Stream to LinkedHashSet [duplicate]

Question

I want to save .csv to LinkedHashSet with natural order, so the first line of the .csv should be a first element of the LinkedHashSet.

the file look like this:

java   c   c++   assembly language   swift   

and my code like this:

public class test {        public static void main(String[] args) throws IOException {                   final Charset ENCODING = Charset.forName("Cp1250");          Path fileToLoad = Paths.get("src/main/resources/test.csv");          Set<String> x = Files.lines(fileToLoad, ENCODING)                  .map(Function.identity())                  .collect(Collectors.toSet());           Iterator<String> it = x.iterator();          while(it.hasNext()) {              System.out.println(it.next());          }     } } 

but it returns incorrect order:

assembly language c++ java c swift 

I think that stream just save it as HashSet.

Is it possible to save it as LinkedHashSet with stream?

Answer 1

You simply don't know the specific type created by that factory method (it guarantees to return Set, nothing else).

The only reliable way is to actually control what happens, by ending the stream operation with

... collect( Collectors.toCollection( LinkedHashSet::new ) );