1 099 511 627 776 Byte
194 | 1 125 899 906 842 624 Byte
200 | 1 152 921 504 606 846 976 Byte
206 | 1 180 591 620 717 411 303 424 Byte
212 | 1 208 925 819 614 629 174 706 176 Byte
216 === Development Status
218 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.
225 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.
230 Kilobyte unit = Kilobyte.valueOf(500) // 500 Byte or "0.50 kB"
231 Kibibyte unit = Kibibyte.valueOf(512) // 512 Byte or "0.50 KiB"
232 CommonKilobyte unit = CommonKilobyte.valueOf(512) // 500 Byte or "0.50 kB"
234 Megabyte unit = Megabyte.valueOf(1_000_000) // 1 000 000 Byte or "1.00 MB"
235 Mebibyte unit = Mebibyte.valueOf(1_048_576) // 1 048 576 Byte or "1.00 MiB"
236 CommonMegabyte unit = CommonMegabyte.valueOf(1_048_576) // 1 048 576 Byte or "1.00 MB"
238 // 'BigInteger' based
239 Kilobyte unit = Kilobyte.valueOf(BigInteger.valueOf(500)) // 500 Byte or "0.50 kB"
240 Kibibyte unit = Kibibyte.valueOf(BigInteger.valueOf(512)) // 512 Byte or "0.50 KiB"
241 CommonKilobyte unit = CommonKilobyte.valueOf(BigInteger.valueOf(512)) // 512 Byte or "0.50 KB"
243 Megabyte unit = Megabyte.valueOf(BigInteger.valueOf(1000000)) // 1 000 000 Byte or "1.00 MB"
244 Mebibyte unit = Mebibyte.valueOf(BigInteger.valueOf(1_048_576)) // 1 048 576 Byte or "1.00 MB"
245 CommonMegabyte unit = CommonMegabyte.valueOf(BigInteger.valueOf(1_048_576)) // 1 048 576 Byte or "1.00 MB"
248 The `StorageUnits` class offers two factory methods that automatically pick the best-matching unit for a given number of bytes.
