question: public static BitArray allocate ( long bits ) { if ( ! ( bits > 0 & ( bits & ( bits - 1 ) ) == 0 ) ) throw new IllegalArgumentException ( "size must be a power of 2" ) ; return new BitArray ( HeapBytes . allocate ( Math . max ( bits / 8 + 8 , 8 ) ) , bits ) ; }
target:  Allocates a new direct bit set.