How to build a Java 8 stream from System.in / System.console()?

Question

Given a file, we can transform it into a stream of strings using, e.g.,

Stream lines = Files.lines(Paths.get(\"input.txt\"))

Answer 1

Usually the standard input is read line by line, so what you can do is store all the read line into a collection, and then create a Stream that operates on it.

For example:

List allReadLines = new ArrayList();

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
String s;
while ((s = in.readLine()) != null && s.length() != 0) {
    allReadLines.add(s);
}

Stream stream = allReadLines.stream();