Module openj9.dtfj

Package com.ibm.dtfj.phd.util

Interface LongEnumeration

All Superinterfaces:

Enumeration

public interface LongEnumeration
extends Enumeration

This interface provides an enumeration of long values. As well as the methods provided by its superclass it also offers a nextLong() method to get the value as a primitive thus avoiding the overhead of an object creation. In addition it provides an optional numberOfElements() method which returns the total number of elements in the enumeration. If this optional method is supported then the provider will return true for the hasNumberOfElements() method.

Method Summary

Modifier and Type	Method	Description
boolean	hasNumberOfElements()	Returns true if this enumeration supports the numberOfElements() method.
long	nextLong()	Returns the next long value.
int	numberOfElements()	Returns the total number of elements in this enumeration (not the remaining number!).

Methods declared in interface java.util.Enumeration

asIterator, hasMoreElements, nextElement

Method Details

nextLong

long nextLong()

Returns the next long value.

hasNumberOfElements

boolean hasNumberOfElements()

Returns true if this enumeration supports the numberOfElements() method.

numberOfElements

int numberOfElements()

Returns the total number of elements in this enumeration (not the remaining number!). Users of this method should check that hasNumberOfElements() returns true.