本文整理了Java中java.util.stream.IntStream.filter()
方法的一些代码示例,展示了IntStream.filter()
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。IntStream.filter()
方法的具体详情如下:
包路径:java.util.stream.IntStream
类名称:IntStream
方法名:filter
[英]Returns a stream consisting of the elements of this stream that match the given predicate.
This is an intermediate operation.
[中]
代码示例来源:origin: shekhargulati/99-problems
public static List<Integer> primeFactors(int number) {
List<Integer> fs = new ArrayList<>();
IntStream.rangeClosed(2, number / 2).filter(P31::isPrime).forEach(f -> {
int n = number;
while (n % f == 0) {
n = n / f;
fs.add(f);
}
});
return fs;
}
}
代码示例来源:origin: shekhargulati/99-problems
public static List<SimpleEntry<Integer, List<Integer>>> goldbach_list(IntStream range) {
return range
.filter(n -> n % 2 == 0)
.filter(even -> even > 2)
.mapToObj(even -> new SimpleEntry<>(even, P35.goldbach(even)))
.collect(toList());
}
代码示例来源:origin: stackoverflow.com
Set<Integer> chars = new HashSet<>();
String s = /* Your lowercase string */;
s.length > 25 && s.chars()
.filter(i -> i >= 'a' && i <= 'z') //only alphabet
.filter(chars::add) //add to our tracking set if we reach this point
.filter(i -> chars.size() == 26) //filter the 26th letter found
.findAny().isPresent(); //if the 26th is found, return
代码示例来源:origin: SonarSource/sonarqube
@CheckForNull
private static String removeCharZeros(@Nullable String str) {
if (str == null || str.isEmpty()) {
return str;
}
return str.codePoints()
.filter(c -> c != "\u0000".codePointAt(0))
.collect(StringBuilder::new, StringBuilder::appendCodePoint, StringBuilder::append)
.toString();
}
}
代码示例来源:origin: SonarSource/sonarqube
void addBlock(TextBlock textBlock) {
Boolean[] newBlock = new Boolean[] {false};
IntStream.rangeClosed(textBlock.getStart(), textBlock.getEnd())
.filter(changedLines::contains)
.forEach(line -> {
lineCounts.add(line);
newBlock[0] = true;
});
if (newBlock[0]) {
blockCounts++;
}
}
代码示例来源:origin: prestodb/presto
@VisibleForTesting
List<Page> getBufferedPages()
{
return IntStream.range(0, currentPageCount)
.filter(i -> pageReferences.get(i) != null)
.mapToObj(i -> pageReferences.get(i).getPage())
.collect(toImmutableList());
}
代码示例来源:origin: apache/incubator-druid
@Override
public long estimateEncodedKeyComponentSize(int[] key)
{
// string length is being accounted for each time they are referenced, based on dimension handler interface,
// even though they are stored just once. It may overestimate the size by a bit, but we wanted to leave
// more buffer to be safe
long estimatedSize = key.length * Integer.BYTES;
estimatedSize += Arrays.stream(key)
.filter(element -> dimLookup.getValue(element) != null)
.mapToLong(element -> dimLookup.getValue(element).length() * Character.BYTES)
.sum();
return estimatedSize;
}
代码示例来源:origin: SonarSource/sonarqube
private static Optional<Changeset> getLatestChangeset(Component component, ScmInfo scmInfo, DefaultIssue issue) {
Optional<Changeset> mostRecentChangeset = IssueLocations.allLinesFor(issue, component.getUuid())
.filter(scmInfo::hasChangesetForLine)
.mapToObj(scmInfo::getChangesetForLine)
.max(Comparator.comparingLong(Changeset::getDate));
if (mostRecentChangeset.isPresent()) {
return mostRecentChangeset;
}
return Optional.of(scmInfo.getLatestChangeset());
}
代码示例来源:origin: shekhargulati/99-problems
public static long phi(int m) {
return IntStream.rangeClosed(1, m).filter(r -> P38.coprime(r, m)).count();
}
}
代码示例来源:origin: apache/incubator-druid
MergingRowIterator(List<TransformableRowIterator> iterators)
{
iterators.forEach(closer::register);
