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

Develop a geonetwork template, Develop a GeoNetwork Template Project Des...

Develop a GeoNetwork Template Project Description: Want a personalized GeoNetwork Template with the consideration of the logo included to this proposal and its colors. The ba

Explain the basic applet life cycle, Explain the Basic Applet Life Cycle ? ...

Explain the Basic Applet Life Cycle ? 1. The browser reads the HTML page and seraches any tags. 2. The browser parses the tag to search the CODE and possibly CODEBASE att

What are trojan horses, What are Trojan Horses? Trojan Horses are unlik...

What are Trojan Horses? Trojan Horses are unlike viruses usually they are stand-alone programs. The look such as what they are not. They appear to be something harmless and int

Search on column demonstration in semantic vector, Search on column demonst...

Search on column demonstration in Semantic Vector Project Description: I am preparing a research on Semantic Vectors. But I am not able to check out in a vector representa

What is dynaactionform, A specialized subclass of ActionForm that permits t...

A specialized subclass of ActionForm that permits the creation of form beans with dynamic sets of properties (configured in configuration file), without requiring the developer to

Describe methods of basic applet life cycle, Describe methods of Basic Appl...

Describe methods of Basic Applet Life Cycle ? All applets have the subsequent four methods: public void init(); public void start(); public void stop(); public void destroy();

Lesson 20 project How far to the Line, I do not understand how to do this? ...

I do not understand how to do this? can someone help me?

Simple functional website without any graphic work, Want simple functional ...

Want simple functional website without any graphic work, like panel Project Description: I want a very simple look website .It should be like a panel. Few tab, contact form,

I want selenium based test automation for java, I want Selenium Based Test ...

I want Selenium Based Test Automation for Java Based Web Application Project Description: I want some test cases to be automated to login to UI which is Java based web applic

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