EmptyIterator (Apache Commons Collections 4.2 API)

java.lang.Object
- org.apache.commons.collections4.iterators.EmptyIterator<E>

All Implemented Interfaces:

Iterator<E>, ResettableIterator<E>
```
public class EmptyIterator<E>
extends Object
implements ResettableIterator<E>
```
Provides an implementation of an empty iterator.
This class provides an implementation of an empty iterator. This class provides for binary compatibility between Commons Collections 2.1.1 and 3.1 due to issues with IteratorUtils.

Since:

2.1.1 and 3.1

Field Summary

Fields
Modifier and Type Field Description

static Iterator INSTANCE
Singleton instance of the iterator.

static ResettableIterator RESETTABLE_INSTANCE
Singleton instance of the iterator.

Constructor Summary

Constructors
Modifier Constructor Description

protected EmptyIterator()
Constructor.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`add(E obj)`
`static <E> Iterator<E>`	`emptyIterator()`	Get a typed empty iterator instance.
`boolean`	`hasNext()`
`boolean`	`hasPrevious()`
`E`	`next()`
`int`	`nextIndex()`
`E`	`previous()`
`int`	`previousIndex()`
`void`	`remove()`
`void`	`reset()`
`static <E> ResettableIterator<E>`	`resettableEmptyIterator()`	Get a typed resettable empty iterator instance.
`void`	`set(E obj)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Iterator
forEachRemaining, hasNext, next, remove

Methods inherited from interface org.apache.commons.collections4.ResettableIterator
reset

- Field Detail
  - RESETTABLE_INSTANCE
```
public static final ResettableIterator RESETTABLE_INSTANCE
```
    Singleton instance of the iterator.
    
    Since:
    
    3.1
  - INSTANCE
```
public static final Iterator INSTANCE
```
    Singleton instance of the iterator.
    
    Since:
    
    2.1.1 and 3.1
- Constructor Detail
  - EmptyIterator
```
protected EmptyIterator()
```
    Constructor.
- Method Detail
  - resettableEmptyIterator
```
public static <E> ResettableIterator<E> resettableEmptyIterator()
```
    Get a typed resettable empty iterator instance.
    
    Type Parameters:
    
    E - the element type
    
    Returns:
    
    ResettableIterator<E>
  - emptyIterator
```
public static <E> Iterator<E> emptyIterator()
```
    Get a typed empty iterator instance.
    
    Type Parameters:
    
    E - the element type
    
    Returns:
    
    Iterator<E>
  - hasNext
```
public boolean hasNext()
```
  - next
```
public E next()
```
  - hasPrevious
```
public boolean hasPrevious()
```
  - previous
```
public E previous()
```
  - nextIndex
```
public int nextIndex()
```
  - previousIndex
```
public int previousIndex()
```
  - add
```
public void add(E obj)
```
  - set
```
public void set(E obj)
```
  - remove
```
public void remove()
```
  - reset
```
public void reset()
```