本文整理了Java中io.vavr.collection.HashSet类的一些代码示例，展示了HashSet类的具体用法。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。HashSet类的具体详情如下：
包路径：io.vavr.collection.HashSet
类名称：HashSet

HashSet介绍

[英]An immutable HashSet implementation.
[中]不可变的哈希集实现。

代码示例

代码示例来源：origin: vavr-io/vavr

/**
 * Alias for {@link HashSet#of(Object)}
 *
 * @param <T>     Component type of element.
 * @param element An element.
 * @return A new {@link HashSet} instance containing the given element
 */
public static <T> Set<T> Set(T element) {
  return HashSet.of(element);
}

代码示例来源：origin: vavr-io/vavr

@Override
public HashSet<T> filter(Predicate<? super T> predicate) {
  Objects.requireNonNull(predicate, "predicate is null");
  final HashSet<T> filtered = HashSet.ofAll(iterator().filter(predicate));
  if (filtered.isEmpty()) {
    return empty();
  } else if (filtered.length() == length()) {
    return this;
  } else {
    return filtered;
  }
}

代码示例来源：origin: vavr-io/vavr

/**
 * Returns a singleton {@code HashSet}, i.e. a {@code HashSet} of one element.
 *
 * @param element An element.
 * @param <T>     The component type
 * @return A new HashSet instance containing the given element
 */
public static <T> HashSet<T> of(T element) {
  return HashSet.<T> empty().add(element);
}

代码示例来源：origin: vavr-io/vavr

@Override
public HashSet<T> orElse(Iterable<? extends T> other) {
  return isEmpty() ? ofAll(other) : this;
}

代码示例来源：origin: vavr-io/vavr

@Override
public HashSet<T> take(int n) {
  if (n >= size() || isEmpty()) {
    return this;
  } else if (n <= 0) {
    return empty();
  } else {
    return ofAll(() -> iterator().take(n));
  }
}

代码示例来源：origin: resilience4j/resilience4j

@Test
public void testExportsCircuitBreakerStates() {
  // Given
  final CollectorRegistry registry = new CollectorRegistry();
  final Bulkhead bulkhead = Bulkhead.ofDefaults("foo");
  BulkheadExports.ofIterable("boo_bulkhead", singletonList(bulkhead)).register(registry);
  final Supplier<Map<String, Double>> values = () -> HashSet
      .of("available_concurrent_calls")
      .map(param ->
          Tuple.of(param, registry.getSampleValue(
              "boo_bulkhead",
              new String[]{"name", "param"},
              new String[]{"foo", param})))
      .toMap(t -> t);
  // When
  final Map<String, Double> initialValues = values.get();
  // Then
  assertThat(initialValues).isEqualTo(HashMap.of("available_concurrent_calls", 25.0));
}

代码示例来源：origin: vavr-io/vavr

@Override
public HashSet<T> drop(int n) {
  if (n <= 0) {
    return this;
  } else {
    return HashSet.ofAll(iterator().drop(n));
  }
}

代码示例来源：origin: vavr-io/vavr

@Override
public <U> HashSet<U> flatMap(Function<? super T, ? extends Iterable<? extends U>> mapper) {
  Objects.requireNonNull(mapper, "mapper is null");
  if (isEmpty()) {
    return empty();
  } else {
    final HashArrayMappedTrie<U, U> that = foldLeft(HashArrayMappedTrie.empty(),
        (tree, t) -> addAll(tree, mapper.apply(t)));
    return new HashSet<>(that);
  }
}

代码示例来源：origin: vavr-io/vavr

@Override
public HashSet<T> intersect(Set<? extends T> elements) {
  Objects.requireNonNull(elements, "elements is null");
  if (isEmpty() || elements.isEmpty()) {
    return empty();
  } else {
    final int size = size();
    if (size <= elements.size()) {
      return retainAll(elements);
    } else {
      final HashSet<T> results = HashSet.<T> ofAll(elements).retainAll(this);
      return (size == results.size()) ? this : results;
    }
  }
}

代码示例来源：origin: vavr-io/vavr

/**
 * Creates a HashSet that contains the elements of the given {@link java.util.stream.Stream}.
 *
 * @param javaStream A {@link java.util.stream.Stream}
 * @param <T>        Component type of the Stream.
 * @return A HashSet containing the given elements in the same order.
 */
public static <T> HashSet<T> ofAll(java.util.stream.Stream<? extends T> javaStream) {
  Objects.requireNonNull(javaStream, "javaStream is null");
  return HashSet.ofAll(Iterator.ofAll(javaStream.iterator()));
}

代码示例来源：origin: vavr-io/vavr

/**
 * Alias for {@link HashSet#empty()}
 *
 * @param <T> Component type of element.
 * @return A singleton instance of empty {@link HashSet}
 */
public static <T> Set<T> Set() {
  return HashSet.empty();
}

代码示例来源：origin: vavr-io/vavr

@Override
public HashSet<T> dropWhile(Predicate<? super T> predicate) {
  Objects.requireNonNull(predicate, "predicate is null");
  final HashSet<T> dropped = HashSet.ofAll(iterator().dropWhile(predicate));
  return dropped.length() == length() ? this : dropped;
}

