Java tutorial
//package com.java2s; /* GNU LESSER GENERAL PUBLIC LICENSE Copyright (C) 2006 The Lobo Project This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Contact info: lobochief@users.sourceforge.net */ import java.util.Iterator; import java.util.NoSuchElementException; public class Main { public static <T> Iterator<T> singletonIterator(final T item) { return new Iterator<T>() { private boolean gotItem = false; public boolean hasNext() { return !this.gotItem; } public T next() { if (this.gotItem) { throw new NoSuchElementException(); } this.gotItem = true; return item; } public void remove() { if (!this.gotItem) { this.gotItem = true; } else { throw new NoSuchElementException(); } } }; } }