java.util.BitSet.wordIndex()方法的使用及代码示例
本文整理了Java中java.util.BitSet.wordIndex()方法的一些代码示例，展示了BitSet.wordIndex()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。BitSet.wordIndex()方法的具体详情如下：
包路径：java.util.BitSet
类名称：BitSet
方法名：wordIndex
BitSet.wordIndex介绍
[英]Given a bit index, return word index containing it.
[中]给定位索引，返回包含它的单词索引。
代码示例
代码示例来源：origin: jtulach/bck2brwsr
private void initWords(int nbits) {
words = new long[wordIndex(nbits-1) + 1];
}代码示例来源：origin: org.apidesign.bck2brwsr/emul
private void initWords(int nbits) {
words = new long[wordIndex(nbits-1) + 1];
}代码示例来源：origin: org.apidesign.bck2brwsr/emul
/**
* Returns the value of the bit with the specified index. The value
* is {@code true} if the bit with the index {@code bitIndex}
* is currently set in this {@code BitSet}; otherwise, the result
* is {@code false}.
*
* @param bitIndex the bit index
* @return the value of the bit with the specified index
* @throws IndexOutOfBoundsException if the specified index is negative
*/
public boolean get(int bitIndex) {
if (bitIndex < 0)
throw new IndexOutOfBoundsException("bitIndex < 0: " + bitIndex);
checkInvariants();
int wordIndex = wordIndex(bitIndex);
return (wordIndex < wordsInUse)
&& ((words[wordIndex] & (1L << bitIndex)) != 0);
}代码示例来源：origin: jtulach/bck2brwsr
/**
* Returns the value of the bit with the specified index. The value
* is {@code true} if the bit with the index {@code bitIndex}
* is currently set in this {@code BitSet}; otherwise, the result
* is {@code false}.
*
* @param bitIndex the bit index
* @return the value of the bit with the specified index
* @throws IndexOutOfBoundsException if the specified index is negative
*/
public boolean get(int bitIndex) {
if (bitIndex < 0)
throw new IndexOutOfBoundsException("bitIndex < 0: " + bitIndex);
checkInvariants();
int wordIndex = wordIndex(bitIndex);
return (wordIndex < wordsInUse)
&& ((words[wordIndex] & (1L << bitIndex)) != 0);
}代码示例来源：origin: org.apidesign.bck2brwsr/emul
/**
* Returns the index of the first bit that is set to {@code false}
* that occurs on or after the specified starting index.
*
* @param fromIndex the index to start checking from (inclusive)
* @return the index of the next clear bit
* @throws IndexOutOfBoundsException if the specified index is negative
* @since 1.4
*/
public int nextClearBit(int fromIndex) {
// Neither spec nor implementation handle bitsets of maximal length.
// See 4816253.
if (fromIndex < 0)
throw new IndexOutOfBoundsException("fromIndex < 0: " + fromIndex);
checkInvariants();
int u = wordIndex(fromIndex);
if (u >= wordsInUse)
return fromIndex;
long word = ~words[u] & (WORD_MASK << fromIndex);
while (true) {
if (word != 0)
return (u * BITS_PER_WORD) + Long.numberOfTrailingZeros(word);
if (++u == wordsInUse)
return wordsInUse * BITS_PER_WORD;
word = ~words[u];
}
}代码示例来源：origin: jtulach/bck2brwsr
/**
* Returns the index of the first bit that is set to {@code false}
* that occurs on or after the specified starting index.
*
* @param fromIndex the index to start checking from (inclusive)
* @return the index of the next clear bit
* @throws IndexOutOfBoundsException if the specified index is negative
* @since 1.4
*/
public int nextClearBit(int fromIndex) {
// Neither spec nor implementation handle bitsets of maximal length.
