website/generated-content/get-started/quickstart-java/index.html - beam - Git at Google

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 an <a href=/get-started/wordcount-example>example pipeline</a> written with the
 <a href=/documentation/sdks/java>Apache Beam Java SDK</a>, using a
 <a href=/documentation#runners>runner</a> of your choice.</p><p>If you&rsquo;re interested in contributing to the Apache Beam Java codebase, see the
 <a href=/contribute>Contribution Guide</a>.</p><p>On this page:</p><nav id=TableOfContents><ul><li><a href=#set-up-your-development-environment>Set up your development environment</a></li><li><a href=#get-the-example-code>Get the example code</a></li><li><a href=#optional-convert-from-maven-to-gradle>Optional: Convert from Maven to Gradle</a></li><li><a href=#get-sample-text>Get sample text</a></li><li><a href=#run-a-pipeline>Run a pipeline</a><ul><li><a href=#run-wordcount-using-maven>Run WordCount using Maven</a></li><li><a href=#run-wordcount-using-gradle>Run WordCount using Gradle</a></li></ul></li><li><a href=#inspect-the-results>Inspect the results</a></li><li><a href=#next-steps>Next Steps</a></li></ul></nav><h2 id=set-up-your-development-environment>Set up your development environment</h2><ol><li>Download and install the
 <a href=https://www.oracle.com/technetwork/java/javase/downloads/index.html>Java Development Kit (JDK)</a>
 version 8, 11, or 17. Verify that the
 <a href=https://docs.oracle.com/javase/8/docs/technotes/guides/troubleshoot/envvars001.html>JAVA_HOME</a>
 environment variable is set and points to your JDK installation.</li><li>Download and install <a href=https://maven.apache.org/download.cgi>Apache Maven</a> by
 following the <a href=https://maven.apache.org/install.html>installation guide</a>
 for your operating system.</li><li>Optional: If you want to convert your Maven project to Gradle, install
 <a href=https://gradle.org/install/>Gradle</a>.</li></ol><h2 id=get-the-example-code>Get the example code</h2><ol><li><p>Generate a Maven example project that builds against the latest Beam release:<div class='shell-unix snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-unix data-lang=unix>mvn archetype:generate \
     -DarchetypeGroupId=org.apache.beam \
     -DarchetypeArtifactId=beam-sdks-java-maven-archetypes-examples \
     -DarchetypeVersion=2.56.0 \
     -DgroupId=org.example \
     -DartifactId=word-count-beam \
     -Dversion=&#34;0.1&#34; \
     -Dpackage=org.apache.beam.examples \
     -DinteractiveMode=false
    </code></pre></div></div><div class='shell-powerShell snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><div class=highlight><pre tabindex=0 class=chroma><code class=language-powerShell data-lang=powerShell><span class=line><span class=cl><span class=n>mvn</span> <span class=n>archetype</span><span class=err>:</span><span class=n>generate</span> <span class=p>`</span>
 </span></span><span class=line><span class=cl>  <span class=n>-D</span> <span class=n>archetypeGroupId</span><span class=p>=</span><span class=n>org</span><span class=p>.</span><span class=py>apache</span><span class=p>.</span><span class=py>beam</span> <span class=p>`</span>
 </span></span><span class=line><span class=cl>  <span class=n>-D</span> <span class=n>archetypeArtifactId</span><span class=p>=</span><span class=nb>beam-sdks</span><span class=n>-java-maven-archetypes-examples</span> <span class=p>`</span>
 </span></span><span class=line><span class=cl>  <span class=n>-D</span> <span class=n>archetypeVersion</span><span class=p>=</span><span class=mf>2.56</span><span class=p>.</span><span class=py>0</span> <span class=p>`</span>
 </span></span><span class=line><span class=cl>  <span class=n>-D</span> <span class=n>groupId</span><span class=p>=</span><span class=n>org</span><span class=p>.</span><span class=py>example</span> <span class=p>`</span>
 </span></span><span class=line><span class=cl>  <span class=n>-D</span> <span class=n>artifactId</span><span class=p>=</span><span class=nb>word-count</span><span class=n>-beam</span> <span class=p>`</span>
 </span></span><span class=line><span class=cl>  <span class=n>-D</span> <span class=n>version</span><span class=p>=</span><span class=s2>&#34;0.1&#34;</span> <span class=p>`</span>
 </span></span><span class=line><span class=cl>  <span class=n>-D</span> <span class=n>package</span><span class=p>=</span><span class=n>org</span><span class=p>.</span><span class=py>apache</span><span class=p>.</span><span class=py>beam</span><span class=p>.</span><span class=py>examples</span> <span class=p>`</span>
 </span></span><span class=line><span class=cl>  <span class=n>-D</span> <span class=n>interactiveMode</span><span class=p>=</span><span class=n>false</span>
