EmptyIterator (Apache Commons Collections 3.2.2 API)

java.lang.Object
- org.apache.commons.collections.iterators.EmptyIterator

All Implemented Interfaces:

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

Since:

Commons Collections 2.1.1 and 3.1

Version:

$Revision: 972404 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $

Author:

Stephen Colebourne

Field Summary

Fields
Modifier and Type	Field and Description
`static Iterator`	`INSTANCE` Singleton instance of the iterator.
`static ResettableIterator`	`RESETTABLE_INSTANCE` Singleton instance of the iterator.

Constructor Summary

Constructors
Modifier Constructor and Description

protected EmptyIterator()
Constructor.

Constructors
Modifier	Constructor and Description
`protected`	`EmptyIterator()` Constructor.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`add(Object obj)`
`Object`	`getKey()`
`Object`	`getValue()`
`boolean`	`hasNext()`
`boolean`	`hasPrevious()`
`Object`	`next()`
`int`	`nextIndex()`
`Object`	`previous()`
`int`	`previousIndex()`
`void`	`remove()`
`void`	`reset()`
`void`	`set(Object obj)`
`Object`	`setValue(Object value)`

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

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

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

Field Detail
- RESETTABLE_INSTANCE
```
public static final ResettableIterator RESETTABLE_INSTANCE
```
  Singleton instance of the iterator.
  
  Since:
  
  Commons Collections 3.1
- INSTANCE
```
public static final Iterator INSTANCE
```
  Singleton instance of the iterator.
  
  Since:
  
  Commons Collections 2.1.1 and 3.1

Constructor Detail
- EmptyIterator
```
protected EmptyIterator()
```
  Constructor.

Method Detail

hasNext
```
public boolean hasNext()
```

next
```
public Object next()
```

hasPrevious
```
public boolean hasPrevious()
```

previous
```
public Object previous()
```

nextIndex
```
public int nextIndex()
```

previousIndex
```
public int previousIndex()
```

add
```
public void add(Object obj)
```

set
```
public void set(Object obj)
```

remove
```
public void remove()
```

getKey
```
public Object getKey()
```

getValue
```
public Object getValue()
```

setValue
```
public Object setValue(Object value)
```

reset
```
public void reset()
```

Class EmptyIterator

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.apache.commons.collections.ResettableIterator

Methods inherited from interface java.util.Iterator

Field Detail

RESETTABLE_INSTANCE

INSTANCE

Constructor Detail

EmptyIterator

Method Detail

hasNext

next

hasPrevious

previous

nextIndex

previousIndex

add

set

remove

getKey

getValue

setValue

reset