To display list of collections, you can use database.listCollectionNames() method to get the list of collection names in the databases.

MongoIterable<String> collections = database.listCollectionNames();

Example

Following is the code snippet to display list of collections −

import com.mongodb.client.MongoClient;
import com.mongodb.client.MongoClients;
import com.mongodb.client.MongoDatabase;
import com.mongodb.client.MongoIterable;

public class Tester {
   public static void main(String[] args) {
      // Creating a Mongo client 
      MongoClient mongoClient = MongoClients.create("mongodb://localhost:27017");

      // Get the database
      MongoDatabase database = mongoClient.getDatabase("myDb");

      // Create the collection
      database.createCollection("sampleCollection");

      // Get the list of collection names
      MongoIterable<String> collections = database.listCollectionNames();

      for (String name : collections) {
         System.out.println(name);
      }	   
   }
}

Now, let”s compile and run the above program as shown below.

$javac Tester.java 
$java Tester

Output

On executing, the above program gives you the following output.

sampleCollection