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<!DOCTYPE html>
<html lang="en">
<head>
<title>
Functional Java
- Quickstart
</title>
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<a class="navbar-brand" href="/"><img src="/img/white-lambda6.png" height="20"/> Functional Java</a>
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<article>
<h2>Quickstart</h2>
<p><div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>The latest stable version as at July 2015 is 5.0. Here is how to quickly add the library to your project and get started.</p>
</div>
<div class="paragraph">
<p>The Functional Java artifact is published to Maven Central using the group <code>org.functionaljava</code> with three published artifacts:</p>
</div>
<div class="ulist">
<ul>
<li> <p>the core library (<code>functionaljava</code>)</p> </li>
<li> <p>Quickcheck property based testing module (<code>functionaljava-quickcheck</code>)</p> </li>
<li> <p>Java core helper, a simple functional helper for java.util standard types (<code>functionaljava-java-core</code>)</p> </li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_gradle">Gradle</h2>
<div class="sectionbody">
<div class="paragraph">
<p>To add Functional Java to your Gradle project, add the following snippet to the <em>dependencies</em> section of your <code>build.gradle</code> file.</p>
</div>
<div class="listingblock">
<div class="content">
<pre>compile "org.functionaljava:functionaljava:5.0"
compile "org.functionaljava:functionaljava-quickcheck:5.0"
compile "org.functionaljava:functionaljava-java-core:5.0"</pre>
</div>
</div>
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<div class="sect1">
<h2 id="_maven">Maven</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Add the following dependencies.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="prettyprint highlight"><code class="language-xml" data-lang="xml"><dependency>
<groupId>org.functionaljava</groupId>
<artifactId>functionaljava</artifactId>
<version>5.0</version>
</dependency>
<dependency>
<groupId>org.functionaljava</groupId>
<artifactId>functionaljava-quickcheck</artifactId>
<version>5.0</version>
</dependency>
<dependency>
<groupId>org.functionaljava</groupId>
<artifactId>functionaljava-java-core</artifactId>
<version>5.0</version>
</dependency></code></pre>
</div>
</div>
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</div>
<div class="sect1">
<h2 id="_first_code_example">First Code Example</h2>
<div class="sectionbody">
<div class="paragraph">
<p>We can easily map over a list to apply the same function to each element in the list and print the resulting list. Note that this uses the list <code>fj.data.List</code>.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="prettyprint highlight"><code class="language-java" data-lang="java">import static fj.data.List.list;
import fj.data.List;
import static fj.Show.intShow;
import static fj.Show.listShow;
public final class ListMapExample {
public static void main(final String[] args) {
final List<Integer> a = list(1, 2, 3).map(i -> i + 42);
listShow(intShow).println(a); // [43,44,45]
// combined into a single line
listShow(intShow).println(list(1, 2, 3).map(i -> i + 42)); // [43,44,45]
}
}</code></pre>
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