hey,
in my code i'm using Runtime.getRunt ime().exec() in order to run a .bat file that calls another java program (they communicate with each other using RMI).
when i call:
Process process = Runtime.getRunt ime().exec("cmd /c start C:\\MyFolder\\J avaApp.bat");
the seperate process runs perfectly, but when i add a space to the path:
Process process = Runtime.getRunt ime().exec("cmd /c start \"C:\\My Folder\\JavaApp .bat\"");
then the java.exe refuses to load and all i get is an empty cmd with only "C:\"...
i also tried running this line with a ProcessBuilder, but that didn't work as well.
the .bat file has to be under C:\Program Files, so moving it under a folder without a space in its path is not an option.
does anyone know how can i pass through this problem?
thnx.
3  6988 
The "C:\\MyFolder\\ JavaApp.bat" is one of the arguments of the command "cmd", so if you put a space there inside the name it is parsed as 2 arguments instead of 1. I am not 100% sure but in this case if I remember right you can use method "Process exec(String[] cmdarray)" of class Runtime, and not "Process exec(String command)"! Just put the command and the arguments all as separate strings into a String array and pass that.
i tried this method already and it didn't work.
notice i wrote \"C:\\My Folder\\JavaApp .bat\" which means it's supposed to be read by java as one argument.
by the way if i have a .bat file that contains:
"start /b notpad
start /b calc
start /b java -cp args..."
and i run it like this:
Process process = Runtime.getRunt ime().exec("\"C :\\My Folder\\JavaApp .bat\"");
then the notpad and calc run (so it means that the .bat is being launched) but the java doesn't...
So if the .bat is being launched, which you can verify by the calculator pop-up, then you have solved your Java problem with Runtime.exec().
Now you need to solve a second problem, ms-dos related: how to start a java program from a batch file.
Can you please list full command instead of only ellipis (...) and "args", I mean, the real command contained inside your *.bat file instead of an informative "java -cp args...".
Did you already try this line exactly from the command line directly?
if yes, have you used environment variables before that, which are not set if the *.bat is invoked from your Java application? I mean something like CLASSPATH or PATH?
If yes, then set them inside your *.bat file or pass them along with the Runtime.exec() method.
By the way,
starting a cmd inside a cmd, that means a second shell (from your command)inside a first shell (from Java), which you tried in the first version of your posting, is unnecessary and a bad idea. I remember a little that you must use option K, that means "cmd /K ..." to pass arguments to the second cmd.
Also I remember some differences between "command" and "cmd". Just try "command" to see if they matter.
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