Here you can find the source of toStringArray(Collection
public static String[] toStringArray(Collection<String> strings)
//package com.java2s; /*/*from ww w .j a v a 2 s.c om*/ * #! * Ontopia Engine * #- * Copyright (C) 2001 - 2013 The Ontopia Project * #- * 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 { /** * INTERNAL: Utility method that converts a collection of strings to * an array of strings. */ public static String[] toStringArray(Collection<String> strings) { String[] _strings = new String[strings.size()]; strings.toArray(_strings); return _strings; } }