originalIterators = new TransformableRowIterator[iterators.size()];
pQueue = IntStream
.range(0, iterators.size())
.filter(indexNum -> iterators.get(indexNum).moveToNext())
.mapToObj(indexNum -> {
TransformableRowIterator rowIterator = iterators.get(indexNum);
// Can call rowIterator.getPointer() only here, after moveToNext() returned true on the filter() step
rowIterator.getPointer().setIndexNum(indexNum);
originalIterators[indexNum] = rowIterator;
return rowIterator;
})
.toArray(RowIterator[]::new);
equalToChild = new boolean[pQueue.length];
heapify();
initEqualToChildStates();
}
代码示例来源:origin: google/error-prone
private boolean isProbablyType(String name) {
Symbol typeSymbol = FindIdentifiers.findIdent(name, state, KindSelector.TYP);
return typeSymbol instanceof TypeSymbol
|| name.chars().filter(c -> c == '.').count() >= 3
|| name.contains("#");
}
代码示例来源:origin: SonarSource/sonarqube
@DataProvider
public static Object[][] illegalDatasetIdLengths() {
return IntStream.range(1, UUID_DATASET_ID_LENGTH + new Random().nextInt(5))
.filter(i -> i != UUID_DATASET_ID_LENGTH)
.filter(i -> i != NOT_UUID_DATASET_ID_LENGTH)
.filter(i -> i != DEPRECATED_SERVER_ID_LENGTH)
.mapToObj(i -> new Object[] {i})
.toArray(Object[][]::new);
}
代码示例来源:origin: prestodb/presto
static <T> List<T> without(List<T> list, Collection<Integer> indexes)
{
Set<Integer> indexesSet = ImmutableSet.copyOf(indexes);
return IntStream.range(0, list.size())
.filter(index -> !indexesSet.contains(index))
.mapToObj(list::get)
.collect(toImmutableList());
}
代码示例来源:origin: Vedenin/useful-java-links
@Benchmark
public long java8_1() {
// Using Java8 (case 2)
return testString.codePoints().filter(ch -> ch == '.').count();
}
代码示例来源:origin: Vedenin/useful-java-links
@Benchmark
public long java8() {
// Using Java8
return testString.chars().filter(ch -> ch =='.').count();
}
代码示例来源:origin: Vedenin/useful-java-links
@Benchmark
public long java8_1() {
// Using Java8 (case 2)
return testString.codePoints().filter(ch -> ch == '.').count();
}
代码示例来源:origin: Vedenin/useful-java-links
@Benchmark
public long java8() {
// Using Java8
return testString.chars().filter(ch -> ch =='.').count();
}
代码示例来源:origin: SonarSource/sonarqube
@DataProvider
public static Object[][] illegalDatabaseIdLengths() {
return IntStream.range(1, 8 + new Random().nextInt(5))
.filter(i -> i != DATABASE_ID_LENGTH)
.mapToObj(i -> new Object[] {i})
.toArray(Object[][]::new);
}
代码示例来源:origin: apache/incubator-druid
/**
* Find the index of valueIndices which is {@link IndexedInts} returned from {@link #getValueSelector()#getRow()}
* corresponding to the {@link #subColumnName}.
*
* @return index for valueIndices if found. -1 otherwise.
*/
private int findValueIndicesIndexForSubColumn()
{
final DimensionSelector keySelector = getKeySelector();
final DimensionSelector valueSelector = getValueSelector();
final IndexedInts keyIndices = keySelector.getRow();
final IndexedInts valueIndices = valueSelector.getRow();
final int limit = Math.min(keyIndices.size(), valueIndices.size());
return IntStream
.range(0, limit)
.filter(i -> subColumnName.equals(keySelector.lookupName(keyIndices.get(i)))) // subColumnName is never null
.findAny()
.orElse(-1);
}
代码示例来源:origin: apache/ignite
/** */
private static int keyInDifferentPartition(Ignite ignite, String cacheName, int key) {
Affinity<Object> affinity = ignite.affinity(cacheName);
return IntStream.iterate(key + 1, i -> i + 1)
.filter(i -> affinity.partition(i) != affinity.partition(key))
.findFirst().getAsInt();
}
}
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