Equivalent of windows' cmd on a mac - How to use java.lang.ProcessBuilder to launch an executable?

Hi,

I have the following code (example adapted from http://uk.mathworks.com/matlabcentral/fileexchange/30478-xfoil-matlab-interface ):

if ispc   
    arg = {'cmd', '/c',sprintf('"%s < %s"',executableName,actionsFileName), '>','nul'};
else
    error('Unix version not yet implemented!')
end
PB=java.lang.ProcessBuilder(arg);
this.Process = PB.start;

Which I'd like to expand slightly to work on a mac. Does anyone know what the equivalent argument ('arg') should be please?

And will the ProcessBuilder work equivalently on a mac?

Thanks for any help!

Tom