Если вам нужно смонтировать том afp-тома, код выглядит так:
Process p1 = Runtime.getRuntime().exec("/bin/mkdir /Volumes/<mountName>");
p1.waitFor();
Process p2 = Runtime.getRuntime().exec(new String[] {"/sbin/mount_afp","-i","afp://<user>:<passwd>@url.of.serv.er/mountPath/","/Volumes/<mountName>/"});
p2.waitFor();
Если это smb-mount, то код выглядит так:
Process p3 = Runtime.getRuntime().exec("/bin/mkdir /Volumes/<mountName>");
p3.waitFor();
Process p4 = Runtime.getRuntime().exec(new String[] {"/sbin/mount","-t","smbfs","//<user>:<passwd>@url.of.serv.er/mountPath/","/Volumes/<mountName>/"});
p4.waitFor();