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https://github.com/linktosriram/kext4j

Kotlin Extension Functions for Java
https://github.com/linktosriram/kext4j
java java-library kotlin kotlin-extensions
Last synced: 5 days ago
JSON representation
Kotlin Extension Functions for Java
Host: GitHub
URL: https://github.com/linktosriram/kext4j
Owner: linktosriram
License: mit
Created: 2019-08-03T20:03:16.000Z (over 5 years ago)
Default Branch: master
Last Pushed: 2023-12-15T08:47:30.000Z (11 months ago)
Last Synced: 2024-04-17T14:08:22.097Z (7 months ago)
Topics: java, java-library, kotlin, kotlin-extensions
Language: Java
Homepage:
Size: 102 KB
Stars: 0
Watchers: 2
Forks: 0
Open Issues: 1
Metadata Files:
- Readme: README.md
- License: LICENSE
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README

        [![Build Status](https://travis-ci.com/linktosriram/kext4j.svg?branch=master)](https://travis-ci.com/linktosriram/kext4j)

# kext4j

Kotlin Extension Functions for Java.

Implementation of kotlin extension methods for Java.

Currently in-progress:

* https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html

## Provided functions

### StringUtils

* [indices](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/indices.html)

* [lastIndex](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/last-index.html)

* [all](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/all.html)

* [any](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/any.html)

* [asIterable](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/as-iterable.html)

* [asSequence](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/as-sequence.html)

* [byteInputStream](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.io/byte-input-stream.html)

* [capitalize](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/capitalize.html)

* [chunked](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/chunked.html)

* [commonPrefixWith](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/common-prefix-with.html)

* [commonSuffixWith](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/common-suffix-with.html)

* [contains](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/contains.html)

* [count](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/count.html)

* [decapitalize](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/decapitalize.html)

* [drop](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/drop.html)

* [dropLast](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/drop-last.html)

* [dropLastWhile](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/drop-last-while.html)

* [dropWhile](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/drop-while.html)

* [elementAtOrElse](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/element-at-or-else.html)

* [elementAtOrNull](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/element-at-or-null.html)

* [endsWith](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/ends-with.html)

* [filter](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/filter.html)

* [filterIndexed](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/filter-indexed.html)

* [filterIndexedTo](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/filter-indexed-to.html)

* [filterNot](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/filter-not.html)

* [filterNotTo](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/filter-not-to.html)

* [filterTo](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/filter-to.html)

* [find](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/find.html)

* [findAnyOf](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/find-any-of.html)

* [findLast](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/find-last.html)

* [findLastAnyOf](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/find-last-any-of.html)

* [first](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/first.html)

* [firstOrNull](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/first-or-null.html)

* [flatMap](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/flat-map.html)

* [flatMapTo](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/flat-map-to.html)

* [fold](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/fold.html)

* [foldIndexed](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/fold-indexed.html)

* [foldRight](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/fold-right.html)

* [foldRightIndexed](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/fold-right-indexed.html)

* [forEach](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/for-each.html)

* [forEachIndexed](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/for-each-indexed.html)

* [getOrElse](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/get-or-else.html)

* [getOrNull](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/get-or-null.html)

* [groupBy](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/group-by.html)

* [groupByTo](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/group-by-to.html)

* [hasSurrogatePairAt](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/has-surrogate-pair-at.html)

* [ifBlank](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/if-blank.html)

* [ifEmpty](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/if-empty.html)

* [indexOf](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/index-of.html)

* [indexOfAny](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/index-of-any.html)

* [indexOfFirst](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/index-of-first.html)

* [indexOfLast](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/index-of-last.html)

* [isBlank](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/is-blank.html)

* [isEmpty](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/is-empty.html)

* [isNotBlank](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/is-not-blank.html)

* [isNotEmpty](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/is-not-empty.html)

* [isNullOrBlank](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/is-null-or-blank.html)

* [isNullOrEmpty](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/is-null-or-empty.html)

* [iterator](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/iterator.html)

* [last](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/last.html)

* [lastIndexOf](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/last-index-of.html)

* [lastIndexOfAny](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/last-index-of-any.html)

* [lastOrNull](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/last-or-null.html)

* [lines](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/lines.html)

* [lineSequence](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/line-sequence.html)

* [map](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/map.html)

* [mapIndexed](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/map-indexed.html)

