https://www.guru99.com/what-is-mongodb.html
MongoClient mongoClient = new MongoClient(mongoServer);
MongoDatabase database = mongoClient.getDatabase(“NGDBDemo”)
MongoCollection<Document> collection = database.getCollection(“test”);
Document people = new Document(); // A document for a person
people.put(“Name”, “Guy”);
people.put(“Email”, “guy@gmail.com”);
BasicDBList friendList = new BasicDBList(); // List of friends
BasicDBObject friendDoc = new BasicDBObject(); // A Single Friend
friendDoc.put(“Name”, “Jo”);
friendDoc.put(“Email”, “Jo@gmail.com”);
friendList.add(friendDoc); // Add a Friend
friendDoc.clear();
friendDoc.put(“Name”, “John”);
friendDoc.put(“Email”, “john@gmail.comJo@gmail.com”);
friendList.add(friendDoc);
people.put(“Friends”, friendDoc);
collection.insetOne(people);