java: sparse bit vector

Question

Are there any well-known libraries in Java for sparse bit vectors?

(And are there guidelines for how sparse is useful to use them vs. java.util.BitSet?)

Answer 1

You could try the JavaEWAH library.

https://code.google.com/p/javaewah/

Depending on your problem it may be a good fit.

(It is used by Apache Hive and others.)