如何使用Java创建MongoDB副本集？

Question

假设我已使用MongoDB Java驱动程序创建以下内容：

public class MongoDBTest {

    public static final String MY_MONGO = "MyMongo";
    public static final String ROOT = "Root";

    public static void main(String[] args) {
        MongoDBTest test = new MongoDBTest();
        test.createDocument();
    }

    public void createDocument() {
        MongoClient client = null;
        DB db = null;
        try {
            client = new MongoClient( "localhost", 27017 );
            db = client.getDB( MY_MONGO );
        }
        catch (UnknownHostException ignored) {
        }

        System.out.println( "Connected to database." );


        assert db != null;
        DBObject document = new BasicDBObject( "name", "Me" ).append( "Place", "NYC" );
        System.out.println("Inserting document: "+document);
        DBCollection collection = db.collectionExists( ROOT ) ? db.getCollection( ROOT ) : db.createCollection(
                ROOT,
                document
        );
        collection.insert( document );
    }
}

如何将此数据库转换为运行端口为27017,27018和27019的DB的副本集？ 如果我无法将其转换为副本集，如何在开头创建副本集？