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JavaTM 2 Platform
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JAVA.UTIL
INTERFACE ENUMERATION<E>

All Known Subinterfaces: NamingEnumeration<T> All Known Implementing Classes:
StringTokenizer

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public interface Enumeration<E>

An object that implements the Enumeration interface generates a series of
elements, one at a time. Successive calls to the nextElement method return
successive elements of the series.

For example, to print all elements of a vector v:

>      for (Enumeration e = v.elements() ; e.hasMoreElements() ;) {
>          System.out.println(e.nextElement());
> 
>      }
>  

Methods are provided to enumerate through the elements of a vector, the keys of
a hashtable, and the values in a hashtable. Enumerations are also used to
specify the input streams to a SequenceInputStream.

NOTE: The functionality of this interface is duplicated by the Iterator
interface. In addition, Iterator adds an optional remove operation, and has
shorter method names. New implementations should consider using Iterator in
preference to Enumeration.





Since: JDK1.0 See Also:Iterator, SequenceInputStream, nextElement(), Hashtable,
Hashtable.elements(), Hashtable.keys(), Vector, Vector.elements()

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Method Summary  boolean hasMoreElements()
          Tests if this enumeration contains more elements.  E nextElement()
          Returns the next element of this enumeration if this enumeration
object has at least one more element to provide.

 



Method Detail


HASMOREELEMENTS

boolean hasMoreElements()

Tests if this enumeration contains more elements.



Returns:true if and only if this enumeration object contains at least one more
element to provide; false otherwise.

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NEXTELEMENT

E nextElement()

Returns the next element of this enumeration if this enumeration object has at
least one more element to provide.



Returns:the next element of this enumeration. Throws: NoSuchElementException -
if no more elements exist.

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For further API reference and developer documentation, see Java 2 SDK SE
Developer Documentation. That documentation contains more detailed,
developer-targeted descriptions, with conceptual overviews, definitions of
terms, workarounds, and working code examples.

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