Java 8 stream emitting a stream

Question

I have the following file format:

Text1
+ continuation of Text1
+ more continuation of Text1 
Text2
+ continuation of Text2
+ more continuation of Text2
+ ev         


        

Answer 1

Assuming that you run this sequentially only and really want to use streams:

 List result = Files.lines(Paths.get("YourPath"))
            .collect(() -> new ArrayList<>(), (list, line) -> {
                int listSize = list.size();
                if (line.startsWith("+ ")) {
                    list.set(listSize - 1, list.get(listSize - 1) + line.substring(2));
                } else {
                    list.add(line);
                }
            }, (left, right) -> {
                throw new RuntimeException("Not for parallel processing");
            });