What is an “ActionForm”?

Struts Questions and Answers

(Continued from previous question...)

84. What is an “ActionForm”?

An “ActionForm” is a JavaBean that extends org.apache.struts.action.ActionForm.
ActionForm maintains the session state for web application and the “ActionForm” object is automatically populated on the server side with data entered from a form on the client side.

(Continued on next question...)

Other Interview Questions

• What is Struts?
• How is the MVC design pattern used in Struts framework?
• Who makes the Struts?
• Why it called Struts?
• Do we need to pay the Struts if being used in commercial purpose?
• What are the core classes of Struts?
• What is the design role played by Struts?
• How Struts control data flow?
• What configuration files are used in Struts?
• What helpers in the form of JSP pages are provided in Struts framework?
• Is Struts efficient?
• How you will enable front-end validation based on the xml in validation.xml?
• What is ActionServlet?
• How you will make available any Message Resources Definitions file to the Struts Framework Environment?
• What is Action Class?
• Write code of any Action Class?
• What is ActionForm?
• What is Struts Validator Framework?
• Give the Details of XML files used in Validator Framework?
• How you will display validation fail errors on jsp page?
• Why do we need Struts?
• How does Struts work?
• Is Struts compatible with other Java technologies?
• Who wrote Struts?
• Why is it called Struts?
• Do I have to credit Struts on my own website?
• Where can I get a copy of Struts?
• How do I install Struts?
• When do I need "struts.jar" on my classpath?
• Does Struts include its own unit tests?
• If the framework doesn't do what I want, can I request that a feature be added?
• Where can I get help with Struts?
• What's the difference between Struts and Turbine? What's the difference between Struts and Expresso?
• Why aren't the Struts tags maintained as part of the Jakarta Taglibs project?
• Are the Struts tags XHTML compliant?
• Will the Struts tags support other markup languages such as WML
• What about JSTL and JavaServer Faces?
• Is there a particularly good IDE to use with Struts
• Why was reload removed from Struts (since 1.1)?
• What is a modular application? What does module-relative mean?
• Why are some of the class and element names counter-intuitive?
• Why is ActionForm a base class rather than an interface?
• Do ActionForms have to be true JavaBeans?
• Can I use multiple HTML form elements with the same name?
• Can I use multiple HTML form elements with the same name?
• Why doesn't the focus feature on the <html:form> tag work in every circumstance?
• Why are my checkboxes not being set from ON to OFF?
• Can I use JavaScript to submit a form?
• How do I use JavaScript to ...
• Can't I just create some of my JavaBeans in the JSP using a scriptlet?
• Can I use other beans or hashmaps with ActionForms?
• Why do the Struts tags provide for so little formatting?
• Why does the <html:link> tag URL-encode javascript and mailto links?
• How can I scroll through list of pages like the search results in google?
• Why does the option tag render selected=selected instead of just selected?
• Do I have to use JSPs with my application?
• Do ActionForms have to be true JavaBeans?
• Do I have to have a separate ActionForm bean for every HTML form?
• How can I prepopulate a form?
• Can I have an Action without a form?
• Can you give me a simple example of using the requiredif Validator rule?
• When is the best time to validate input?
• How can I avoid validating a form before data is entered?
• How can I create a wizard workflow?
• How can I 'chain' Actions?
• Struts GenericDataSource Just a general question
• Dynamic pages using struts Is it possible to create the elements of a page(jsp) dynamically based on the results of a data base query, when using struts framework?
• What's the best way to deal with migrating a large application from Struts to JSF? Is there any tool support that can help?
• Declarative Exception Handling
• Can you compare the advantages and disadvantages of JSF vs. Struts ?
• Both JSF and Struts will continue to exist for a while ?
• Multiple Sub-applications
• DynaBean and BeanUtils
• Validator
• Default Sub-application
• Direct Requests to JSPs
• ActionServlet Configurations
• Action.execute() and Action.getResources()
• Library Dependency
• Resources under WEB-INF
• What is the Jakarta Struts Framework?
• What is an ActionServlet?
• How can one make any “Message Resources” definitions file available to the “Struts Framework” environment?
• What is an “Action Class”?
• Write code of any Action Class?
• What is an “ActionForm”?
• What is Struts Validator Framework?
• Describe the details of XML files used in the “Validator Framework”?
• How would you display “validation fail” errors on a JSP page?
• How can one enable front-end validation based on the xml in validation.xml?