Class java.util.BitSet - JDK 5 Documentation v1.1.8, Java 2 SDK 英文文档

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Class java.util.BitSet

java.lang.Object
   |
   +----java.util.BitSet

public final class BitSet
extends Object
implements Cloneable, Serializable

A set of bits. The set automatically grows as more bits are needed.

BitSet(): Creates an empty set.
BitSet(int): Creates an empty set with the specified size.

and(BitSet): Logically ANDs this bit set with the specified set of bits.
clear(int): Clears a bit.
clone(): Clones the BitSet.
equals(Object): Compares this object against the specified object.
get(int): Gets a bit.
hashCode(): Gets the hashcode.
or(BitSet): Logically ORs this bit set with the specified set of bits.
set(int): Sets a bit.
size(): Calculates and returns the set's size in bits.
toString(): Converts the BitSet to a String.
xor(BitSet): Logically XORs this bit set with the specified set of bits.

BitSet

 public BitSet()

Creates an empty set.

BitSet

 public BitSet(int nbits)

Creates an empty set with the specified size.

Parameters:: nbits - the size of the set

set

 public void set(int bit)

Sets a bit.

Parameters:: bit - the bit to be set

clear

 public void clear(int bit)

Clears a bit.

Parameters:: bit - the bit to be cleared

get

 public boolean get(int bit)

Gets a bit.

Parameters:: bit - the bit to be gotten

and

 public void and(BitSet set)

Logically ANDs this bit set with the specified set of bits.

Parameters:: set - the bit set to be ANDed with

 public void or(BitSet set)

Logically ORs this bit set with the specified set of bits.

Parameters:: set - the bit set to be ORed with

xor

 public void xor(BitSet set)

Logically XORs this bit set with the specified set of bits.

Parameters:: set - the bit set to be XORed with

hashCode

 public int hashCode()

Gets the hashcode.

Overrides:: hashCode in class Object

size

 public int size()

Calculates and returns the set's size in bits. The maximum element in the set is the size - 1st element.

equals

 public boolean equals(Object obj)

Compares this object against the specified object.

Parameters:: obj - the object to compare with
Returns:: true if the objects are the same; false otherwise.
Overrides:: equals in class Object

clone

 public Object clone()

Clones the BitSet.

Overrides:: clone in class Object

toString

 public String toString()

Converts the BitSet to a String.

Overrides:: toString in class Object

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