Are inputstream and outputstream independent of eachother ?

Question

<b><u>Code snippet 1) </u></b><br>
ByteArrayInputStream inputPDFStream = (ByteArrayInputStream) <SOME INPUT STREAM OBJECT>;<br>
byte [] bArray = new byte [inputPDFStream.available()];<br>
//Reading into byte array.<br>
inputPDFStream.read( bArray );<br>
//Dumping byte array contents onto file system.<br>
File file = new File("//exchange//EPP//template//test_PDF_OnPortal.pdf");<br>
FileOutputStream os = new FileOutputStream(file);<br>
os.write(bArray);<br>
os.flush();<br>
os.close();<br>
//Closing input stream, after all operations have been performed.<br>
<b>inputPDFStream.close();</b><br>
<br>
<b><u>Code snippet 2)</u></b><br>
ByteArrayInputStream inputPDFStream = (ByteArrayInputStream)pdfObject.createPDF();<br>
byte [] bArray = new byte [inputPDFStream.available()];<br>
int iBytesRead = inputPDFStream.read( bArray );<br>
/*************** change starts here ************/<br>
//Closing input stream immediately after it has been read from.<br>
<b>inputPDFStream.close();</b><br>
/*************** change ends here ************/<br>
File file = new File("//exchange//EPP//template//test_PDF_OnPortal.pdf");<br>
FileOutputStream os = new FileOutputStream(file);<br>
os.write(bArray);<br>
os.flush();<br>
os.close();<br>
/*************** change starts here ************/<br>
// commented this line of code and shifted it above.<br>
<b>//inputPDFStream.close(); </b><br>
/*************** change ends here ************/<br>
<br><br>               
<b><u>Questions -</u></b> <br>
<br>
1) Are inputstream and outputstream objects totally independent of eachother ?<br>
2) Will the change in the position of the "inputstream.close()" method as shown above, affect the writing of the file to the file system ?
In other words, will the outcome of an "FileOutputStream.write(), flush() or close()" depend on when the inputstream object is closed as seen in code snippet (2) ?<br>
3) Assuming that the output buffer is flushed, will any data that you try to write using the OutputStream.write() method, be written to the outputstream target (whether a file, or response object), irrespective of whether the inputstream is active at that point of time ??<br>
<br>
Thanks,<br>
Navneet.<br>
Changes made by -

Answer 1

Hey kaj...Do you have any idea about the "not normal"
situations in which case the input and output streams
might influence eachother ? ;)Those cases are when both streams comes from a resource which closes both streams when one of them is closed. It's very rare to see, but I've seen some socket implementations which does that.
Kaj