How to read output of native program

Hi,
I wrote a Java program that runs a native program. In my case, the native program is written in C++ and runs under Linux.
My purpose is, to start the native program and to capture the output of it and send also some input.
I found the code to do this on this website. I used the Process and Runtime classes to start my native program, The I used the following code the intercept the output of the program:
BufferedReader pInput = new BufferedReader(new InputStreamRead(process.getInputStream));
This code works perfectly fine for a native program that does his job and then exit. I guess the the output is only printed when the native job has ended.
That''s my problem, my program must continue to run, it never exits, so I never get the output of it except when I manualy close the program.
Isn't there an other way to get the output real time of my program, without it to wait for the end of the program?
Thanks

my case, the native program is written in C++ and
This code works perfectly fine for a native program
that does his job and then exit. I guess the the
output is only printed when the native job has
ended.Although I 'don't do C' :), my guess is that your native app should close the output device it's using (and that the Java app is using for it's inputstream) and re-open it again.
It shouldn't be needed to close your native application for this, only close the output device.
I think :)
Anne.

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Message was edited by:
Rammohan Nagam
Message was edited by:
Rammohan Nagam

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Message was edited by:
sanrosh_95

Try reposting that with tags (replace the {'s with ['s).
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I remember thinking "Remember that there's a trap in the naming of the methods..." :o)
I'll try to remember as well "...and it is not what you thought!" :op
The program that I'm calling does not have a GUI and it expects the pressing of the ESC-button on the keyboard.
The program does not respond to the keyboard if the window is not active.That probably means the program does not read 'ESC' on its stdin, but merely listens for a "graphical" event indicating "key ESC pressed".
In this case, as per camickr correction, Robot might generate this native event, but the app (or its launching window) will not receive it if it doesn't have the focus.
One not-so-nice way could be to display the app window or terminal (using xterm -e /path/to/real/app on Unices, start \path\to\real\app on Windows, with various options to handle titles and pathes), and the user would have to click on this window and then type the 'ESC' key.
A few words on the drawback:
- how to automate giving the focus to the app terminal, so that the user doesn't have to click on it?
Of course it depends on your application: is it general purpose app running on general purpose desktops, or worse portable across different OS? Then you're most probably stuck.
I"ve had to work on constrained environments where our app were almost the only one to run, and managed the whole screen. When launching an external app from the main Java launcher, for some dedicated task, the main Java app would simply hide or iconify itself, and the forked app was the only active one.
- how to automate typing the ESC key?
See camickr reply about Robot being able to send a native event to the current focused app.
- how to control (more or less) how the app terminal displays?
Give up any hope of portability. But there are system-specific ways to fix a terminal's look (in the sense of "windowing-system-specific", two window managers on Linux will support different options).
- how to pipe the launched app output to the Java window?
First, that may not be necessary once you and the user have accepted that the native console will indeed show up. If you still want the app output, for display of to parse it from the Java launcher, then again look around system-specific options. e.g.:
{code}xterm -l -lc <filename> -e /path/to/app{code}
Edited by: jduprez on Jul 8, 2009 9:08 AM - fixed typo

How to read system eventlog using java program in windows?

How to read system eventlog using java program in windows?
is there any java class available to do this ? or any one having sample code for this?
Your friend Zoe

Hi,
There is no java class for reading event log in windows, so we can do one thing we can use windows system 32 VBS script to read the system log .
The output of this command can be read using java program....
we can use java exec for executing this system32 vbs script.
use the below program and pass the command "eventquery"
plz refer cscript,wscript
import java.io.*;
public class CmdExec {
public static void main(String argv[]) {
try {
String line;
Process p = Runtime.getRuntime().exec("Command");
BufferedReader input =
new BufferedReader
(new InputStreamReader(p.getInputStream()));
while ((line = input.readLine()) != null) {
System.out.println(line);
input.close();
catch (Exception err) {
err.printStackTrace();
This sample program will list all the system log information....
Zoe

How to read list output into itab? - URGENT

hai experts,
how to read current report output for further validation i need all data which is showing in output.
my req is,
to read list output all data put into itab.
reward avail for useful answer....
regards,
jai.m

Hi kumar,
you said your using second one.
it's good. then use the below part.but check the syntax because it is there in other programs what i have already phased.
INCLUDE <%_list>.
DATA %_LIST TYPE SLIST_LIST_TAB ." WITH HEADER LINE.
DATA %_LIST_WA TYPE SLIST_LISTLINE.
DATA: BEGIN OF data_tab OCCURS 0,
line(255),
END OF data_tab.
& Then use:-
LOOP AT %_list into %_list_wa.
data_tab-line = %_list-line.
data_tab-line = %_list_wa-line.
APPEND data_tab.
Clear data_tab.
Clear %_list_wa.
ENDLOOP.
kindly reward me if it's ok

How can I run external console program, printing output to JTextPane?

How can I run external console program, printing output to JTextPane?
I have a console app. written in C++ and I would like to run in it from java swing app. and I would like to see its output in a JTextPane.

I have used this article
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
to successfully pipe output from jboss batch files to a JTextPane.

How to read .xml file from embedded .swf(flash output) in captivate

I have been trying to read .xml file from the .swf (Flash output) that is embedded within the captivate file but no luck yet . Please if anyone got any clue on how get this thing done using Action script 3.0 then let me know. I am using Adobe Captivate 5.5 at present and Flash CS 5.5.
I am well aware about how to read .xml file through action script 3.0 in flash but when insert the same flash in captivate and publish nothing comes in captivate output. I would higly appreciate if anyone could help me out with that.
Here is is graphical demonstration of my query :
Message was edited by: captainmkv

Hi Captainmkv,
Does the information in this post cover what you're trying to do: http://forums.adobe.com/message/5081928#5081928
Tristan,

How to read output of native program

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