 </span></span><span class=line><span class=cl>   </span></span></code></pre></div></div></div></p><p>Maven creates a new project in the <strong>word-count-beam</strong> directory.</p></li><li><p>Change into <strong>word-count-beam</strong>:<div class='shell-unix snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-unix data-lang=unix>cd word-count-beam/
    </code></pre></div></div><div class='shell-powerShell snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><div class=highlight><pre tabindex=0 class=chroma><code class=language-powerShell data-lang=powerShell><span class=line><span class=cl><span class=nb>cd </span><span class=p>.\</span><span class=nb>word-count</span><span class=n>-beam</span>
 </span></span><span class=line><span class=cl>   </span></span></code></pre></div></div></div>The directory contains a <strong>pom.xml</strong> and a <strong>src</strong> directory with example
 pipelines.</p></li><li><p>List the example pipelines:<div class='shell-unix snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-unix data-lang=unix>ls src/main/java/org/apache/beam/examples/
    </code></pre></div></div><div class='shell-powerShell snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><div class=highlight><pre tabindex=0 class=chroma><code class=language-powerShell data-lang=powerShell><span class=line><span class=cl><span class=nb>dir </span><span class=p>.\</span><span class=n>src</span><span class=p>\</span><span class=n>main</span><span class=p>\</span><span class=n>java</span><span class=p>\</span><span class=n>org</span><span class=p>\</span><span class=n>apache</span><span class=p>\</span><span class=n>beam</span><span class=p>\</span><span class=n>examples</span>
 </span></span><span class=line><span class=cl>   </span></span></code></pre></div></div></div>You should see the following examples:</p><ul><li><strong>DebuggingWordCount.java</strong> (<a href=https://github.com/apache/beam/blob/master/examples/java/src/main/java/org/apache/beam/examples/DebuggingWordCount.java>GitHub</a>)</li><li><strong>MinimalWordCount.java</strong> (<a href=https://github.com/apache/beam/blob/master/examples/java/src/main/java/org/apache/beam/examples/MinimalWordCount.java>GitHub</a>)</li><li><strong>WindowedWordCount.java</strong> (<a href=https://github.com/apache/beam/blob/master/examples/java/src/main/java/org/apache/beam/examples/WindowedWordCount.java>GitHub</a>)</li><li><strong>WordCount.java</strong> (<a href=https://github.com/apache/beam/blob/master/examples/java/src/main/java/org/apache/beam/examples/WordCount.java>GitHub</a>)</li></ul><p>The example used in this tutorial, <strong>WordCount.java</strong>, defines a
 Beam pipeline that counts words from an input file (by default, a <strong>.txt</strong>
 file containing Shakespeare&rsquo;s &ldquo;King Lear&rdquo;). To learn more about the examples,
 see the <a href=/get-started/wordcount-example>WordCount Example Walkthrough</a>.</p></li></ol><h2 id=optional-convert-from-maven-to-gradle>Optional: Convert from Maven to Gradle</h2><p>The steps below explain how to convert the build from Maven to Gradle for the
 following runners:</p><ul><li>Direct runner</li><li>Dataflow runner</li></ul><p>The conversion process for other runners is similar. For additional guidance,
 see
 <a href=https://docs.gradle.org/current/userguide/migrating_from_maven.html>Migrating Builds From Apache Maven</a>.</p><ol><li>In the directory with the <strong>pom.xml</strong> file, run the automated Maven-to-Gradle
 conversion:<div class=snippet><div class="notebook-skip code-snippet without_switcher"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code>gradle init
    </code></pre></div></div>You&rsquo;ll be asked if you want to generate a Gradle build. Enter <strong>yes</strong>. You&rsquo;ll
 also be prompted to choose a DSL (Groovy or Kotlin). For this tutorial, enter
 <strong>2</strong> for Kotlin.</li><li>Open the generated <strong>build.gradle.kts</strong> file and make the following changes:<ol><li>In <code>repositories</code>, replace <code>mavenLocal()</code> with <code>mavenCentral()</code>.</li><li>In <code>repositories</code>, declare a repository for Confluent Kafka dependencies:<div class=snippet><div class="notebook-skip code-snippet without_switcher"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code>maven {
     url = uri(&#34;https://packages.confluent.io/maven/&#34;)
 }
       </code></pre></div></div></li><li>At the end of the build script, add the following conditional dependency:<div class=snippet><div class="notebook-skip code-snippet without_switcher"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code>if (project.hasProperty(&#34;dataflow-runner&#34;)) {
     dependencies {
