Why is getRuntime.exec() in jsp not working?

Hello, could someone help me on the following problem?
I have a jsp program which runs on tomcat server. In the jsp code, I am supposed to execute something. So I wrote the following codes:
<%
Runtime a = Runtime.getRuntime();
java.lang.Process P = a.exec("javac Sieve.java");
if(P.waitFor()!= 0)
String s="Error while compiling";
else
String s="Commang get excecuted succesfully";
%>
It gives me the "Command exceduted successfully", but I couldn't find the Sieve.class file in the current directory. Also, if I change Sieve.java to S.java which doesn't exist, it gives me "error whild compliling". So I assume the command is executed. But where is the class file it produces? Can anyone help me?

If you click on warnerj's profile, you'll see that he's piled up a pretty impressive number of Dukes. He's helped a lot of people, and the Dukes account is proof of that.
IMO, it's not a matter of warnerj having too high an opinion of himself. He's simply telling posters that their chances of getting his (proven) assistance are diminished by cross-posting, because he considers it rude.
Anyone posting a question here depends on the good will of volunteers for answers. warnerj is giving them a lesson in manners that will maximize their chances of getting a solid answer from someone like him. It's in the OP's self-interest to not cross-post.
You're right - there are a lot of people who read these forums who can offer "advice". Lots of them are also chuckleheads. All advice isn't equal. I see a lot of answers that are misleading at best and just plain wrong at worst. I also see some names that I've started to associate with solid advice. Why alienate the good advisers needlessly by cross-posting?
Sun's rules and the etiquette of behavior acceptable by the community here are two different things. warnerj is providing the OP a lesson in the behavior acceptable to this community. Nothing wrong with that. It's more good education, in my view. - MOD

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Date: Thu, 14 Feb 2013 05:49:55 -0800
From: [email protected]
To: [email protected]
Subject: Why Does Live View In DW Not Work With BC Template?
    Re: Why Does Live View In DW Not Work With BC Template?
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Why is getRuntime.exec() in jsp not working?

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