What Happens when the index.jsp Page is Requested by the Client, if this page included instance variable and included in another jsp page. .

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A JSP Page, Include.jsp, has a Instance Variable “int a”, now this Page is Statically Included in Another JSP Page, index.jsp, which has a Instance Variable “int a” Declared. What Happens when the index.jsp Page is Requested by the Client.

Compilation error, as two variables with same name can’t be declared. This happens because, when a page is included statically, entire code of included page becomes part of the new page. at this time there are two declarations of variable ‘a’. Hence compilation error.

In JavaServer Pages (JSP), when a page is statically included using the <%@ include %> directive, the content of the included page is inserted into the calling page during the translation phase. This means that the content of the included page becomes part of the calling page before the servlet is generated and compiled.

In your scenario, if both include.jsp and index.jsp have instance variables with the same name “int a”, and include.jsp is statically included in index.jsp, the following behavior will occur:

  1. During the translation phase, the content of include.jsp is inserted into index.jsp.
  2. Since both pages have an instance variable with the same name “int a,” it would result in a compilation error. The Java compiler will detect that there are two conflicting variable declarations within the same scope.

To avoid such conflicts, it’s recommended to use unique variable names in each JSP page, especially when including pages with common variable names. If you need to share data between the included and including pages, consider using request attributes, session attributes, or other mechanisms provided by the JSP/Servlet framework.