java.util
Interface Enumeration

All Known Implementing Classes:

StringTokenizer

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.

Since:

JDK1.0, CLDC 1.0

Version:

12/17/01 (CLDC 1.1)

See Also:

nextElement(), Hashtable, Hashtable.elements(), Hashtable.keys(), Vector, Vector.elements()

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.

nextElement

Object 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.