How to create a MongoDB collection using Java?

You can create a collection in MongoDB using the db.createCollection() method.

Syntax

db.createCollection(name, options)

Where

• db is the database.

• name is the name of the collection you want to create.

• Option is the set of optional parameters such as capped, auto indexed, size and, max.

Example

> use myDatabase switched to db myDatabase > db.createCollection("myCollection") { "ok" : 1 }

Using Java program

In Java, you can create a collection using the createCollection() method of the com.mongodb.client.MongoDatabase interface. This method accepts a string value representing the name of the collection.

Therefore to create a collection in MongoDB using Java program −

• Make sure you have installed MongoDB in your system

• Add the following dependency to its pom.xml file of your Java project.

<dependency> <groupId>org.mongodb</groupId> <artifactId>mongo-java-driver</artifactId> <version>3.12.2</version> </dependency>

• Create a MongoDB client by instantiating the MongoClient class.

• Connect to a database using the getDatabase().

• Invoke the createCollection() method by passing the name of the collection(string).

Example

import com.mongodb.client.MongoDatabase; import com.mongodb.MongoClient; public class CreatingCollection {    public static void main( String args[] ) {       //Creating a MongoDB client       MongoClient mongo = new MongoClient( "localhost" , 27017 );       //Connecting to the database       MongoDatabase database = mongo.getDatabase("myDatabase");       //Creating a collection       database.createCollection("sampleCollection");       System.out.println("Collection created successfully");    } }

Output

Collection created successfully