is the embedded Java declaration statement, which gets inserted at the Servlet class level.
Important: declaring variables via this element is not thread-safe, because this variable ends up in the generated Servlet as an instance variable, not within the body of the _jspservice() method. Ensure their access is either read-only or synchronized.
is the embedded Java expression, which gets evaluated by the service method.
are the embedded Java statements, which get executed as part of the service method.
(Note: Not recommended to use Scriptlet elements because they donâ€™t provide reusability and maintainability. Use custom tags (like JSTL, JSF tags, etc) or beans instead).
A JSP element that provides information for execution phase.
A JSP element that provides global information for the translation phase.