Why Do We Use Response?

Why do we use response.set content type in Servlet?

While there are also other technologies to serve http content with Java, Servlets and the technologies based on them used to be the only choice. Even now t are the most popular technology behind most of the Java web frameworks. Servlets give you easy access to http Requests and Responses. From there you can build your empire. Now, there are other things that can go on top of them to make your life easier, like a JSP (Java Server Pages) maybe. But still t stay at the base of the stack. It used to be that each request would be allocated a Thread by the servlet, and that can be problematic if you have to many requests but now t have aync support. So there you go. This the use of Servlets.