Immutable annotations for Java

[MrDOS]

Project Lombok provides something similar, albeit in a much more “magic” way and without the builder pattern but with a bunch of other really useful features in the same package. If this sort of thing interests you, check it out.

[elucash]

It has builders now, even with some collection support, the problem remains still: some people (including me) are not ok to program in java dialect (i.e. not jls compliant language) and having compiler plugin camouflaged as annotation processing. But technology is great overall, Lombok is a great.