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. Enumerations are also used to specify the input streams to a SequenceInputStream.

Since:

JDK1.0

See Also:

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

Method Summary

boolean	hasMoreElements() Tests if this enumeration contains more elements.
Object	nextElement() Returns the next element of this enumeration.

Method Detail

hasMoreElements

public boolean hasMoreElements()

Tests if this enumeration contains more elements.

Returns:

true if this enumeration contains more elements; false otherwise.

Since:

JDK1.0

nextElement

public Object nextElement()

Returns the next element of this enumeration.

Returns:

the next element of this enumeration.

Throws:

NoSuchElementException - if no more elements exist.

Since:

JDK1.0