java.util.Iterator.next()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
字(6.7k)|赞(0)|评价(0)|浏览(188)

本文整理了Java中java.util.Iterator.next()方法的一些代码示例，展示了Iterator.next()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。Iterator.next()方法的具体详情如下：
包路径：java.util.Iterator
类名称：Iterator
方法名：next

Iterator.next介绍

[英]Returns the next object and advances the iterator.
[中]返回下一个对象并推进迭代器。

代码示例

代码示例来源：origin: stackoverflow.com

  1. public static void printMap(Map mp) {
  2.   Iterator it = mp.entrySet().iterator();
  3.   while (it.hasNext()) {
  4.     Map.Entry pair = (Map.Entry)it.next();
  5.     System.out.println(pair.getKey() + " = " + pair.getValue());
  6.     it.remove(); // avoids a ConcurrentModificationException
  7.   }
  8. }

代码示例来源：origin: stackoverflow.com

  1. List<String> list = new ArrayList<>();
  3. // This is a clever way to create the iterator and call iterator.hasNext() like
  4. // you would do in a while-loop. It would be the same as doing:
  5. //     Iterator<String> iterator = list.iterator();
  6. //     while (iterator.hasNext()) {
  7. for (Iterator<String> iterator = list.iterator(); iterator.hasNext();) {
  8.   String string = iterator.next();
  9.   if (string.isEmpty()) {
  10.     // Remove the current element from the iterator and the list.
  11.     iterator.remove();
  12.   }
  13. }

代码示例来源：origin: iluwatar/java-design-patterns

  1. private void processPendingCommands() {
  2.  Iterator<Runnable> iterator = pendingCommands.iterator();
  3.  while (iterator.hasNext()) {
  4.   Runnable command = iterator.next();
  5.   command.run();
  6.   iterator.remove();
  7.  }
  8. }

代码示例来源：origin: iluwatar/java-design-patterns

  1. /**
  2.   * Collects the remaining objects of the given iterator into a List.
  3.   * 
  4.   * @return a new List with the remaining objects.
  5.   */
  6.  public static <E> List<E> toList(Iterator<E> iterator) {
  7.   List<E> copy = new ArrayList<>();
  8.   while (iterator.hasNext()) {
  9.    copy.add(iterator.next());
  10.   }
  11.   return copy;
  12.  }
  13. }

代码示例来源：origin: stackoverflow.com

  1. Map map = new HashMap();
  2. Iterator entries = map.entrySet().iterator();
  3. while (entries.hasNext()) {
  4.   Map.Entry entry = (Map.Entry) entries.next();
  5.   Integer key = (Integer)entry.getKey();
  6.   Integer value = (Integer)entry.getValue();
  7.   System.out.println("Key = " + key + ", Value = " + value);
  8. }

代码示例来源：origin: google/guava

  1. public void testIteratorNoSuchElementException() {
  2.   Iterator<E> iterator = collection.iterator();
  3.   while (iterator.hasNext()) {
  4.    iterator.next();
  5.   }
  7.   try {
  8.    iterator.next();
  9.    fail("iterator.next() should throw NoSuchElementException");
  10.   } catch (NoSuchElementException expected) {
  11.   }
  12.  }
  13. }

代码示例来源：origin: spring-projects/spring-framework

  1. @Override
  2. public String getPath() {
  3.   StringBuilder pathBuilder = new StringBuilder();
  4.   pathBuilder.append(PATH_DELIMITER);
  5.   for (Iterator<String> iterator = this.pathSegments.iterator(); iterator.hasNext(); ) {
  6.     String pathSegment = iterator.next();
  7.     pathBuilder.append(pathSegment);
  8.     if (iterator.hasNext()) {
  9.       pathBuilder.append(PATH_DELIMITER);
  10.     }
  11.   }
  12.   return pathBuilder.toString();
  13. }

代码示例来源：origin: apache/kafka

  1. public void clean() {
  2.   // the lock protects removal from a concurrent put which could otherwise mutate the
  3.   // queue after it has been removed from the map
  4.   synchronized (unsent) {
  5.     Iterator<ConcurrentLinkedQueue<ClientRequest>> iterator = unsent.values().iterator();
  6.     while (iterator.hasNext()) {
  7.       ConcurrentLinkedQueue<ClientRequest> requests = iterator.next();
  8.       if (requests.isEmpty())
  9.         iterator.remove();
  10.     }
  11.   }
  12. }

代码示例来源：origin: google/guava

  1. public void testAdvance_basic() {
  2.  List<String> list = newArrayList();
  3.  list.add("a");
  4.  list.add("b");
  5.  Iterator<String> iterator = list.iterator();
  6.  advance(iterator, 1);
  7.  assertEquals("b", iterator.next());
  8. }

代码示例来源：origin: google/guava

  1. @CollectionFeature.Require(FAILS_FAST_ON_CONCURRENT_MODIFICATION)
  2. @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX)
  3. public void testAddAtIndexConcurrentWithIteration() {
  4.  try {
  5.   Iterator<E> iterator = collection.iterator();
  6.   getList().add(0, e3());
  7.   iterator.next();
  8.   fail("Expected ConcurrentModificationException");
  9.  } catch (ConcurrentModificationException expected) {
  10.   // success
  11.  }
  12. }

