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

Explain difference between method overriding and overloading, What is the d...

What is the difference between method overriding and overloading? Overriding is a method with the same name and arguments as in a parent, whereas overloading is the same met

Implement the list calss, Your next task is to implement the MovieList clas...

Your next task is to implement the MovieList class that manages the details for a list of DVD Movies read from the specified data file. The constructor will include a parameter tha

Explain the reading documentation for a class in the class, Explain the Rea...

Explain the Reading documentation for a class in the class library For instance, let's suppose you need to use the URL class in the java.net package. Through reading the docume

Describe the class or static members, Describe the Class or static Members ...

Describe the Class or static Members ? A method or a field in a Java program could be declared static. That means the member belongs to the class rather than to an individual

What is resuscitation trolley explain their features, What is Resuscitation...

What is Resuscitation Trolley explain their features? A proper resuscitation kit is mandatory for the ICU. In addition to trolleys that can be moved around the ICU there should

Java is object oriented programme language, Java is Object oriented program...

Java is Object oriented programme language Java is comprehensively OOP language with robust memory system Memory errors largely disappear due to safe pointers and garbage c

Windows registry, need a java program that can read and display the values ...

need a java program that can read and display the values from a windows registry

What is the purpose of garbage collection in java, What is the purpose of g...

What is the purpose of garbage collection in Java, and when is it used? The purpose of garbage collection is to identify and discard objects that are no longer required by a pr

I want java web developer, Project Description: A web developer is requi...

Project Description: A web developer is required to finish a webcam site with basic account management and voting functionality. The website can make use of a third party fla

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