Here you can find the source of toArrayList(T... items)
@SuppressWarnings("unchecked") static public <T> List<T> toArrayList(T... items)
//package com.java2s; /**/* www .ja v a2 s. c om*/ * Copyright 2014, Emory University * * 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.ArrayList; import java.util.List; public class Main { @SuppressWarnings("unchecked") static public <T> List<T> toArrayList(T... items) { List<T> list = new ArrayList<>(items.length); for (T item : items) list.add(item); return list; } }