org.apache.flink.runtime.util

类 EmptyIterator<E>

java.lang.Object

org.apache.flink.runtime.util.EmptyIterator<E>

所有已实现的接口:

Iterable<E>, Iterator<E>

public final class EmptyIterator<E>
extends Object
implements Iterator<E>, Iterable<E>

An empty iterator that never returns anything.

构造器概要

构造器

构造器和说明
EmptyIterator()

方法概要

限定符和类型	方法和说明
static <E> EmptyIterator<E>	get() Gets a singleton instance of the empty iterator.
boolean	hasNext() Always returns false, since this iterator is empty.
Iterator<E>	iterator()
E	next() Always throws a NoSuchElementException.
void	remove() Throws a UnsupportedOperationException.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 java.util.Iterator

forEachRemaining

从接口继承的方法 java.lang.Iterable

forEach, spliterator

构造器详细资料

EmptyIterator

public EmptyIterator()

方法详细资料

get

public static <E> EmptyIterator<E> get()

Gets a singleton instance of the empty iterator.

类型参数:

E - The type of the objects (not) returned by the iterator.

返回:

An instance of the iterator.

hasNext

public boolean hasNext()

Always returns false, since this iterator is empty.

指定者:

hasNext 在接口中 Iterator<E>

另请参阅:

Iterator.hasNext()

next

public E next()

Always throws a NoSuchElementException.

指定者:

next 在接口中 Iterator<E>

另请参阅:

Iterator.next()

remove

public void remove()

Throws a UnsupportedOperationException.

指定者:

remove 在接口中 Iterator<E>

另请参阅:

Iterator.remove()

iterator

public Iterator<E> iterator()

指定者:

iterator 在接口中 Iterable<E>