Here you can find the source of createStringCollection(Class
public static <T extends Collection<String>> T createStringCollection(Class<T> clazz, String... elements) throws Exception
//package com.java2s; /*//from ww w . ja v a 2s .co m * Copyright 2006-2010 the original author or authors. * * 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.Collection; public class Main { public static <T extends Collection<String>> T createStringCollection(Class<T> clazz, String... elements) throws Exception { T result = clazz.newInstance(); for (String element : elements) { result.add(element); } return result; } }