Java tutorial
//package com.java2s; /** * 2014 Brien Coffield * * This file is subject to the terms and conditions defined in * file 'LICENSE', which is part of this source code package. */ import java.net.URL; import java.util.Map; public class Main { public static URL getLargestImageURL(Map<String, URL> imageURLs) { if (imageURLs == null) { return null; } URL result = imageURLs.get("large"); if (result != null) { return result; } result = imageURLs.get("medium"); if (result != null) { return result; } return imageURLs.get("small"); } }