Runtime examples

Question

Hi,
Can someone provide an example on how to execute a command that has several options and arguments with it through the Runtime.exec() command?
I have a command with many options and the syntax of some of them work from the shell env, but not from java (i.e. wrong argument error, ...etc.). Passing the whole command as one string is not working (probably because it is tokenized).
Can someone provide an example on using exec(String [] commandArray) method, for a command and some of its arguments?

Answer 1

This is from my working project:
I have an executable "opt.exe" that takes a parameter, I also want to run it by multiple threads so I have several directories each has a copy of "opt.exe". That brings the need to pass the directory to each thread. I do it in a batch file "opt.bat" that looks like this:
(on Windows machine)
cd %1
opt %2
(on AIX machine)
cd $1
opt $2
This batch file sits right above those directories. I execute it in my java code like this:
Runtime runtime = Runtime.getRuntime();
Process process = null;
try {
if (NT) {
process = runtime.exec( BAT_FILE + " " + directory + " " + param);
else {// AIX machine
process = runtime.exec("ksh " + BAT_FILE + " " + directory + " " + param);
where BAT_FILE contains opt.bat with its full path("C:\\opt.bat"), directory is the working directory that I want the opt.exe to run (full path also), param is the parameter for "opt.exe".
PC