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

Differentiate between primitives and objects, Differentiate between Primiti...

Differentiate between Primitives and Objects Everything in Java is an "Object", as every class by default inherits from class "Object", except a few primitive data t

Explain animate gifs, Explain Animate gifs? We can save 16 gif images ...

Explain Animate gifs? We can save 16 gif images of the previous instance in a single file in the form of an animated gif, and then used it in a regular tag to display a movi

Nelson-siegel parametric class of term structures, Since there are only a f...

Since there are only a finite number of bonds available in the market. There will always be "holes" to fill in when defining a yield curve in continuous time. A common approach is

Different messaging paradigms jms supports, What are the different messagin...

What are the different messaging paradigms JMS supports? Ans) Publish and Subscribe i.e. pub/suc and Point to Point i.e. p2p.

Develop a java - jnlp application, Need Java/JNLP Application - GUI and Bac...

Need Java/JNLP Application - GUI and Backend Projects Project Description: I am looking for assistance in making changes to a complex java application. System launches fro

When should a method be static, When should a method be static? • Neith...

When should a method be static? • Neither reads from nor writes to example fields • Independent of the state of the object • Mathematical methods which accept arguments, appl

Forward action and include action, What is the difference among ForwardActi...

What is the difference among ForwardAction and IncludeAction? Ans) The difference is that you require to use the IncludeAction only if the action is going to be contained by ano

I need java coding, I need Java coding Need to develop a website. Requir...

I need Java coding Need to develop a website. Require Java coder's urgently. Skills required: HTML, Graphic Design, Java, PHP, Website Design

Develop a java application, Project Description: Modules of software: ...

Project Description: Modules of software: 1 - Serial RS232 comm port comunication 2 - NanoHTTPD serving some processed pages 3 - System tray application to indicate sta

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