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layout: section title: “Keys” permalink: /documentation/transforms/java/elementwise/keys/ section_menu: section-menu/documentation.html

Keys

Examples

Example

PCollection<KV<String, Integer>> keyValuePairs = /* ... */;
PCollection<String> keys = keyValuePairs.apply(Keys.create());

Related transforms

• [KvSwap]({{ site.baseurl }}/documentation/transforms/java/elementwise/kvswap) swaps key-value pair values.
• [Values]({{ site.baseurl }}/documentation/transforms/java/elementwise/values) for extracting the value of each element.
• [WithKeys]({{ site.baseurl }}/documentation/transforms/java/elementwise/withkeys) for adding a key to each element.