// See 4816253.
if (fromIndex < 0)
throw new IndexOutOfBoundsException("fromIndex < 0: " + fromIndex);
checkInvariants();
int u = wordIndex(fromIndex);
if (u >= wordsInUse)
return fromIndex;
long word = ~words[u] & (WORD_MASK << fromIndex);
while (true) {
if (word != 0)
return (u * BITS_PER_WORD) + Long.numberOfTrailingZeros(word);
if (++u == wordsInUse)
return wordsInUse * BITS_PER_WORD;
word = ~words[u];
}
}代码示例来源：origin: junkdog/artemis-odb
private static boolean get(JsArrayInteger array, int bitIndex) {
// retrieve the bits for the given index
int word = getWord(array, wordIndex(bitIndex));
// shift and mask the bit out
return ((word >>> (bitOffset(bitIndex))) & 1) == 1;
}代码示例来源：origin: org.apidesign.bck2brwsr/emul
/**
* Sets the bit at the specified index to {@code true}.
*
* @param bitIndex a bit index
* @throws IndexOutOfBoundsException if the specified index is negative
* @since JDK1.0
*/
public void set(int bitIndex) {
if (bitIndex < 0)
throw new IndexOutOfBoundsException("bitIndex < 0: " + bitIndex);
int wordIndex = wordIndex(bitIndex);
expandTo(wordIndex);
words[wordIndex] |= (1L << bitIndex); // Restores invariants
checkInvariants();
}代码示例来源：origin: jtulach/bck2brwsr
/**
* Sets the bit at the specified index to {@code true}.
*
* @param bitIndex a bit index
* @throws IndexOutOfBoundsException if the specified index is negative
* @since JDK1.0
*/
public void set(int bitIndex) {
if (bitIndex < 0)
throw new IndexOutOfBoundsException("bitIndex < 0: " + bitIndex);
int wordIndex = wordIndex(bitIndex);
expandTo(wordIndex);
words[wordIndex] |= (1L << bitIndex); // Restores invariants
checkInvariants();
}代码示例来源：origin: jtulach/bck2brwsr
/**
* Sets the bit specified by the index to {@code false}.
*
* @param bitIndex the index of the bit to be cleared
* @throws IndexOutOfBoundsException if the specified index is negative
* @since JDK1.0
*/
public void clear(int bitIndex) {
if (bitIndex < 0)
throw new IndexOutOfBoundsException("bitIndex < 0: " + bitIndex);
int wordIndex = wordIndex(bitIndex);
if (wordIndex >= wordsInUse)
return;
words[wordIndex] &= ~(1L << bitIndex);
recalculateWordsInUse();
checkInvariants();
}代码示例来源：origin: org.apidesign.bck2brwsr/emul
/**
* Sets the bit specified by the index to {@code false}.
*
* @param bitIndex the index of the bit to be cleared
* @throws IndexOutOfBoundsException if the specified index is negative
* @since JDK1.0
*/
public void clear(int bitIndex) {
if (bitIndex < 0)
throw new IndexOutOfBoundsException("bitIndex < 0: " + bitIndex);
int wordIndex = wordIndex(bitIndex);
if (wordIndex >= wordsInUse)
return;
words[wordIndex] &= ~(1L << bitIndex);
recalculateWordsInUse();
checkInvariants();
}代码示例来源：origin: junkdog/artemis-odb
public BitSet(int nbits) {
this();
// throw an exception to be consistent
// but (do we want to be consistent?)
if (nbits < 0) {
throw new NegativeArraySizeException("nbits < 0: " + nbits);
}
// even though the array's length is loosely kept to that of Sun's
// "logical
// length," this might help in some cases where code uses size() to fill
// in
// bits after constructing a BitSet, or after having one passed in as a
// parameter.
setLengthWords(array, wordIndex(nbits + 31));
}代码示例来源：origin: junkdog/artemis-odb
private static void clear(JsArrayInteger array, int bitIndex) {
int index = wordIndex(bitIndex);
int word = getWord(array, index);
if (word != 0) {
// mask the correct bit out
setWord(array, index, word & ~(1 << (bitOffset(bitIndex))));
}
}代码示例来源：origin: org.apidesign.bck2brwsr/emul
/**
* Sets the bit at the specified index to the complement of its
* current value.
