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Why this is not working ????

raghavender rao
Ranch Hand

Joined: Jul 20, 2001
Posts: 45
hi ther,,,

when i try to run n compile this prg in browser it says Internal Server Error 500 java.lang.ClassNotFoundException: Unable to find class
if i comment
FilePermission fp = new FilePermission("/test/test.txt","delete");
java.lang.NoSuchMethodError: method
getCanonicalFile()Ljava/io/File; not found

can anyone solve this problem ...
i have tested this code in Windows-2000 n Solaris...the webserver which i am using is JavaWebServer2.0....
(this code is perfectly working on console)
import javax.servlet.*;
import javax.servlet.http.*;
public class DemoTest extends HttpServlet {

public void service(HttpServletRequest req,HttpServletResponse res) {

try {

PrintWriter out = res.getWriter();

FilePermission fp = new FilePermission("/test/test.txt","delete");

File f = new File("/test/test.txt");

f = f.getCanonicalFile();


out.println("File Deleted");




}catch(Exception e){






Rao<BR>Sun Certified Programmer for the Java��� 2 Platform
David O'Meara

Joined: Mar 06, 2001
Posts: 13459

This is only a guess at the moment, but File.getCanonicalFile() and the FilePermissions class have both only existsed since 1.2
It might be that you are compiling them with a post-1.2 JDK but then attempting to run with a pre-1.2
Could that be it? What version of the JDK deos the JavaWebServer use?
raghavender rao
Ranch Hand

Joined: Jul 20, 2001
Posts: 45
no sir,

the version of JDK is 1.2..... n i dont have any other versions installed .......
It is sorta covered in the JavaRanch Style Guide.
subject: Why this is not working ????
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