Java tutorial
//package com.java2s; /******************************************************************************* * Copyright (c) 2008 The University of York. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Dimitrios Kolovos - initial API and implementation ******************************************************************************/ import java.util.ArrayList; import java.util.Collection; public class Main { public static Collection<?> asCollection(Object o) { if (o instanceof Collection) { return (Collection<?>) o; } else { ArrayList<Object> list = new ArrayList<Object>(); list.add(o); return list; } } }