Discussion on: Building Generic Payloads with the Builder Pattern in Java

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Replies for: Builder pattern can be used only to optional parameters. Otherwise, it may result in uninitialized values and NPE.

Thanks Sergiy. Yes, it'll result in NPE without optional params. Let me know if we can do something to fix this?

There is a Fluent Builder pattern, suitable for cases when all (or majority) of parameters are required. You may find interesting this article.

Yes, Step Builder will force client to provide datum.

Moreover, this pattern enforces order in which fields are assigned. This is helpful in many situations, especially when changes in code are compared.