* [mapIndexedNotNull](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/map-indexed-not-null.html)

* [mapIndexedNotNullTo](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/map-indexed-not-null-to.html)

* [mapIndexedTo](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/map-indexed-to.html)

* [mapNotNull](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/map-not-null.html)

* [mapNotNullTo](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/map-not-null-to.html)

* [mapTo](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/map-to.html)

* [max](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/max.html)

* [maxBy](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/max-by.html)

* [maxWith](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/max-with.html)

* [min](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/min.html)

* [minBy](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/min-by.html)

* [minWith](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/min-with.html)

* [none](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/none.html)

* [onEach](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/on-each.html)

* [orEmpty](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/or-empty.html)

* [padEnd](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/pad-end.html)

* [padStart](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/pad-start.html)

* [partition](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/partition.html)

* [prependIndent](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/prepend-indent.html)

* [random](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/random.html)

* [reader](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.io/reader.html)

* [reduce](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/reduce.html)

* [reduceIndexed](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/reduce-indexed.html)

* [reduceRight](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/reduce-right.html)

* [reduceRightIndexed](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/reduce-right-indexed.html)

* [regionMatches](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/region-matches.html)

* [removePrefix](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/remove-prefix.html)

* [removeRange](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/remove-range.html)

* [removeSuffix](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/remove-suffix.html)

* [removeSurrounding](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/remove-surrounding.html)

* [replace](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/replace.html)

* [replaceAfter](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/replace-after.html)

* [replaceAfterLast](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/replace-after-last.html)

* [replaceBefore](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/replace-before.html)

* [replaceBeforeLast](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/replace-before-last.html)

* [replaceFirst](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/replace-first.html)

* [replaceIndent](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/replace-indent.html)

* [replaceIndentByMargin](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/replace-indent-by-margin.html)

* [replaceRange](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/replace-range.html)

* [reversed](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/reversed.html)

* [single](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/single.html)

* [singleOrNull](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/single-or-null.html)

* [slice](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/slice.html)

* [split](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/split.html)

* [splitToSequence](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/split-to-sequence.html)

* [startsWith](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/starts-with.html)

* [subSequence](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/sub-sequence.html)

* [substring](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/substring.html)

* [substringAfter](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/substring-after.html)

* [substringAfterLast](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/substring-after-last.html)

* [substringBefore](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/substring-before.html)

* [substringBeforeLast](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/substring-before-last.html)

* [sumBy](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/sum-by.html)

* [sumByDouble](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/sum-by-double.html)

* [take](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/take.html)

* [takeLast](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/take-last.html)

* [takeLastWhile](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/take-last-while.html)

* [takeWhile](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/take-while.html)

* [toBigDecimal](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-big-decimal.html)

* [toBigDecimalOrNull](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-big-decimal-or-null.html)

* [toBigInteger](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-big-integer.html)

* [toBigIntegerOrNull](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-big-integer-or-null.html)

* [toByteArray](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-byte-array.html)

* [toByteOrNull](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-byte-or-null.html)

* [toCharArray](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-char-array.html)

* [toCollection](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-collection.html)

* [toHashSet](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-hash-set.html)

* [toIntOrNull](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-int-or-null.html)

* [toList](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-list.html)

* [toLongOrNull](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-long-or-null.html)

* [toMutableList](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-mutable-list.html)

* [toPattern](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-pattern.html)

* [toRegex](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-regex.html)

* [toSet](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-set.html)

* [toShortOrNull](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-short-or-null.html)

* [toSortedSet](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/to-sorted-set.html)

* [trim](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/trim.html)

* [trimEnd](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/trim-end.html)

* [trimIndent](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/trim-indent.html)

* [trimMargin](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/trim-margin.html)

* [trimStart](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/trim-start.html)

* [windowed](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/windowed.html)

* [zip](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/zip.html)

* [zipWithIndex](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/zip-with-next.html)

##  Example

```java

import static io.github.linktosriram.kext4j.text.StringUtils.*;

map("hello world", Character::toUpperCase);     // [H, E, L, L, O,  , W, O, R, L, D]

filter("Hello World", Character::isUpperCase);  // "HW"

groupBy("Hello World", Character::isUpperCase); // {true=[H, W], false=[e, l, l, o,  , o, r, l, d]}

```

## License

This project is licensed under the MIT license. See the [LICENSE](LICENSE) file for more info.