java8 Stream

import java.util.Collection;
import java.util.HashSet;


public class CollectionStream {
	public static void main(String[] args) {
		Collection books = new HashSet();
		books.add("java");
		books.add("疯狂");
		books.add("C");
		System.out.println(books.stream().filter(ele->((String)ele).contains("疯狂")).count());
		System.out.println(books.stream().filter(ele->((String)ele).length()>1).count());
		books.stream().mapToInt(ele->((String)ele).length()).forEach(System.out::println);
	}
}