/**
* After this method is called, input will be read from inputStream, provided it is non-null. If
* inputStream is null, then this method has the same effect as calling readStandardInput(); that
* is, future input will come from the standard input stream.
*/
public static void readStream(InputStream inputStream) {
if (inputStream == null) readStandardInput();
else readStream(new InputStreamReader(inputStream));
}