         runtimeOnly(&#34;org.apache.beam:beam-runners-google-cloud-dataflow-java:2.56.0&#34;)
     }
 }
       </code></pre></div></div></li><li>At the end of the build script, add the following task:<div class=snippet><div class="notebook-skip code-snippet without_switcher"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code>task(&#34;execute&#34;, JavaExec::class) {
     classpath = sourceSets[&#34;main&#34;].runtimeClasspath
     mainClass.set(System.getProperty(&#34;mainClass&#34;))
 }
       </code></pre></div></div></li></ol></li><li>Build your project:<div class=snippet><div class="notebook-skip code-snippet without_switcher"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code>gradle build
    </code></pre></div></div></li></ol><h2 id=get-sample-text>Get sample text</h2><blockquote><p>If you&rsquo;re planning to use the DataflowRunner, you can skip this step. The
 runner will pull text directly from Google Cloud Storage.</p></blockquote><ol><li>In the <strong>word-count-beam</strong> directory, create a file called <strong>sample.txt</strong>.</li><li>Add some text to the file. For this example, use the text of Shakespeare&rsquo;s
 <a href=https://storage.cloud.google.com/apache-beam-samples/shakespeare/kinglear.txt>King Lear</a>.</li></ol><h2 id=run-a-pipeline>Run a pipeline</h2><p>A single Beam pipeline can run on multiple Beam
 <a href=/documentation#runners>runners</a>. The
 <a href=/documentation/runners/direct>DirectRunner</a> is useful for getting started,
 because it runs on your machine and requires no specific setup. If you&rsquo;re just
 trying out Beam and you&rsquo;re not sure what to use, use the
 <a href=/documentation/runners/direct>DirectRunner</a>.</p><p>The general process for running a pipeline goes like this:</p><ol><li>Complete any runner-specific setup.</li><li>Build your command line:<ol><li>Specify a runner with <code>--runner=&lt;runner></code> (defaults to the
 <a href=/documentation/runners/direct>DirectRunner</a>).</li><li>Add any runner-specific required options.</li><li>Choose input files and an output location that are accessible to the
 runner. (For example, you can&rsquo;t access a local file if you are running
 the pipeline on an external cluster.)</li></ol></li><li>Run the command.</li></ol><p>To run the WordCount pipeline:</p><ol><li><p>Follow the setup steps for your runner:</p><ul><li><a href=/documentation/runners/flink>FlinkRunner</a></li><li><a href=/documentation/runners/spark>SparkRunner</a></li><li><a href=/documentation/runners/dataflow>DataflowRunner</a></li><li><a href=/documentation/runners/samza>SamzaRunner</a></li><li><a href=/documentation/runners/nemo>NemoRunner</a></li><li><a href=/documentation/runners/jet>JetRunner</a></li></ul><p>The DirectRunner will work without additional setup.</p></li><li><p>Run the corresponding Maven or Gradle command below.</p></li></ol><h3 id=run-wordcount-using-maven>Run WordCount using Maven</h3><p>For Unix shells:</p><p><div class='runner-direct snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-direct data-lang=direct>mvn compile exec:java -Dexec.mainClass=org.apache.beam.examples.WordCount \
     -Dexec.args=&#34;--inputFile=sample.txt --output=counts&#34; -Pdirect-runner</code></pre></div></div><div class='runner-flink snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-flink data-lang=flink>mvn compile exec:java -Dexec.mainClass=org.apache.beam.examples.WordCount \
     -Dexec.args=&#34;--runner=FlinkRunner --inputFile=sample.txt --output=counts&#34; -Pflink-runner</code></pre></div></div><div class='runner-flinkCluster snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-flinkCluster data-lang=flinkCluster>mvn package exec:java -Dexec.mainClass=org.apache.beam.examples.WordCount \
     -Dexec.args=&#34;--runner=FlinkRunner --flinkMaster=&lt;flink master&gt; --filesToStage=target/word-count-beam-bundled-0.1.jar \
                  --inputFile=sample.txt --output=/tmp/counts&#34; -Pflink-runner</code></pre></div></div><div class='runner-spark snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-spark data-lang=spark>mvn compile exec:java -Dexec.mainClass=org.apache.beam.examples.WordCount \
     -Dexec.args=&#34;--runner=SparkRunner --inputFile=sample.txt --output=counts&#34; -Pspark-runner</code></pre></div></div><div class='runner-dataflow snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-dataflow data-lang=dataflow>mvn compile exec:java -Dexec.mainClass=org.apache.beam.examples.WordCount \
     -Dexec.args=&#34;--runner=DataflowRunner --project=&lt;your-gcp-project&gt; \
                  --region=&lt;your-gcp-region&gt; \
                  --gcpTempLocation=gs://&lt;your-gcs-bucket&gt;/tmp \
                  --inputFile=gs://apache-beam-samples/shakespeare/* --output=gs://&lt;your-gcs-bucket&gt;/counts&#34; \
