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<E> v:
for (Enumeration<E> 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.
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.
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:
Returns an
Iterator that traverses the remaining elements
covered by this enumeration. Traversal is undefined if any methods
are called on this enumeration after the call to
asIterator.
Implementation Requirements:
The default implementation returns an
Iterator whose
hasNext method calls this Enumeration's
hasMoreElements method, whose
next
method calls this Enumeration's
nextElement method, and
whose
remove method throws
UnsupportedOperationException.
Returns:
an Iterator representing the remaining elements of this Enumeration
Since:
9
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