BitSet and FastBit will always change themselves if they do some set operations, just like and, or, andNot. To avoid such cases, you should write a extended classes: For BitSet: MyBitSet For FastBitSet: MyFastBitSet

Javolution is a High-performence java library, it is not only fast but also very comfortable to use. FastBitSet of Javolution is similar to BitSet of Java native Bib. But there are still some differences in usage: 1. BitSet is cloneable,…