EmptyEnumeration

java.lang.Object

de.intarsys.tools.collection.EmptyEnumeration

All Implemented Interfaces:: Enumeration

public class EmptyEnumeration extends Object implements Enumeration

An Enumeration without elements.

Field Summary

Fields

Modifier and Type

Field

Description

static final Enumeration

UNIQUE
Constructor Summary

Constructors

Modifier

Constructor

Description

protected

EmptyEnumeration()

Create an emtpy enumeration
Method Summary

Modifier and Type

Method

Description

boolean

hasMoreElements()

Return always false as an emtpy enumeration has no elements.

Object

nextElement()

Throw always exception, as an empty enumeration has no elements.

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

Methods inherited from interface java.util.Enumeration
asIterator

Field Details
- UNIQUE
  
  public static final Enumeration UNIQUE
Constructor Details
- EmptyEnumeration
  
  protected EmptyEnumeration()
  
  Create an emtpy enumeration
Method Details
- hasMoreElements
  
  public boolean hasMoreElements()
  
  Return always false as an emtpy enumeration has no elements.
  
  Specified by:
  
  hasMoreElements in interface Enumeration
  
  Returns:
  
  Return always false as an emtpy enumeration has no elements.
- nextElement
  
  public Object nextElement()
  
  Throw always exception, as an empty enumeration has no elements.
  
  Specified by:
  
  nextElement in interface Enumeration
  
  Returns:
  
  never
  
  Throws:
  
  NoSuchElementException - Is thrown always