package parallelStream; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; import java.util.stream.Stream; public class NonInterference { public static void main(String[] args) { List l = new ArrayList(Arrays.asList("one", "two")); Stream sl = l.stream(); l.add("three"); String s = sl.collect(Collectors.joining(" ")); System.out.println(s); } }