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

Need a new e- payment gateway, Need a new E- payment gateway Project Des...

Need a new E- payment gateway Project Description: I need a new payment gateway of my own. Anyone who has previous experience in preparing a new payment gateway. I mean new p

Area under the curve, Write a program to find the area under the curve y = ...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can b

Assignments, Define a function that will take a box type of object as argum...

Define a function that will take a box type of object as argument and return a box object whose dimension is 10 times more than the object

Polymoethism, write a java program to test for class Person Student facult...

write a java program to test for class Person Student faculty Employee

Design patterns which are used in struts , Struts is depend on m...

Struts is depend on model 2 MVC (Model-View-Controller) architecture. Struts controller uses the command design pattern and the action classes use the adapter design pattern. The p

What is meant by semantic error, What is meant by semantic error? Occur...

What is meant by semantic error? Occur although a statement executes and has an effect not intended by the programmer and Frequently times occur just in unusual & infrequent ci

Difference between stringbuffer and string class, Define the difference be...

Define the difference between StringBuffer and String class?

Game, any example of games that is created by java ?

any example of games that is created by java ?

Explain about the interpreter in java, Machines should have Java interprete...

Machines should have Java interpreter for the Java byte code to get implemented. Linking is a very simple process and this feature helps while developing applications. Java compile

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