Java tutorial
//package com.java2s; /** * ================================================================================= * * BSD LICENCE (http://en.wikipedia.org/wiki/BSD_licenses) * * ARTIFACT='barchart-udt4';VERSION='1.0.2-SNAPSHOT';TIMESTAMP='2011-01-11_09-30-59'; * * Copyright (C) 2009-2011, Barchart, Inc. (http://www.barchart.com/) * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * * Neither the name of the Barchart, Inc. nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Developers: Andrei Pozolotin; * * ================================================================================= */ import java.util.Collection; import java.util.Iterator; import java.util.Set; public class Main { static <E> Set<E> ungrowableSet(final Set<E> s) { return new Set<E>() { @Override public int size() { return s.size(); } @Override public boolean isEmpty() { return s.isEmpty(); } @Override public boolean contains(Object o) { return s.contains(o); } @Override public Object[] toArray() { return s.toArray(); } @Override public <T> T[] toArray(T[] a) { return s.toArray(a); } @Override public String toString() { return s.toString(); } @Override public Iterator<E> iterator() { return s.iterator(); } @Override public boolean equals(Object o) { return s.equals(o); } @Override public int hashCode() { return s.hashCode(); } @Override public void clear() { s.clear(); } @Override public boolean remove(Object o) { return s.remove(o); } @Override public boolean containsAll(Collection<?> coll) { return s.containsAll(coll); } @Override public boolean removeAll(Collection<?> coll) { return s.removeAll(coll); } @Override public boolean retainAll(Collection<?> coll) { return s.retainAll(coll); } @Override public boolean add(E o) { throw new UnsupportedOperationException(); } @Override public boolean addAll(Collection<? extends E> coll) { throw new UnsupportedOperationException(); } }; } }