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

2D arrays, write an application that stores at least five different departm...

write an application that stores at least five different department and supervisor names in a two dimensional array

Method overriding, how to write method overriding and example programe

how to write method overriding and example programe

Display array elements by using for-each loop, Need assignment help , on th...

Need assignment help , on the topic “Demonstrate a console-program” Demonstrate a console-program to create an array of integers and Initialize the array and assign the values i

What does the abstract keyword mean in front of a method, What does the " a...

What does the " abstract " keyword mean in front of a method and a class ?

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

Compiler design limit the loops, Problem : Compiler Design - Limit the loop...

Problem : Compiler Design - Limit the loops Rajni is a newbie to the programming and while learning the programming language he came to know the following rules: ???• Each program

What is action class, The Action Class is type of the Model and is a wrappe...

The Action Class is type of the Model and is a wrapper around the business logic. The purpose of Action Class is to change the HttpServletRequest to the business logic. To use the

Dialog window in Oracle by Java stored procedure, Is it possible to create ...

Is it possible to create any dialog window in Oracle in Java stored procedure?

Palindrome, palindrome is starting that reads both the ends.using string co...

palindrome is starting that reads both the ends.using string covert into character

What is the role of hub in networks, What is the role of hub in networks? ...

What is the role of hub in networks? The network traffic controller - elements of convential computer networks. Hub is used to link the different computers within the network i

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