Java tutorial
//package com.java2s; /* * Copyright (c) Fiorano Software Pte. Ltd. and affiliates. All rights reserved. http://www.fiorano.com * The software in this package is published under the terms of the CPAL v1.0 * license, a copy of which has been included with this distribution in the * LICENSE.txt file. */ import java.util.*; public class Main { public static String suggest(Map map/*<String, Object>*/, String prefix, boolean key) { return suggest(key ? map.keySet() : map.values(), prefix); } public static String suggest(Collection c, String prefix) { int i = 1; while (c.contains(prefix + i)) i++; return prefix + i; } }