Java Server Pages are, in the most basic sense, Web pages with embedded Java code. The embedded Java code is executed on the server before the page is returned to the browser. If a picture is worth a thousand words, in this case an example is worth a thousand explanations. Listing 14.1 shows a basic Java Server Page.
<HTML> <BODY> <% out.println("<H1>Hello World!</H1>"); %> </BODY> </HTML>
Although you can probably guess what the browser will display when this page runs, Figure 14.1 shows the output from this page.