Here you can find the source of toArray(Enumeration
public static <A, E extends A> A[] toArray(Enumeration<E> enumeration, A[] array)
//package com.java2s; import java.util.ArrayList; import java.util.Enumeration; public class Main { /**/*from w w w .j a v a2 s.c om*/ * Marshal the elements from the given enumeration into an array of the given type. * Enumeration elements must be assignable to the type of the given array. The array * returned will be a different instance than the array given. */ public static <A, E extends A> A[] toArray(Enumeration<E> enumeration, A[] array) { ArrayList<A> elements = new ArrayList<A>(); while (enumeration.hasMoreElements()) { elements.add(enumeration.nextElement()); } return elements.toArray(array); } }