开发Web服务时J2EE和C＃/ .Net之间的主要区别

Having been primarily a .NET guy up until starting a new job recently; I've only done Web-Service development and consumption in C#/.Net. However I'm embarking on the journey to learn the ins and outs of doing it on the J2EE platform, and I'm curious what the major differences are in this specific type of development.Having been primarily a .NET guy up until start