Java tutorial
//package com.java2s; /* * Copyright (C) 2008 Romain Guy * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.util.Iterator; import java.util.Collection; public class Main { public static String join(Collection<?> items, String delimiter) { if (items == null || items.isEmpty()) { return ""; } final Iterator<?> iter = items.iterator(); final StringBuilder buffer = new StringBuilder(iter.next().toString()); while (iter.hasNext()) { buffer.append(delimiter).append(iter.next()); } return buffer.toString(); } }