How are most Java applications deployed in companies? I believe they are deployed mostly via application servers such as Jboss, IBM Websphere AS, Weblogic, etc. Is this the case across the board? I haven't seen many Java applications, for my Windows desktop anyway. The few Java apps I've seen outside an enterprise IT setting have been delivered via jar files and started via a batch script or something like that.All major Java shops I have seen appear to be deploying applications written in Java via application servers. Are application servers running wars, ears, jsp, etc the de-defacto way Java apps are deployed?