Explain the importance of abstract classes in java, JAVA Programming

Assignment Help:

Question:

(a) Explain the importance of abstract classes in Java with an appropriate example.

(b) Explain what is meant by an interface in Java? Use a simple example to illustrate your answer.

(c) A GUI may contain text-fields, buttons, and other labels. A button usually triggers an event on the GUI. Explain the different processes in registering an event and handling the action performed by the button in Java.

(d) Write the code for a GUI which will allow a user to enter two numbers and then compute the product by clicking on a button. The result can be displayed in a text-field or as a label on the GUI.


Related Discussions:- Explain the importance of abstract classes in java

What is a jsp and what is it used for?, Java Server Pages (JSP) is a platfo...

Java Server Pages (JSP) is a platform independent presentation layer technology that comes with SUN s J2EE platform. JSPs are normal HTML pages with Java code pieces embedded in th

What can an applet do, What Can an Applet Do? An applet can: • Draw ...

What Can an Applet Do? An applet can: • Draw pictures on a web page • Create a new window and draw in it. • Play sounds. • Receive input from the user by the keyboard or

Area under curve , what will be the logic? in C program #include ...

what will be the logic? in C program #include float start_point, /* GLOBAL VARIABLES */ end_point, total_area; int numtraps; m

Performs simple editsusing html and javascript, You are to write two versio...

You are to write two versions of this assignment. One using HTML and VBScript and one using HTML and Javascript. In both, you are to create an HTML webpage that: performs simple

I want java a web technologies expertise, I want Java a Web Technologies ex...

I want Java a Web Technologies expertise Project Description: Good Java knowledge about 4-5 years to develop online enterprise tool. Seeking someone who is interested to w

Pogram must work on all realms and all ladders, Project Description: The...

Project Description: The program must work on all realms, all ladders, all cores (4x realms,2x ladders,2x cores) The program must be unpatchable and undetectable If patche

J2ee java website rebuild, J2EE Java Website rebuild Project Description...

J2EE Java Website rebuild Project Description: We are seeking an experienced developer to re-build a Java/J2EE based Website. We are in requirement to reconstruct our website

Aspect oriented programming (aop), Aspect-Oriented  Programming  (AOP)  rep...

Aspect-Oriented  Programming  (AOP)  represents  OOP  (Object  Oriented  Programming)  by  giving  the developer to dynamically change the static OO model to make a system that can

Benefits of aop (aspect oriented programming), Benefits of AOP (Aspect Orie...

Benefits of AOP (Aspect Oriented programming) OOP can give the system level code like transaction management, logging, security etc to scatter throughout the business logic. A

Support for web and enterprise web applications, Support for Web and Enterp...

Support for Web and Enterprise Web Applications Java offers an extensive support for the development of web and enterprise applications Servlets, JSP, Applets, RMI, JDBC, EJBs

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd