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

Programming, .Write a programme to create a webpage that prints the name of...

.Write a programme to create a webpage that prints the name of the STUDENT database in Wide Latin font and set the subtitle with description of the STUDENT to the screen. Set the

Extraction of articles, Extraction of articles The software I'm looking ...

Extraction of articles The software I'm looking to build: 1. Extraction of articles from various sites 2. Format the content to re-post 3. Automate the process Skill

Javascript and coldfusion, Overview Demonstrate your knowledge of JavaS...

Overview Demonstrate your knowledge of JavaScript and ColdFusion by implementing the following functionality: Contact form • The following validation error message shou

Develop wechat program to integrate with sugarcrm, Wechat and SugarCRM P...

Wechat and SugarCRM Project Description: Seeking the partner able to develop wechat program to integrate with SugarCRM. Wechat Official Account able to perform some functi

Benefits of spring framework, Benefits of Spring framework : Spring can...

Benefits of Spring framework : Spring can effectively organize your middle tier objects as given in the diagram above, whether or not you select to use EJB. Applications create

What are checked and unchecked exception, What are Checked and UnChecked Ex...

What are Checked and UnChecked Exception? A checked exception is some subclass of Exception (or Exception itself), excluding class RuntimeException and its subclasses. Making a

Password Generator Software, In this exercise, I want you to generate passw...

In this exercise, I want you to generate password based on random number generator. Develop an application that keeps track of the URL, username and password. I have listed few st

Smugglers decodes , Smugglers are becoming very smart day by day. Now they ...

Smugglers are becoming very smart day by day. Now they have developed a new technique of sending their messages from one smuggler to another. In their new technology, they are send

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