     -Pdataflow-runner</code></pre></div></div><div class='runner-samza snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-samza data-lang=samza>mvn compile exec:java -Dexec.mainClass=org.apache.beam.examples.WordCount \
     -Dexec.args=&#34;--inputFile=sample.txt --output=/tmp/counts --runner=SamzaRunner&#34; -Psamza-runner</code></pre></div></div><div class='runner-nemo snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-nemo data-lang=nemo>mvn package -Pnemo-runner &amp;&amp; java -cp target/word-count-beam-bundled-0.1.jar org.apache.beam.examples.WordCount \
     --runner=NemoRunner --inputFile=`pwd`/sample.txt --output=counts</code></pre></div></div><div class='runner-jet snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-jet data-lang=jet>mvn package -Pjet-runner
 java -cp target/word-count-beam-bundled-0.1.jar org.apache.beam.examples.WordCount \
     --runner=JetRunner --jetLocalMode=3 --inputFile=`pwd`/sample.txt --output=counts</code></pre></div></div></p><p>For Windows PowerShell:</p><p><div class='runner-direct snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-direct data-lang=direct>mvn compile exec:java -D exec.mainClass=org.apache.beam.examples.WordCount `
  -D exec.args=&#34;--inputFile=sample.txt --output=counts&#34; -P direct-runner</code></pre></div></div><div class='runner-flink snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-flink data-lang=flink>mvn compile exec:java -D exec.mainClass=org.apache.beam.examples.WordCount `
  -D exec.args=&#34;--runner=FlinkRunner --inputFile=sample.txt --output=counts&#34; -P flink-runner</code></pre></div></div><div class='runner-flinkCluster snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-flinkCluster data-lang=flinkCluster>mvn package exec:java -D exec.mainClass=org.apache.beam.examples.WordCount `
  -D exec.args=&#34;--runner=FlinkRunner --flinkMaster=&lt;flink master&gt; --filesToStage=.\target\word-count-beam-bundled-0.1.jar `
                --inputFile=C:\path\to\quickstart\sample.txt --output=C:\tmp\counts&#34; -P flink-runner</code></pre></div></div><div class='runner-spark snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-spark data-lang=spark>mvn compile exec:java -D exec.mainClass=org.apache.beam.examples.WordCount `
  -D exec.args=&#34;--runner=SparkRunner --inputFile=sample.txt --output=counts&#34; -P spark-runner</code></pre></div></div><div class='runner-dataflow snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-dataflow data-lang=dataflow>mvn compile exec:java -D exec.mainClass=org.apache.beam.examples.WordCount `
  -D exec.args=&#34;--runner=DataflowRunner --project=&lt;your-gcp-project&gt; `
                --region=&lt;your-gcp-region&gt; \
                --gcpTempLocation=gs://&lt;your-gcs-bucket&gt;/tmp `
                --inputFile=gs://apache-beam-samples/shakespeare/* --output=gs://&lt;your-gcs-bucket&gt;/counts&#34; `
  -P dataflow-runner</code></pre></div></div><div class='runner-samza snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-samza data-lang=samza>mvn compile exec:java -D exec.mainClass=org.apache.beam.examples.WordCount `
     -D exec.args=&#34;--inputFile=sample.txt --output=/tmp/counts --runner=SamzaRunner&#34; -P samza-runner</code></pre></div></div><div class='runner-nemo snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-nemo data-lang=nemo>mvn package -P nemo-runner -DskipTests
 java -cp target/word-count-beam-bundled-0.1.jar org.apache.beam.examples.WordCount `
     --runner=NemoRunner --inputFile=`pwd`/sample.txt --output=counts</code></pre></div></div><div class='runner-jet snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-jet data-lang=jet>mvn package -P jet-runner
 java -cp target/word-count-beam-bundled-0.1.jar org.apache.beam.examples.WordCount `
     --runner=JetRunner --jetLocalMode=3 --inputFile=$pwd/sample.txt --output=counts</code></pre></div></div></p><h3 id=run-wordcount-using-gradle>Run WordCount using Gradle</h3><p>For Unix shells:</p><p><div class='runner-direct snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-direct data-lang=direct>gradle clean execute -DmainClass=org.apache.beam.examples.WordCount \
     --args=&#34;--inputFile=sample.txt --output=counts&#34;</code></pre></div></div><div class='runner-flink snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-flink data-lang=flink>TODO: document Flink on Gradle: https://github.com/apache/beam/issues/21498</code></pre></div></div><div class='runner-flinkCluster snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-flinkCluster data-lang=flinkCluster>TODO: document FlinkCluster on Gradle: https://github.com/apache/beam/issues/21499</code></pre></div></div><div class='runner-spark snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-spark data-lang=spark>TODO: document Spark on Gradle: https://github.com/apache/beam/issues/21502</code></pre></div></div><div class='runner-dataflow snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-dataflow data-lang=dataflow>gradle clean execute -DmainClass=org.apache.beam.examples.WordCount \
