This code snippet shows how to find an existing document in a the MongoDB "people" collection and replace it.

FindAndReplaceDocument

		//Update a person document by Id
		Document updatedPerson = new Document("First Name", "Marilyn")
		.append("Last Name", "Monroe")
		.append("Description", "Actor");

		collection.findOneAndReplace(eq("First Name", "Marilyn"), updatedPerson);
		System.out.println("Result After Update\n");
		printAllPeople();