How to improve the builder pattern?

Question

Motivation

Recently I searched for a way to initialize a complex object without passing a lot of parameter to the constructor. I tried it with the builder pattern,

Answer 1

Instead of using multiple classes I would just use one class and multiple interfaces. It enforces your syntax without requiring as much typing. It also allows you to see all related code close together which makes it easier to understand what is going on with your code at a larger level.