How to Run a batch file???

Hi All!
I am trying to run a batch file �Mine.bat� from Java file �Helpme.java� I have written in batch file
D:\
cd javadoc
javac Myprog.java
java Myprog
But when I try to run it (�Mine.bat�) from �Helpme.java� by using,

String str[]={�Mine.bat�};
Process proc;
try{
proc=Runtime.getRuntime().exec("str");
}catch(Exception e){
System.out.println("Exception is raised");
}
The out put results in only the change of directory that is from c:\ it goes to D:\ and program stops instead of running whole Mine.bat, plz tell me what to do? My goal is to compile another java file that is �Myprog.java� from �Helpme.java�.
Files contain in the following directories.
C:\Mine.bat
C:\ Helpme.java
D:\javadoc\Myprog.java
I am using Windows me
I will wait for reply.
bye

I don't know how it'll help you, but when you run bat file
from other bat you should use "call filename.bat" instead of
"filename.bat".
Alex.

no I want to run a batch file from java file

can u plz send me the coding how to run a batch file from java file it is not working properly only directory is changed

Does the bat file work if you run it by hand from the d:\javadoc directory?

The batch file would not have worked properly because of the reason that 'd:\'. It should be actually 'd:'. Then, the directory change will happen and rest will follow.

My batch file is at C:\ and My java file "Helpme.java" is also at c:\ I am compling the file" Helpme.java" from c:\ but "Helpme.java" file is not running my batch file"Mine.bat" the result is only the change of directory that is D:\ when I run it from hand that is by using mouse then it works ok.
But not from "Helpme.java"'s codding.
I am making a compiler and I am very desperate to solve this problem.
thank you for ur consideration,

Originally posted by Mo Ibrahim:
The batch file would not have worked properly because of the reason that 'd:\'. It should be actually 'd:'. Then, the directory change will happen and rest will follow.

No Ibrahim its also not working now the output is only a cursor blinking and prgram is stoped just like waitting for an IO operation.

Hi
plz help me!!
I am waitting for any solution!!

Is your path setting the same when you run manually and from the java program?

First of All Thank U Ibrahim for helping me
Path setting are different means My batch file is located at C:\
and I am compling the java file from C:\ and in batch file it is written to compile and run a javafile which is located in D:\javadoc\
Thank u again very much for ur concern about my problem coz I was thinking that I am left alone by the java experts running this services.