I want to know user home directory when i run through java applet. I
could not success through System.getProperty("user.home") as it gave me
security exception. Then i tried the following way which simply exec
the commands "echo %HOMEDRIVE%%HOMEPATH%" for windows and for linux
"echo $HOME".  But this also fails as it is giving me the exception
java.io.IOException: CreateProcess: echo %HOMEDRIVE%%HOMEPATH% error=2
and  java.io.IOException: CreateProcess: echo %HOMEDRIVE%%HOMEPATH%
error=2. what these errors mean?
is there any other way of knowing home directory in platform neutral
way?

I tried the following souce code.

import java.applet.* ;
import java.io.*;
public class execOutput extends Applet{
public void init(){
}
public void start(){
String envoutput=readenv();
}
String readenv(){

               String env="echo %HOMEDRIVE%%HOMEPATH%";
                try {
                   String ls_str;
               Process ls_proc = Runtime.getRuntime().exec(env);
                   // get its output (your input) stream
                   DataInputStream ls_in = new DataInputStream(

ls_proc.getInputStream());
                   try {
                       while ((ls_str = ls_in.readLine()) != null) {
                               return ls_str;
                       }
                   } catch (IOException e) {
                               System.out.println("Exception in
environmental output"+e);
                   }
               } catch (IOException e1) {
                               System.out.println("Exception in
environmental output"+e1);

                       env="echo $HOME";
               }
                try {
                   String ls_str;
               Process ls_proc = Runtime.getRuntime().exec(env);
                   // get its output (your input) stream
                   DataInputStream ls_in = new DataInputStream(

ls_proc.getInputStream());
                   try {
                       while ((ls_str = ls_in.readLine()) != null) {
                               return ls_str;
                       }
                   } catch (IOException e) {
                               System.out.println("Exception in
environmental output");
             }
               } catch (IOException e1) {
                               System.out.println("Exception in
environmental output"+e1);
                       env="echo $HOME";

               }
               return "not found";
}
}

thanks
Nagesh