Lombok: RequiredArgsConstructor not working

Question

It seems that @RequiredArgsConstructor not working in the code below. Why is it?

import java.io.Serializable;

import lombok.Data;
import lombok         


        

Answer 1

According to Documentation, Required arguments are final fields and fields with constraints such as @NonNull.

You need to make username as @NonNull

@NonNull private String username;

And you need to make them final too.