Java inputstream never leaves

Posted on 2006-12-01
Last Modified: 2008-02-01
I'm coding a server app in Java.

I wrote data receive part in server like this:
String s;
in = new DataInputStream(client.getInputStream());

And below this code after some other processings...
  while ((i = != -1) {
                    s = s + (char) i;
System.out.println("OK! We received data part");

This code never prints out  "OK! We received data part" till I close connection from client!

So how can I read data from inputStream?

Thanks from now!
Question by:CSecurity
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LVL 23

Expert Comment

ID: 18058921
read is blocking call, will wait untill it receives data from client
LVL 23

Accepted Solution

Ajay-Singh earned 250 total points
ID: 18058923
it happens when
a. client closes the connection
b. you close the OutputStream of client
LVL 23

Expert Comment

ID: 18058926
You should define boundry of the request and read till that point.
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LVL 17

Author Comment

ID: 18058929
b. you close the OutputStream of client
How? My client is coded in VB6.

And is there another call or reading method which can leave in inputstream?
LVL 17

Author Comment

ID: 18058931
P.S please tell me exit while code.... (in while how can I exit) in VB I write-> exit for. exit do or...

LVL 23

Expert Comment

ID: 18058949
Not sure how you can close output fd in VB. If you are expecting data from the client in terms of line, you can use readLine() function
LVL 17

Author Comment

ID: 18058951
how to exit while() loop? I should use return?
LVL 13

Assisted Solution

marchent earned 200 total points
ID: 18059098
suppose u wanna break when i = -1, then use this code

while( ...condition..)
   if(i == -1) break;

it will get u out from while loop

LVL 23

Expert Comment

ID: 18059872
Assuming that from VB program, you are trying to send the commands line by line,
i would suggest to use the following:

String command = in.readLine();
// Work on the command

Do NOT read char by char
LVL 35

Assisted Solution

girionis earned 50 total points
ID: 18060072
> how to exit while() loop? I should use return?

You can use return if you want ot return a value, you can even use it to exit the loop (and also the whole method). If you only want to exit the loop follow marchent's suggestion a use break;

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