Input redirection in Java

[freephoneid]

Hi,
I've a perl script called process.pl which I use to invoke through unix client as shown below:

$ process < abc.txt

Now, abc.txt contains entries per line which is processed by this perl script.

I want to invoke this process script through Java. I've captured the input which is required for this script in StringBuffer. My question is how do I pass this input which I stored in stringbuffer to this script?

I've tried below command, but it takes only 1st string within my Stringbuffer.

Stringbuffer str; // This contains line by line input which is required for script
.....
Runtime.getRuntime().exec("process " + str);

But the above code executes & parses only 1st line in my stringbuffer. Can any one provide me the code which will take all input from this stringbuffer & pass it to process script??

Please note that I DO NOT want to create a file & then pass it to script.

Thanks in Advance!

[OrangeDog]

Process.getInputStream() and Process.getOutputStream() to communicate with an external process.

[freephoneid]

Can you please provide me the code snipppt to pass stringbuffer to this output or input stream?

Thanks in Advance!

[OrangeDog]

Wrap the stream with a BufferedWriter and write() the contents of the StringBuffer.

[freephoneid]

Hi OrangeDog,
I really appreciate your response however, I'm not expert in Java.

So far, I've below code:

StringBuffer str= new StringBuffer();
str.append("1st line");
str.append("\n");
str.append("2nd line");
 
Process process = Runtime.getRuntime().exec("process " + str);
OutputStream outStream = process.getOutputStream();
 
int exitVal = process.waitFor();
 
if (exitVal == 0) {
     result = true;
} else {
     result = false;
}

How do I write data from stringbuffer to outstream?

Appreciate any help!!

[OrangeDog]

What I said is explained here.
Lesson: Basic I/O (The Java™ Tutorials > Essential Classes)

[Fubarable]

Useful advice in your cross-post here: Java Programming - Input redirection in Java