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

Android apk for 3g dongles support, ANDROID APK for 3G dongles support P...

ANDROID APK for 3G dongles support Project Description: We want someone who will modify this Android app or code a similar one. The App function is to let Android tablet P

What is the basic difference between threads and processes? , A process is ...

A process is an execution of a code but a thread is a single execution sequence within the process. A process may contain multiple threads. A thread is sometimes named a lightweigh

La food, The fancy new French restaurant La Food is very popular for its au...

The fancy new French restaurant La Food is very popular for its authentic cuisine and high prices. This restaurant does not take reservations. To help improve the efficiency of the

Publish subscribe model and p2p model, What is the basic difference among P...

What is the basic difference among Publish Subscribe model and P2P model? Ans) Publish Subscribe model is typically used in one-to-many situation. It is unreliable but very quic

What is a java package and how is it used, A Java package is a naming conte...

A Java package is a naming context for classes and interfaces. A package is used to make a separate name space for groups of classes and interfaces. Packages are also used to arran

Basic difference between equals and identity method, The == gives true, i...

The == gives true, if the variable reference points to the similar types of object in memory. That is a " shallow comparison ".   The equals () - gives the results of run

Cross platform stock market game, Cross platform stock market game Proje...

Cross platform stock market game Project Description: I want someone to develop a simple stock market game. This will mainly be a facebook and android app, face book being mo

Java application - gui and backend projects, JNLP/ Java Application - GUI a...

JNLP/ Java Application - GUI and Backend Projects Project Description: I am looking for assist in making changes to a complex java application. System launches from web pa

Implement queues - linked list, Implement Queues / Linked List Project D...

Implement Queues / Linked List Project Description: In this project, two kinds of queue are implemented: LinkedQueue implements FIFOQueueInterface { .... } and LLQueueItr imp

#titleArray to store 10messages of type String.., AskWrite an application t...

AskWrite an application that uses an Array to store 10messages of type String. You will store this Array with 10 messages of your choosing. For example, a message could be “I love

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