🚀 go-pugleaf

George wrote:

> I want to capture the standard output of a console program written in C in a
> JTextArea component.  The code I am running is shown below.  The issue I
> have is:  it takes inordinately long for the the first line of    output to
> appear; and when it does all of the ouput (about 20 lines) appears together.
> This is not the case if I run the program from the DOS prompt.  Any ideas
> why the behavior is different when the program is run under control of a
> Java program?
> 
>      cycleProcess = rt.exec(command, null, currentDir);
>         InputStreamReader isr = new
> InputStreamReader(cycleProcess.getInputStream());
>         batchLogReader = new LineNumberReader(isr);
>         outputLine = batchLogReader.readLine();
>         while (outputLine  != null) {
>           outputLine = batchLogReader.readLine();
>           messagesTextArea.setText(messagesTextArea.getText() + "\n" +
> outputLine);
>           messagesTextArea.paintImmediately(messagesTextArea.getBounds());
>         }
> 
> 

Generally streams don't flush to output until their buffers are full. 
If you want to see intermediate results, you should use flush().

-- 

Regards,

Lori Olson [TeamB]

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