Docs Menu

Docs HomeJava Sync

Insert a Document

You can insert a single document into a collection using the insertOne() method on a MongoCollection object. To insert a document, construct a Document object that contains the fields and values that you want to store. If you call the insertOne() method on a collection that does not exist yet, the server automatically creates it for you.

Upon a successful insertion, insertOne() returns an instance of InsertOneResult. You can retrieve information such as the _id field of the document you inserted by calling the getInsertedId() method on the InsertOneResult instance.

If your insert operation fails, the driver raises an exception. For more information on the types of exceptions raised under specific conditions, see the API documentation for insertOne(), linked at the bottom of this page.

The following snippet inserts a single document into the movies collection.


This example connects to an instance of MongoDB using a connection URI. To learn more about connecting to your MongoDB instance, see the connection guide.

package usage.examples;
import java.util.Arrays;
import org.bson.Document;
import org.bson.types.ObjectId;
import com.mongodb.MongoException;
import com.mongodb.client.MongoClient;
import com.mongodb.client.MongoClients;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import com.mongodb.client.result.InsertOneResult;
public class InsertOne {
public static void main(String[] args) {
// Replace the uri string with your MongoDB deployment's connection string
String uri = "<connection string uri>";
try (MongoClient mongoClient = MongoClients.create(uri)) {
MongoDatabase database = mongoClient.getDatabase("sample_mflix");
MongoCollection<Document> collection = database.getCollection("movies");
try {
InsertOneResult result = collection.insertOne(new Document()
.append("_id", new ObjectId())
.append("title", "Ski Bloopers")
.append("genres", Arrays.asList("Documentary", "Comedy")));
System.out.println("Success! Inserted document id: " + result.getInsertedId());
} catch (MongoException me) {
System.err.println("Unable to insert due to an error: " + me);

When you run the example, you should see output that resembles the following with the inserted document's ObjectId in the value field:

Inserted document id: BsonObjectId{value=...}


Legacy API

If you are using the legacy API, see our FAQ page to learn what changes you need to make to this code example.

For additional information on the classes and methods mentioned on this page, see the following API Documentation:

←  Insert OperationsInsert Multiple Documents →
Share Feedback
© 2023 MongoDB, Inc.


  • Careers
  • Investor Relations
  • Legal Notices
  • Privacy Notices
  • Security Information
  • Trust Center
© 2023 MongoDB, Inc.