Sc8 - Scala Functions For Java 8

Using Scala libraries from Java 8 can be difficult, because Scala's functions are traits, and not recognised as a FunctionalInterface by the Java compiler. Sc8 is a simple conversion library that converts Java lambdas to Scala functions.

License	The Apache Software License, Version 2.0
GroupId	com.github.eirslett
ArtifactId	sc8
Last Version	0.1.0
Release Date	Sep 21, 2013
Type	jar
Description	Sc8 - Scala Functions For Java 8 Using Scala libraries from Java 8 can be difficult, because Scala's functions are traits, and not recognised as a FunctionalInterface by the Java compiler. Sc8 is a simple conversion library that converts Java lambdas to Scala functions.
Project URL	https://github.com/eirslett/sc8
Source Code Management	https://github.com/eirslett/sc8

Download sc8

Filename	Size
sc8-0.1.0.pom
sc8-0.1.0.jar	75 KB
sc8-0.1.0-sources.jar	15 KB
sc8-0.1.0-javadoc.jar	189 KB

How to add to project

Apache Maven

<!-- https://jarcasting.com/artifacts/com.github.eirslett/sc8/ -->
<dependency>
    <groupId>com.github.eirslett</groupId>
    <artifactId>sc8</artifactId>
    <version>0.1.0</version>
</dependency>

Gradle Groovy

// https://jarcasting.com/artifacts/com.github.eirslett/sc8/
implementation 'com.github.eirslett:sc8:0.1.0'

Gradle Kotlin

// https://jarcasting.com/artifacts/com.github.eirslett/sc8/
implementation ("com.github.eirslett:sc8:0.1.0")

Apache Buildr

'com.github.eirslett:sc8:jar:0.1.0'

Apache Ivy

<dependency org="com.github.eirslett" name="sc8" rev="0.1.0">
  <artifact name="sc8" type="jar" />
</dependency>

Groovy Grape

@Grapes(
@Grab(group='com.github.eirslett', module='sc8', version='0.1.0')
)

Scala SBT

libraryDependencies += "com.github.eirslett" % "sc8" % "0.1.0"

Leiningen

[com.github.eirslett/sc8 "0.1.0"]

Dependencies

provided (1)

Group / Artifact	Type	Version
org.scala-lang : scala-library	jar	2.10.0

test (2)

Group / Artifact	Type	Version
com.twitter : util-core_2.10	jar	6.4.0
junit : junit	jar	4.11

Project Modules

There are no modules declared in this project.

THIS PROJECT IS OUTDATED

3 years after making this project, Scala 2.12 has finally been released, with built-in full interop between Java 8 and Scala! 😄

Sc8 - Scala functions in Java 8

Using Scala libraries from Java 8 can be difficult, because Scala's functions are traits, and not recognised as a FunctionalInterface by the Java compiler. Sc8 is a simple conversion library that converts Java lambdas to Scala functions.

Install via Maven

<dependency>
  <groupId>com.github.eirslett</groupId>
  <artifactId>sc8</artifactId>
  <version>0.1.0</version>
</dependency>

Using the library

In your Java file, import F (and/or C if required):

import static com.github.eirslett.sc8.Sc8.C;
import static com.github.eirslett.sc8.Sc8.F;

What you have to do, is to wrap your lambda with F(...), for example:

result = someList.map(F(s -> s.toUpperCase()));

The F function converts the lambda into a Scala function for you. If your lambda returns void, use C instead:

myFuture.onSuccess(C(s -> System.out.println(s)));

Examples

Look at the tests for more examples.

Building

You need Java 8 and Maven to build this project. (Get Java 8 here: https://jdk8.java.net/download.html)

$ mvn clean package

If you don't want to install jdk8 globally, you can put it in a folder "jdk1.8.0" inside this project, and build with the "localjdk" profile:

$ mvn clean package -Plocaljdk

Generating sources

The Java and Scala sources are for the most part auto-generated, by the PHP-script "genfuncs.php". To generate sources, you will need PHP. Run $ php genfuncs.php to generate.

Versions

Version
0.1.0 Sep 21, 2013