*
* @param bitIndex the index of the bit to flip
* @throws IndexOutOfBoundsException if the specified index is negative
* @since 1.4
*/
public void flip(int bitIndex) {
if (bitIndex < 0)
throw new IndexOutOfBoundsException("bitIndex < 0: " + bitIndex);
int wordIndex = wordIndex(bitIndex);
expandTo(wordIndex);
words[wordIndex] ^= (1L << bitIndex);
recalculateWordsInUse();
checkInvariants();
}代码示例来源：origin: jtulach/bck2brwsr
/**
* Sets the bit at the specified index to the complement of its
* current value.
*
* @param bitIndex the index of the bit to flip
* @throws IndexOutOfBoundsException if the specified index is negative
* @since 1.4
*/
public void flip(int bitIndex) {
if (bitIndex < 0)
throw new IndexOutOfBoundsException("bitIndex < 0: " + bitIndex);
int wordIndex = wordIndex(bitIndex);
expandTo(wordIndex);
words[wordIndex] ^= (1L << bitIndex);
recalculateWordsInUse();
checkInvariants();
}代码示例来源：origin: junkdog/artemis-odb
private static void set(JsArrayInteger array, int bitIndex) {
int index = wordIndex(bitIndex);
array.set(index, getWord(array, index) | (1 << (bitOffset(bitIndex))));
}代码示例来源：origin: junkdog/artemis-odb
private static void flip(JsArrayInteger array, int bitIndex) {
// calculate index and offset
int index = wordIndex(bitIndex);
int offset = bitOffset(bitIndex);
// figure out if the bit is on or off
int word = getWord(array, index);
if (((word >>> offset) & 1) == 1) {
// if on, turn it off
setWord(array, index, word & ~(1 << offset));
} else {
// if off, turn it on
array.set(index, word | (1 << offset));
}
};代码示例来源：origin: junkdog/artemis-odb
private static void set(JsArrayInteger array, int fromIndex, int toIndex) {
int first = wordIndex(fromIndex);
int last = wordIndex(toIndex);
int startBit = bitOffset(fromIndex);
int endBit = bitOffset(toIndex);
if (first == last) {
// set the bits in between first and last
maskInWord(array, first, startBit, endBit);
} else {
// set the bits from fromIndex to the next 32 bit boundary
if (startBit != 0) {
maskInWord(array, first++, startBit, 32);
}
// set the bits from the last 32 bit boundary to the toIndex
if (endBit != 0) {
maskInWord(array, last, 0, endBit);
}
//
// set everything in between
//
for (int i = first; i < last; i++) {
array.set(i, 0xffffffff);
}
}
}代码示例来源：origin: junkdog/artemis-odb
public int nextClearBit(int fromIndex) {
checkIndex(fromIndex);
int index = wordIndex(fromIndex);
// special case for first index
int fromBit = fromIndex - (bitIndex(index));
int word = getWord(array, index);
for (int i = fromBit; i < 32; i++) {
if ((word & (1 << i)) == 0) {
return (bitIndex(index)) + i;
}
}
// loop through the rest
while (true) {
index++;
word = getWord(array, index);
if (word != 0xffffffff) {
return (bitIndex(index)) + Integer.numberOfTrailingZeros(~word);
}
}
}代码示例来源：origin: junkdog/artemis-odb
public int nextSetBit(int fromIndex) {
checkIndex(fromIndex);
int index = wordIndex(fromIndex);
// check the current word
int word = getWord(array, index);
if (word != 0) {
for (int i = bitOffset(fromIndex); i < 32; i++) {
if ((word & (1 << i)) != 0) {
return (bitIndex(index)) + i;
}
}
}
index++;
// find the next set word
trimToSize(array);
index = nextSetWord(array, index);
if (index == -1) {
return -1;
}
// return the next set bit
return (bitIndex(index))
+ Integer.numberOfTrailingZeros(array.get(index));
};内容来源于网络，如有侵权，请联系作者删除！