代码示例来源：origin: vavr-io/vavr-jackson

@Test
public void testHashSet() throws Exception {
  HashSet<A> src = HashSet.of(new B("a", "b"));
  String json = MAPPER.writeValueAsString(new HashSetPojo().setValue(src));
  Assert.assertEquals(json, "{\"value\":[{\"ExtFieldsPojoTest$B\":{\"a\":\"a\",\"b\":\"b\"}}]}");
  HashSetPojo pojo = MAPPER.readValue(json, HashSetPojo.class);
  HashSet<A> restored = pojo.getValue();
  Assert.assertEquals(restored.filter(e -> e instanceof B).length(), 1);
  Assert.assertEquals(restored.head().a, "a");
  Assert.assertEquals(((B) restored.head()).b, "b");
}

代码示例来源：origin: com.pragmaticobjects.oo.data/data-core

@Override
public boolean process(java.util.Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
  processingEnv.getElementUtils();
  for (TypeElement annotation : annotations) {
    Manifest manifest = HashSet.of(roundEnv)
        .flatMap(env -> env.getElementsAnnotatedWith(annotation))
        .map(e -> (PackageElement) e)
        .map(e -> new ManifestFromPackageElement(e))
        .transform(ms -> new ManifestCombined(ms));
        for(Declaration<A> declaration : manifest.declarations(annotationType)) {
      task.sourceFiles(declaration, manifest, processingEnv).forEach(SourceFile::generate);
    }
  }
  return false;
}

代码示例来源：origin: vavr-io/vavr-jackson

@Test
public void testHashSet() throws Exception {
  HashSet<I> src = HashSet.of(new B());
  String json = MAPPER.writeValueAsString(new HashSetPojo().setValue(src));
  Assert.assertEquals(json, "{\"value\":[{\"type\":\"b\"}]}");
  HashSetPojo pojo = MAPPER.readValue(json, HashSetPojo.class);
  HashSet<I> restored = pojo.getValue();
  Assert.assertEquals(restored.filter(e -> e instanceof B).length(), 1);
}

代码示例来源：origin: vavr-io/vavr-jackson

public BeanObjectOptional(boolean empty) {
    if (empty) {
      charSeq = CharSeq.empty();
      either = Either.left(EITHER_VALUE);
      option = Option.none();
      map = HashMap.empty();
      multimap = HashMultimap.withSeq().empty();
      seq = List.empty();
      set = HashSet.empty();
    } else {
      charSeq = CharSeq.of(CHARSEQ_VALUE);
      either = Either.right(EITHER_VALUE);
      option = Option.of(OPTION_VALUE);
      map = HashMap.of("key", MAP_VALUE);
      multimap = HashMultimap.withSeq().of("key", MULTIMAP_VALUE);
      seq = List.of(SEQ_VALUE);
      set = HashSet.of(SET_VALUE);
    }
  }
}

代码示例来源：origin: vavr-io/vavr

/**
   * {@code readResolve} method for the serialization proxy pattern.
   * <p>
   * Returns a logically equivalent instance of the enclosing class. The presence of this method causes the
   * serialization system to translate the serialization proxy back into an instance of the enclosing class
   * upon deserialization.
   *
   * @return A deserialized instance of the enclosing class.
   */
  private Object readResolve() {
    return tree.isEmpty() ? HashSet.empty() : new HashSet<>(tree);
  }
}

代码示例来源：origin: vavr-io/vavr-jackson

@Test
public void testHashSetClass() throws Exception {
  HashSetClass src = new HashSetClass(HashSet.of(new ImplementedClass()));
  String json = MAPPER.writeValueAsString(src);
  HashSetClass restored = MAPPER.readValue(json, HashSetClass.class);
  Assert.assertEquals(restored.value.head().getClass(), ImplementedClass.class);
}

代码示例来源：origin: vavr-io/vavr

/**
 * Creates a HashSet of the given elements.
 *
 * @param elements Set elements
 * @param <T>      The value type
 * @return A new HashSet containing the given entries
 */
@SuppressWarnings("unchecked")
public static <T> HashSet<T> ofAll(Iterable<? extends T> elements) {
  Objects.requireNonNull(elements, "elements is null");
  if (elements instanceof HashSet) {
    return (HashSet<T>) elements;
  } else {
    final HashArrayMappedTrie<T, T> tree = addAll(HashArrayMappedTrie.empty(), elements);
    return tree.isEmpty() ? empty() : new HashSet<>(tree);
  }
}

代码示例来源：origin: vavr-io/vavr

@Override
public LinkedHashMap<K, V> removeAll(Iterable<? extends K> keys) {
  Objects.requireNonNull(keys, "keys is null");
  final HashSet<K> toRemove = HashSet.ofAll(keys);
  final Queue<Tuple2<K, V>> newList = list.filter(t -> !toRemove.contains(t._1));
  final HashMap<K, V> newMap = map.filter(t -> !toRemove.contains(t._1));
  return newList.size() == size() ? this : wrap(newList, newMap);
}