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https://issues.apache.org/jira/browse/BEAM-14320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17523803#comment-17523803
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Denise Case commented on BEAM-14320:
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The following pull request provides this information:
* [https://github.com/apache/beam/pull/17369]
Denise
> Update programming-guide w/Java GroupByKey example
> --------------------------------------------------
>
> Key: BEAM-14320
> URL: https://issues.apache.org/jira/browse/BEAM-14320
> Project: Beam
> Issue Type: Task
> Components: website
> Reporter: Denise Case
> Priority: P3
> Labels: website
>
> Minor addition to assist new users with a GroupByKey example in Java.
> Specifically:
> Add the following content to provide a Java example at the end of section
> 4.2.2. GroupByKey.
> ------------------
> Using {{GroupByKey}} is straightforward:
> {\{< highlight java >}}
> // The input PCollection.
> PCollection<KV<String, String>> mapped = ...;
> // Apply GroupByKey to the PCollection mapped.
> // Save the result as the PCollection reduced.
> PCollection<KV<String, Iterable>> reduced =
> mapped.apply(GroupByKey.<String, String>create());
> {\{< /highlight >}}
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