     --args=&#34;--project=&lt;your-gcp-project&gt; --inputFile=gs://apache-beam-samples/shakespeare/* \
     --output=gs://&lt;your-gcs-bucket&gt;/counts --runner=DataflowRunner&#34; -Pdataflow-runner</code></pre></div></div><div class='runner-samza snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-samza data-lang=samza>TODO: document Samza on Gradle: https://github.com/apache/beam/issues/21500</code></pre></div></div><div class='runner-nemo snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-nemo data-lang=nemo>TODO: document Nemo on Gradle: https://github.com/apache/beam/issues/21503</code></pre></div></div><div class='runner-jet snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-jet data-lang=jet>TODO: document Jet on Gradle: https://github.com/apache/beam/issues/21501</code></pre></div></div></p><h2 id=inspect-the-results>Inspect the results</h2><p>After the pipeline has completed, you can view the output. There might be
 multiple output files prefixed by <code>count</code>. The number of output files is decided
 by the runner, giving it the flexibility to do efficient, distributed execution.</p><ol><li>View the output files in a Unix shell:<div class='runner-direct snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-direct data-lang=direct>ls counts*
    </code></pre></div></div><div class='runner-flink snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-flink data-lang=flink>ls counts*
    </code></pre></div></div><div class='runner-flinkCluster snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-flinkCluster data-lang=flinkCluster>ls /tmp/counts*
    </code></pre></div></div><div class='runner-spark snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-spark data-lang=spark>ls counts*
    </code></pre></div></div><div class='runner-dataflow snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-dataflow data-lang=dataflow>gsutil ls gs://&lt;your-gcs-bucket&gt;/counts*
    </code></pre></div></div><div class='runner-samza snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-samza data-lang=samza>ls /tmp/counts*
    </code></pre></div></div><div class='runner-nemo snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-nemo data-lang=nemo>ls counts*
    </code></pre></div></div><div class='runner-jet snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-jet data-lang=jet>ls counts*
    </code></pre></div></div>The output files contain unique words and the number of occurrences of each
 word.</li><li>View the output content in a Unix shell:<div class='runner-direct snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-direct data-lang=direct>more counts*
    </code></pre></div></div><div class='runner-flink snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-flink data-lang=flink>more counts*
    </code></pre></div></div><div class='runner-flinkCluster snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-flinkCluster data-lang=flinkCluster>more /tmp/counts*
    </code></pre></div></div><div class='runner-spark snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-spark data-lang=spark>more counts*
    </code></pre></div></div><div class='runner-dataflow snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-dataflow data-lang=dataflow>gsutil cat gs://&lt;your-gcs-bucket&gt;/counts*
    </code></pre></div></div><div class='runner-samza snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-samza data-lang=samza>more /tmp/counts*
    </code></pre></div></div><div class='runner-nemo snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-nemo data-lang=nemo>more counts*
    </code></pre></div></div><div class='runner-jet snippet'><div class="notebook-skip code-snippet"><a class=copy type=button data-bs-toggle=tooltip data-bs-placement=bottom title="Copy to clipboard"><img src=/images/copy-icon.svg></a><pre tabindex=0><code class=language-jet data-lang=jet>more counts*
    </code></pre></div></div>The order of elements is not guaranteed, to allow runners to optimize for
 efficiency. But the output should look something like this:<pre tabindex=0><code>...
 Think: 3
 slower: 1
 Having: 1
 revives: 1
 these: 33
 wipe: 1
 arrives: 1
 concluded: 1
 begins: 3
 ...
 </code></pre></li></ol><h2 id=next-steps>Next Steps</h2><ul><li>Learn more about the <a href=/documentation/sdks/java/>Beam SDK for Java</a>
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