Here you can find the source of stream(Iterable extends A> iterable)
@SuppressWarnings({ "unchecked" }) public static <A> Stream<A> stream(Iterable<? extends A> iterable)
//package com.java2s; /*//from w w w .j a v a2 s .c o m * Copyright 2015 kamekoopa * * 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.*; import java.util.stream.*; public class Main { @SuppressWarnings({ "unchecked" }) public static <A> Stream<A> stream(Iterable<? extends A> iterable) { return StreamSupport.stream((Spliterator<A>) iterable.spliterator(), false); } }