Problem with Runtime.exec()

[nhabibi]

Hi all,

I want to get a list of a directory with dir command (windows Vista). I write:

Runtime.getRuntime.exec("cmd.exe /C dir " + MyPath);

but the command can't find the specified path for dir. My question is that how we can pass an argument for command line's programs like dir, copy,etc?

:confused:

[Eranga]

Should be

getRuntime()

[nhabibi]

Yes, actually it is:
Runtime.getRuntime().exec().
I made a mistake in posting.
What is the problem?

[masijade]

Why don't you just use File?

But, did you use the full path? Or did you use a partial path, in which case, your "current path" is probably not what you thought it was.

[nhabibi]

I ue the full path. I know that I can do it with File, but I want to know how to do with exec().

[masijade]

Well, it might help to show the actual code, but probably better is this:

When Runtime.exec() won't - Java World

[Eranga]

Did you get any Exceptions here?

[nhabibi]

no exception

[Eranga]

Did you check the output is correct, trying to write into a stream? And also the best way is, use a command string array. Check overloaded functions of exec().

[Norm]

What happens if you leave off the cmd.exe /C and start the comand with dir?
Have you tried the exec() with other commands and gotten them to work?

[nhabibi]

It solved. If a program generates output or error, you should get the stream and write it immediately.

I read the javaworld article, thanks Masijade :)

[scotter59]

Hi all,

I want to get a list of a directory with dir command (windows Vista). I write:

Runtime.getRuntime.exec("cmd.exe /C dir " + MyPath);

but the command can't find the specified path for dir. My question is that how we can pass an argument for command line's programs like dir, copy,etc?

:confused:

Might need to have something like this ("cmd.exe /C dir """ + MyPath + """") had a similar issue with vbscript today, damn """" and spaces. This may not be exact but might help with your problem.