Scriptlet let developers write java code within jsp file. Though this is not a recommended practice from the code maintenance perspective its widely used in the initial version of jsp applications.
JSP Scriptlet Syntax
<% java code fragment %>
Simple Example (github)
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>ourownjava.com</title> </head> <body> <!-- scriptlet example --> <%out.println("Today is "+new java.util.Date()); %> </body> </html>
JSP Scriptlet sample program
https://github.com/sanjuthomas/jsp-play-ground