String libjars = set.toString();
libjars = libjars.replaceAll("jar" + File.pathSeparator, "jar" + File.pathSeparator + libDir);
libjars = libDir + libjars;
final Commandline cmdLine = new Commandline();
cmdLine.addArguments(args);
Commandline.Argument argClasspath = cmdLine.createArgument();
argClasspath.setLine("-classpath " + "conf" + File.pathSeparator + libjars);
Commandline.Argument argStart = cmdLine.createArgument();
argStart.setLine("-jar lib/start.jar");