Question

Is there a way to flush the input stream in Java, perhaps prior to closing it? In relation to
iteratively invoking the statements below, while reading several files on disk

InputStream fileStream = item.openStream();
fileStream.close;

Answer 1

InputStream cannot be flushed. Why do you want to do this?
OutputStream can be flushed as it implements the interface Flushable. Flushing makes IMHO only sense in scenarios where data is written (to force a write of buffered data). Please see the documentation of Flushable for all implementing classes.