NoSuchElementException if no more tokens are available

Do not use scanner.close() <- source of your error!

remove the lines scanner.close() and newScanner.close()

From Java DOCs:

When a Scanner is closed, it will close its input source if the source implements the Closeable interface.

Which means it closes the System.in – bad choice!

From source code of Scanner.java in JDK, throwFor() is:

private void throwFor() {
    skipped = false;
    if ((sourceClosed) && (position == buf.limit()))
        throw new NoSuchElementException();
    else
        throw new InputMismatchException();
}

Clearly, if we have reached the end of input, OR if the source is closed, then we get the NoSuchElementException(). I am pretty sure the one at IDEONE has happened because of position == buf.limit() rather than sourceClosed