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§3.11 Interface Enumeration

public  interface  java.util.Enumeration
{
        // Methods
    public abstract boolean hasMoreElements();	§3.11.1
    public abstract Object nextElement();	§3.11.2
}

An object that implements the Enumeration interface generates a series of elements, one at a time. Successive calls to the nextElement method (I-§3.11.2) 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 (I-§3.10.13), the keys of a hash table (I-§3.4.11), and the values in a hash table (I-§3.4.8). Enumerations are also used to specify the input streams to a SequenceInputStream (I-§2.21)

hasMoreElements

public abstract boolean hasMoreElements()

Returns:: true if this enumeration contains more elements; false otherwise.

nextElement

public abstract Object nextElement()

Returns:: the next element of this enumeration.
Throws: NoSuchElementException (I-§3.14); If no more elements exist.

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