250 ==== Binary-prefixed Units
255 StorageUnit<?> unit = StorageUnits.binaryValueOf(256) // Kibibyte (0.25 KiB)
256 StorageUnit<?> unit = StorageUnits.binaryValueOf(1048576) // Mebibyte (1.00 MiB)
258 // 'BigInteger' based
259 StorageUnit<?> unit = StorageUnits.binaryValueOf(BigInteger.valueOf(256)) // Kibibyte (0.25 MiB)
260 StorageUnit<?> unit = StorageUnits.binaryValueOf(BigInteger.valueOf(1048576)) // Mebibyte (1.00 MiB)
263 ==== Metric-prefixed Units
268 StorageUnit<?> unit = StorageUnits.metricValueOf(120000) // Kilobyte (120.00 kB)
269 StorageUnit<?> unit = StorageUnits.metricValueOf(1000000) // Megabyte (1.00 MB)
271 // 'BigInteger' based
272 StorageUnit<?> unit = StorageUnits.metricValueOf(BigInteger.valueOf(120000)) // Kilobyte (120.00 kB)
273 StorageUnit<?> unit = StorageUnits.metricValueOf(BigInteger.valueOf(1000000)) // Megabyte (1.00 MB)
281 StorageUnit<?> unit = StorageUnits.commonValueOf(256) // CommonKilobyte (0.25 kB)
282 StorageUnit<?> unit = StorageUnits.commonValueOf(1048576) // CommonMebibyte (1.00 MB)
284 // 'BigInteger' based
285 StorageUnit<?> unit = StorageUnits.commonValueOf(BigInteger.valueOf(256)) // CommonKilobyte (0.25 kB)
286 StorageUnit<?> unit = StorageUnits.commonValueOf(BigInteger.valueOf(1048576)) // CommonMebibyte (1.00 MB)
289 Additionally high-level factory methods are also available in the `StorageUnits` class.
293 import static de.xn__ho_hia.utils.storage_unit.StorageUnits.*;
295 Kibibyte unit = kibibyte(1) // 1 024 Byte
296 Mebibyte unit = mebibyte(1) // 1 048 576 Byte
297 Gibibyte unit = gibibyte(1) // 1 073 741 824 Byte
298 Tebibyte unit = tebibyte(1) // 1 099 511 627 776 Byte
299 Pebibyte unit = pebibyte(1) // 1 125 899 906 842 624 Byte
300 Exbibyte unit = exbibyte(1) // 1 152 921 504 606 846 976 Byte
301 Zebibyte unit = zebibyte(1) // 1 180 591 620 717 411 303 424 Byte
302 Yobibyte unit = yobibyte(1) // 1 208 925 819 614 629 174 706 176 Byte
304 Kilobyte unit = kilobyte(1) // 1 000 Byte
305 Megabyte unit = megabyte(1) // 1 000 000 Byte
306 Gigabyte unit = gigabyte(1) // 1 000 000 000 Byte
307 Terabyte unit = terabyte(1) // 1 000 000 000 000 Byte
308 Petabyte unit = petabyte(1) // 1 000 000 000 000 000 Byte
309 Exabyte unit = exabyte(1) // 1 000 000 000 000 000 000 Byte
310 Zettabyte unit = zettabyte(1) // 1 000 000 000 000 000 000 000 Byte
311 Yottabyte unit = yottabyte(1) // 1 000 000 000 000 000 000 000 000 Byte
313 CommonKilobyte unit = commonKilobyte(1) // 1 024 Byte
314 CommonMegabyte unit = commonMegabyte(1) // 1 048 576 Byte
315 CommonGigabyte unit = commonGigabyte(1) // 1 073 741 824 Byte
316 CommonTerabyte unit = commonTerabyte(1) // 1 099 511 627 776 Byte
317 CommonPetabyte unit = commonPetabyte(1) // 1 125 899 906 842 624 Byte
318 CommonExabyte unit = commonExabyte(1) // 1 152 921 504 606 846 976 Byte
319 CommonZettabyte unit = commonZettabyte(1) // 1 180 591 620 717 411 303 424 Byte
320 CommonYottabyte unit = commonYottabyte(1) // 1 208 925 819 614 629 174 706 176 Byte
323 === Add, Subtract, Multiply, Divide
325 Each unit implements the basic four math operations. All operations retain their original type, e.g. `[Kilobyte] + [Megabyte] = [Kilobyte]`
329 import static de.xn__ho_hia.utils.storage_unit.StorageUnits.*;
331 kilobyte(4).add(kilobyte(8)) // 4 Kilobyte + 8 Kilobyte = 12 Kilobyte = 12 000 Byte
332 kibibyte(1).add(1024) // 1 Kibibyte + 1 024 Byte = 2 Kibibyte = 2 048 Byte
333 kibibyte(1).subtract(24) // 1 024 Byte - 24 Byte = 1 000 Byte
334 megabyte(5).subtract(kilobyte(500)) // 5 Megabyte - 500 Kilobyte = 4.5 Megabyte = 4 500 Kilobyte = 4 500 000 Byte
335 gigabyte(1).multiply(5) // 1 Gigabyte times 5 = 5 Gigabyte
336 terabyte(1).divide(5) // 1 Terabyte divided by 5 = 0.2 Terabyte = 200 Gigabyte
339 === Comparison & Equality
341 Each unit is comparable to each other unit.
345 import static de.xn__ho_hia.utils.storage_unit.StorageUnits.*;
347 kibibyte(1024).compareTo(mebibyte(1)) == 0 // true
348 kibibyte(1000).compareTo(mebibyte(1)) == 0 // false
349 petabyte(3).compareTo(terabyte(3000)) == 0 // true
351 megabyte(1000).equals(gigabyte(1)) // true
352 megabyte(1024).equals(gigabyte(1)) // false
353 terabyte(12).equals(gigabyte(12000)) // true
358 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.
