[[java-aggs-bucket-histogram]] ==== Histogram Aggregation Here is how you can use {ref}/search-aggregations-bucket-histogram-aggregation.html[Histogram Aggregation] with Java API. ===== Prepare aggregation request Here is an example on how to create the aggregation request: [source,java] -------------------------------------------------- AggregationBuilder aggregation = AggregationBuilders .histogram("agg") .field("height") .interval(1); -------------------------------------------------- ===== Use aggregation response Import Aggregation definition classes: [source,java] -------------------------------------------------- import org.elasticsearch.search.aggregations.bucket.histogram.Histogram; -------------------------------------------------- [source,java] -------------------------------------------------- // sr is here your SearchResponse object Histogram agg = sr.getAggregations().get("agg"); // For each entry for (Histogram.Bucket entry : agg.getBuckets()) { Double key = (Double) entry.getKey(); // Key long docCount = entry.getDocCount(); // Doc count logger.info("key [{}], doc_count [{}]", key, docCount); } --------------------------------------------------