Java Reference
In-Depth Information
BitSet provides a pair of constructors for initializing a BitSet instance:
BitSet() initializestheinstancetoinitiallystoreanimplementation-dependentnum-
ber of bits, whereas BitSet(int nbits) initializes the instance to initially store
nbits bits. BitSet also provides various methods, including the following:
void and(BitSet bs) bitwise ANDs this bitset with bs . This bitset is
modifiedsuchthatabitissetto1whenitandthebitatthesamepositionin bs
are 1.
void andNot(BitSet bs) setsallthebitsinthisbitsetto0whosecor-
responding bits are set to 1 in bs .
void clear() sets all the bits in this bitset to 0.
Object clone() clones this bitset to produce a new bitset. The clone has
exactly the same bits set to one as this bitset.
boolean get(int bitIndex) returnsthevalueofthisbitset's bit,asa
Booleantrue/falsevalue(truefor1,falsefor0)atthezero-based bitIndex .
Thismethodthrows IndexOutOfBoundsException when bitIndex is
less than 0.
int length() returnsthe“logicalsize”ofthisbitset,whichistheindexof
the highest 1 bit plus 1, or 0 when this bitset contains no 1 bits.
void or(BitSet bs) bitwiseinclusiveORsthisbitsetwith bs .Thisbitset
bs is 1, or when both bits are 1.
void set(int bitIndex, boolean value) setsthebitatthezero-
based bitIndex to value (true is converted to 1; false is converted to 0).
Thismethodthrows IndexOutOfBoundsException when bitIndex is
less than 0.
int size() returns the number of bits that are being used by this bitset to
represent bit values.
String toString() returns a string representation of this bitset in terms
of the positions of bits that are 1; for example, {4, 5, 9, 10} .
void xor(BitSet set) bitwise exclusive ORsthisbitset with bs .This
position in bs (but not both) is 1.
Search WWH ::

Custom Search