362 import static de.xn__ho_hia.utils.storage_unit.StorageUnits.*;
364 // default pattern '0.00'
365 terabyte(2).toString() // "2.00 TB"
366 gigabyte(1).add(megabyte(200)).toString() // "1.20 GB"
367 petabyte(1).subtract(terabyte(250)).toString() // "0.75 PB"
369 // use custom pattern
370 kilobyte(212345).toString("0.0") // "212345.0 kB"
371 gibibyte(2123458).asTebibyte().toString("#,###.000") // "2,073.689 TiB"
372 kilobyte(120).asMegabyte().add(gigabyte(1)).toString("#,##0.00000") // "1,000.12000 MB"
374 // use custom pattern with specific Locale
375 kilobyte(212345).toString("0.0", Locale.GERMAN) // "212345,0 kB"
376 gibibyte(2123458).asTebibyte().toString("#,###.000", Locale.GERMAN) // "2.073,689 TiB"
379 Format customFormat = new DecimalFormat("#.00000");
380 terabyte(4).asTebibyte().toString(customFormat) // "3.63798 TiB"
382 // without creating unit type first
383 long numberOfBytes = 1_000_000_000_000_000L;
384 formatAsPetabyte(numberOfBytes) // "1.00 PB"
385 formatAsTerabyte(numberOfBytes) // "1000.00 TB"
386 formatAsPebibyte(numberOfBytes) // "0.89 PiB"
388 // use custom pattern
389 formatAsTerabyte(numberOfBytes, "#0.#####") // "1000 TB"
390 formatAsPebibyte(numberOfBytes, "#0.#####") // "0.88818 PiB"
392 // use custom pattern with specific Locale
393 formatAsTerabyte(numberOfBytes, "#0.#####", Locale.GERMAN) // "1000 TB"
394 formatAsPebibyte(numberOfBytes, "#0.#####", Locale.GERMAN) // "0,88818 PiB"
397 formatAsTerabyte(numberOfBytes, customFormat) // "1000.00000 TB"
398 formatAsPebibyte(numberOfBytes, customFormat) // ".88818 PiB"
403 Each unit can be converted to each other unit without loss of information.
407 import static de.xn__ho_hia.utils.storage_unit.StorageUnits.*;
409 Megabyte unit = kilobyte(1000).asMegabyte() // "1.00 MB"
410 Kilobyte unit = gigabyte(12).asKilobyte() // "12000000.00 kB"
411 Gigabyte unit = terabyte(1).asGigabyte() // "1000.00 GB"
413 // convert to best-match
414 kilobyte(1100).asBestMatchingUnit() // "1.10 MB"
415 kilobyte(1100).asBestMatchingBinaryUnit() // "1.50 MiB"
416 kilobyte(1100).asBestMatchingMetricUnit() // "1.10 MB"
419 Each unit can be expressed as a fraction of another unit (precise up to 24 decimal places)
423 import static de.xn__ho_hia.utils.storage_unit.StorageUnits.*;
425 BigDecimal kilobytes = megabyte(1).inKilobyte() // 1 000
426 BigDecimal bytes = kibibyte(2).inByte() // 2 048
427 BigDecimal terabytes = gigabyte(15).inTerabyte() // 0.015
432 To use this project just declare the following dependency inside your POM:
434 [source,xml,subs="attributes,verbatim"]
438 <groupId>{project-group}</groupId>
439 <artifactId>{project-name}</artifactId>
440 <version>${version.storage-units}</version>
445 Replace `${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].
449 This project is compatible with the following Java versions:
453 | | 1.X.Y | 2.X.Y | 3.X.Y
468 Originally inspired by link:https://github.com/twitter/util#space[Twitters util] package.
472 * link:https://github.com/JakeWharton/byteunits[Byte Units]
476 To the extent possible under law, the author(s) have dedicated all copyright
477 and related and neighboring rights to this software to the public domain
478 worldwide. This software is distributed without any warranty.
480 You should have received a copy of the CC0 Public Domain Dedication along
481 with this software. If not, see http://creativecommons.org/publicdomain/zero/1.0/.
485 * https://github.com/sebhoss/{project-name}
486 * https://bitbucket.org/sebhoss/{project-name}
487 * https://gitlab.com/sebastian.hoss/{project-name}
488 * http://v2.pikacode.com/sebhoss/{project-name}
489 * http://repo.or.cz/{project-name}.git