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

Equation tool, i need help i hav done the gui part of my project and some s...

i need help i hav done the gui part of my project and some simple symbols but to display some complex symbols like integration and all but it shud be clear with lower and upper lim

Write responsibility of developer-executive -support team, Write responsibi...

Write responsibilities of the followings 1. Developer a) Module level design. b) Coding c) Unit testing 2. Executive Team a) Responsible for the day to day operations. b) A

Give an example of class or static members, Give an example of Class or sta...

Give an example of Class or static Members? Below is a Car class along with such a speedLimit field and getSpeedLimit() method. public class Car { private String licensePla

#title.using linked list, Write a program that takes as input a sequence of...

Write a program that takes as input a sequence of transactions of the form

Android app for evaluating of distance, Android app for evaluating of dista...

Android app for evaluating of distance Project Description: The request is to prepare an app for Android. The application needs to run on tablet (7 "or larger) and the layout

Prepare a java program to read .gpx files, Prepare a Java program to read ....

Prepare a Java program to read .GPX files Project Description: Prepare a Java program (GPX_Tracks_to_Text.Java) for Windows to: - Read every .GPX file in a provide drive a

Draw a use case diagram in uml, Extend the given drawing program (the versi...

Extend the given drawing program (the version that allows undo and redo) as follows: a) Allow the user to select font and font size; user should also be able to boldface, underl

Describe what is meant by a constructor in java, Question: (a) Describe...

Question: (a) Describe what is meant by a ‘constructor' in Java. Use a simple example to illustrate your answer. (b) Differentiate between a class method and an instance me

Solve neural network questions, Solve Neural Network Questions Project D...

Solve Neural Network Questions Project Description: You must know  Binary Chop and Kohonen Network, Backpropagation Algorithm. Implementation is required. Can using existi

What are commonsense guidelines to prevent viruses, What are Commonsense Gu...

What are Commonsense Guidelines to prevent viruses? Discuss about Antivirus as well. Commonsense Guidelines to avoid viruses are as follows: 1. Do not open attachment of unwant

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