代码示例来源：origin: google/guava

  1. private static <V extends Enum<V>> Class<V> inferValueType(Map<?, V> map) {
  2.  if (map instanceof EnumBiMap) {
  3.   return ((EnumBiMap<?, V>) map).valueType;
  4.  }
  5.  checkArgument(!map.isEmpty());
  6.  return map.values().iterator().next().getDeclaringClass();
  7. }

代码示例来源：origin: iluwatar/java-design-patterns

  1. /**
  2.  * Checkout object from pool
  3.  */
  4. public synchronized T checkOut() {
  5.  if (available.isEmpty()) {
  6.   available.add(create());
  7.  }
  8.  T instance = available.iterator().next();
  9.  available.remove(instance);
  10.  inUse.add(instance);
  11.  return instance;
  12. }

代码示例来源：origin: google/guava

  1. public void testSize_partiallyConsumed() {
  2.  Iterator<Integer> iterator = asList(1, 2, 3, 4, 5).iterator();
  3.  iterator.next();
  4.  iterator.next();
  5.  assertEquals(3, Iterators.size(iterator));
  6. }

代码示例来源：origin: iluwatar/java-design-patterns

  1. /**
  2.  * @return the count of remaining objects of the current Iterable
  3.  */
  4. public final int getRemainingElementsCount() {
  5.  int counter = 0;
  6.  Iterator<E> iterator = iterator();
  7.  while (iterator.hasNext()) {
  8.   iterator.next();
  9.   counter++;
  10.  }
  11.  return counter;
  12. }

代码示例来源：origin: google/guava

  1. @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)
  2.  @CollectionSize.Require(ONE)
  3.  public void testValuesIteratorRemove() {
  4.   Iterator<V> valuesItr = multimap().values().iterator();
  5.   valuesItr.next();
  6.   valuesItr.remove();
  7.   assertTrue(multimap().isEmpty());
  8.  }
  9. }

代码示例来源：origin: ReactiveX/RxJava

  1. @Test(expected = UnsupportedOperationException.class)
  2. public void toFlowableIterableRemove() {
  3.   @SuppressWarnings("unchecked")
  4.   Iterable<? extends Flowable<Integer>> f = SingleInternalHelper.iterableToFlowable(Arrays.asList(Single.just(1)));
  5.   Iterator<? extends Flowable<Integer>> iterator = f.iterator();
  6.   iterator.next();
  7.   iterator.remove();
  8. }

代码示例来源：origin: skylot/jadx

  1. public static void remove(List<InsnNode> list, InsnNode insn) {
  2.   for (Iterator<InsnNode> iterator = list.iterator(); iterator.hasNext(); ) {
  3.     InsnNode next = iterator.next();
  4.     if (next == insn) {
  5.       iterator.remove();
  6.       return;
  7.     }
  8.   }
  9. }

代码示例来源：origin: iluwatar/java-design-patterns

  1. /**
  2.  * Transforms this FluentIterable into a new one containing objects of the type T.
  3.  * 
  4.  * @param function a function that transforms an instance of E into an instance of T
  5.  * @param <T> the target type of the transformation
  6.  * @return a new FluentIterable of the new type
  7.  */
  8. @Override
  9. public final <T> FluentIterable<T> map(Function<? super E, T> function) {
  10.  List<T> temporaryList = new ArrayList<>();
  11.  Iterator<E> iterator = iterator();
  12.  while (iterator.hasNext()) {
  13.   temporaryList.add(function.apply(iterator.next()));
  14.  }
  15.  return from(temporaryList);
  16. }

代码示例来源：origin: google/guava

  1. @Override
  2. public boolean remove(Object o) {
  3.  Iterator<Entry<K, V>> entryItr = unfiltered.entrySet().iterator();
  4.  while (entryItr.hasNext()) {
  5.   Entry<K, V> entry = entryItr.next();
  6.   if (predicate.apply(entry) && Objects.equal(entry.getValue(), o)) {
  7.    entryItr.remove();
  8.    return true;
  9.   }
  10.  }
  11.  return false;
  12. }

代码示例来源：origin: stackoverflow.com

  1. Map<Integer, Integer> map = new HashMap<Integer, Integer>();
  2. Iterator<Map.Entry<Integer, Integer>> entries = map.entrySet().iterator();
  3. while (entries.hasNext()) {
  4.   Map.Entry<Integer, Integer> entry = entries.next();
  5.   System.out.println("Key = " + entry.getKey() + ", Value = " + entry.getValue());
  6. }

内容来源于网络，如有侵权，请联系作者删除！

Iterator

相关文章

    查看更多

    热门标签

    更多
    JavaquerypythonNode开发语言requestUtil数据库Table后端算法LoggerMessageElementParser

    最新文章

    更多
    • 蜀ICP备13028337号-1 大数据知识库 https://www.saoniuhuo.com © All rights reserved
    • 本站内容来源互联网,如果侵犯您的权益请联系我们删除, 联系方式：448109455@qq.com