| Name | Description | Type | Package | Framework |
| BitMatrix | Fixed sized (non resizable) n*m bit matrix. | Class | cern.colt.bitvector | Colt |
| BitVector | Fixed sized (non resizable) bitvector. | Class | cern.colt.bitvector | Colt |
| QuickBitVector | Includes some operations that interpret sub-bitstrings as long integers. | Class | cern.colt.bitvector | Colt |