typesafe fluent builders are much more convenient now Java has lambdas

j8builder.java

// I probably should make a Maven plugin that generates this code.

public final class AddressBuilder {
    public interface Street2 {
        City street2(String street2);
    }
    public interface City {
        State city(String city);
    }
    public interface State {
        PostalCode state(String state);
    }
    public interface PostalCode {
        Country postalCode(String postalCode);
    }
    public interface Country {
        Address country(String country);
    }
    public Street2 street1(String street1) {
        return street2 -> city -> state -> postalCode -> country ->
                new Address(street1, street2, city, state, postalCode, country);
    }
}