import com.couchbase.client.java.*; public class CouchbaseExample { public static void main(String[] args) { Cluster cluster = CouchbaseCluster.create("localhost"); Bucket bucket = cluster.openBucket("myBucket"); JsonObject document = JsonObject.create() .put("name", "John Doe") .put("email", "john.doe@example.com"); bucket.upsert("user123", document); JsonDocument retrievedDocument = bucket.get("user123"); System.out.println(retrievedDocument.content()); cluster.disconnect(); } }