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Enumeration.javaAPI DocJava SE 5 API2172Fri Aug 26 14:57:22 BST 2005java.util

Enumeration

public interface Enumeration
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.

see
java.util.Iterator
see
java.io.SequenceInputStream
see
java.util.Enumeration#nextElement()
see
java.util.Hashtable
see
java.util.Hashtable#elements()
see
java.util.Hashtable#keys()
see
java.util.Vector
see
java.util.Vector#elements()
author
Lee Boynton
version
1.22, 12/19/03
since
JDK1.0

Fields Summary
Constructors Summary
Methods Summary
public booleanhasMoreElements()
Tests if this enumeration contains more elements.

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

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

return
the next element of this enumeration.
exception
NoSuchElementException if no more elements exist.