import java.util.List; public class SuperBuilderWithNonNull { @lombok.experimental.SuperBuilder public static class Parent { @lombok.NonNull @lombok.Builder.Default final String nonNullParentField = "default"; } @lombok.experimental.SuperBuilder public static class Child extends Parent { @lombok.NonNull String nonNullChildField; } public static void test() { Child x = Child.builder().nonNullChildField("child").nonNullParentField("parent").build(); } }