When you run the command from your unix shell javac will pick up the class
path from an environment variable set for that shell.
I suspect that you need to explicitly set the classpath either as part of
the command with a "-cp <classpath here>" or use the form of
Runtime.exec(String[],String[]) that lets you set environment variables and
specify the classpath as it is done in your shell.
cheers
> -----Original Message-----
> From: Dinesh Abichandani [SMTP:[EMAIL PROTECTED]
> Sent: 25 March 2003 05:57
> To: [EMAIL PROTECTED]
> Subject: problem exec javac from servlet
>
> hi there
> I am trying to execute javac command from my servlet but it not letting me
> do it . i am using tomcat server. here is the code wht i am trying to
> run:
>
> Process proc1=null;
> Runtime rt1 = Runtime.getRuntime();
> proc1 = rt1.exec(new
> String[]{"javac","/vol1/people/dinesh/jakarta-tomcat-4.0.6/webapps/example
> s/WEB-INF/classes/HelloWorldExample.java"});
> BufferedReader err1 = new BufferedReader(new
> InputStreamReader(proc1.getErrorStream()));
> String line1 = null;
> while ( ( line1 = err1.readLine()) != null)
> out.println( line1);
> and the error i get is:
>
> /vol1/people/dinesh/jakarta-tomcat-4.0.6/webapps/examples/WEB-INF/classes/
> HelloWorldExample.java:8: package javax.servlet does not exist import
> javax.servlet.*; ^
> /vol1/people/dinesh/jakarta-tomcat-4.0.6/webapps/examples/WEB-INF/classes/
> HelloWorldExample.java:9: package javax.servlet.http does not exist import
> javax.servlet.http.*; ^
> /vol1/people/dinesh/jakarta-tomcat-4.0.6/webapps/examples/WEB-INF/classes/
> HelloWorldExample.java:17: cannot resolve symbol symbol : class
> HttpServlet location: class
> HelloWorldExample public class HelloWorldExample extends HttpServlet { ^
> /vol1/people/dinesh/jakarta-tomcat-4.0.6/webapps/examples/WEB-INF/classes/
> HelloWorldExample.java:20: cannot resolve symbol symbol : class
> HttpServletRequest location: class
> HelloWorldExample public void doGet(HttpServletRequest request, ^
> /vol1/people/dinesh/jakarta-tomcat-4.0.6/webapps/examples/WEB-INF/classes/
> HelloWorldExample.java:21:
> cannot resolve symbol symbol : class HttpServletResponse location: class
> HelloWorldExample HttpServletResponse response) ^
> /vol1/people/dinesh/jakarta-tomcat-4.0.6/webapps/examples/WEB-INF/classes/
> HelloWorldExample.java:22: cannot resolve symbol symbol : class
> ServletException location: class
> HelloWorldExample throws IOException, ServletException ^ 6 errors
>
> if i run this command in my unix shell it works fine but not when i try to
> run this command from servlet. i have a copy of servlet.jar file in lib
> directory of tomcat and a classpath to it is also set in my .login file.
>
> please advice wht need to be done?
>
> thanks
> dinesh
>
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