JAVA GUI Interview Questions and Answers
The Java Foundation Classes (JFC) are a set of Java class libraries provided as part of Java 2 Platform, Standard Edition (J2SE) to support building graphics user interface (GUI) and graphics functionality for client applications that will run on popular platforms such as Microsoft Windows, Linux, and Mac OSX
Swing Interviews are getting tough these days as the technology grows faster. To get through the Swing interview one needs to update him/herself in a regular manner. Having said that, just before the interview, it is very important to have a quick glance of the reputed Swing questions and answers to make yourself comfortable during the interview process. This is where DoAnswers.com helps you in renewing yourself on Swing and various other technologies interview preparation.
41. What are the various Struts tag libraries?
Struts is very rich framework and it provides very good and user friendly way to develop web application forms. Struts provide many tag libraries to ease the development of web applications. These tag libraries are: * Bean tag library - Tags for accessing JavaBeans and their properties. * HTML tag library - Tags to output standard HTML, including forms, text boxes, checkboxes, radio buttons etc.. * Logic tag library - Tags for generating conditional output, iteration capabilities and flow management * Tiles or Template tag library - For the application using tiles * Nested tag library - For using the nested beans in the application
42. What class is the top of the AWT event hierarchy?
The java.awt.AWTEvent class is the highest-level class in the AWT event-class hierarchy
43. What do you understand by DispatchAction?
DispatchAction is an action that comes with Struts 1.1 or later, that lets you combine Struts actions into one class, each with their own method. The org.apache.struts.action.DispatchAction class allows multiple operation to mapped to the different functions in the same Action class. For example: A package might include separate RegCreate, RegSave, and RegDelete Actions, which just perform different operations on the same RegBean object. Since all of these operations are usually handled by the same JSP page, it would be handy to also have them handled by the same Struts Action. A very simple way to do this is to have the submit button modify a field in the form which indicates which operation to perform. SAVE SAVE AS NEW DELETE Then, in the Action you can setup different methods to handle the different operations, and branch to one or the other depending on which value is passed in the dispatch field. String dispatch = myForm.getDispatch(); if ("create".equals(dispatch)) { ... if ("save".equals(dispatch)) { ... The Struts Dispatch Action [org.apache.struts.actions] is designed to do exactly the same thing, but without messy branching logic. The base perform method will check a dispatch field for you, and invoke the indicated method. The only catch is that the dispatch methods must use the same signature as perform. This is a very modest requirement, since in practice you usually end up doing that anyway. To convert an Action that was switching on a dispatch field to a DispatchAction, you simply need to create methods like this public ActionForward create( ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { ... public ActionForward save( ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { ... Cool. But do you have to use a property named dispatch? No, you don't. The only other step is to specify the name of of the dispatch property as the "parameter" property of the action-mapping. So a mapping for our example might look like this: If you wanted to use the property "o" instead, as in o=create, you would change the mapping to Again, very cool. But why use a JavaScript button in the first place? Why not use several buttons named "dispatch" and use a different value for each? You can, but the value of the button is also its label. This means if the page designers want to label the button something different, they have to coordinate the Action programmer. Localization becomes virtually impossible. (Source: http://husted.com/struts/tips/002.html).
44. What does a JFC-based application user interface look like?
Applications built using JFC are not locked in to a specific look and feel. Using JFC, developers can create apps that either have a native platform look and feel or use the Java look and feel -- or they can create their own custom look and feel. The power lies in the hands of developers -- they can develop their products using the look and feel that is most appropriate for their users.
45. What does JFC cost?
Nothing! Sun does not charge for the use or distribution of JFC.
46. What interface is extended by AWT event listeners?
All AWT event listeners extend the java.util.EventListener interface.
47. What is a layout manager?
A layout manager is an object that is used to organize components in a container
48. What is 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.
49. What is ActionServlet?
The class org.apache.struts.action.ActionServlet is the called the ActionServlet. In the the Jakarta Struts Framework this class plays the role of controller. All the requests to the server goes through the controller. Controller is responsible for handling all the requests.
50. What is clipping?
Clipping is the process of confining paint operations to a limited area or shape
-
Databases Questions and Answers
- DB2 Interview Questions and Answers
- IMS Interview Questions and Answers
- MYSQL Interview Questions and Answers
- Oracle Interview Questions and Answers
- PL/SQL Interview Questions And Answers
- Quel Interview Questions and Answers
- SQL Interview Questions and Answers
-
.NET Interview Questions and Answers
- ASP Interview Questions and Answers
- C# Interview Questions and Answers
- Visual Basic Interview Questions and Answers
-
J2EE Interview Questions and Answers
- Enterprise Java Beans (EJB) Interview Questions And Answers
- Hibernate Interview Questions And Answers
- Jave Messaging Service (JMS) Interview Questions And Answers
- Jave Server Faces (JSF) Interview Questions And Answers
- Java Server Pages (JSP) Interview Questions And Answers
- Servlets Interview Questions And Answers
- Spring Framework Interview Questions And Answers
- Struts Framework Interview Questions And Answers
-
JAVA Interview Questions and Answers
- Core Java Interview Questions and Answers
- Java Platform, Micro Edition (Java ME) Interview Questions And Answers
- JAVA GUI Interview Questions and Answers
- Java Performance Tuning Interview Questions And Answers
- JUnit Interview Questions And Answers
- Remote Method Invocation (RMI) Interview Questions And Answers
- Unified Modeling Language (UML) Interview Questions And Answers
-
Java Application Server Interview Questions And Answers
- Tomcat Application Server Interview Questions And Answers
- WebLogic Application Server Interview Questions And Answers
-
Mainframe Interview Questions and Answers
- CICS Interview Questions and Answers
- COBOL Interview Questions and Answers
- IMS Interview Questions and Answers
- JCL Interview Questions and Answers
- REXX Interview Questions and Answers
- TELON Interview Questions and Answers
- VSAM Interview Questions and Answers
-
Object Oriented Language Questions and Answers
- C Interview Questions and Answers
- C++ Interview Questions and Answers
- Eiffel Interview Questions and Answers
- J2EE Interview Questions and Answers
- JAVA Interview Questions and Answers
- Sather Interview Questions and Answers
- Small talk Interview Questions and Answers
-
Operation Systems Interview Questions and Answers
- MS DOS Interview Questions and Answers
- Unix OS Interview Questions and Answers
- Windows Interview Questions and Answers
-
Scripting languages Interview Questions and Answers
- Java Script Interview Questions and Answers
- Practical Extraction and Reporting Language Interview Questions and Answers
- PHP Interview Questions and Answers
- VBScript Interview Questions and Answers
-
UserInterfaces Questions and Answers
- Foxit Interview Questions and Answers
- Glade Interview Questions and Answers
- Tweak Interview Questions and Answers
-
WEB Technologies Questions and Answers
- AJAX Interview Questions and Answers
- HTML Interview Questions and Answers
- WML Interview Questions and Answers
- XML Interview Questions and Answers
-
Interview Tips And Some Common Questions
- Behavioral Interview Questions And Answers