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

What is the string concatenation, What is the String Concatenation + Op...

What is the String Concatenation + Operator is employed to concatenate strings - System.out.pritln ("Hello" + "World") will print Hello World on console String concatenat

Create objects of student class by calling default, Create objects of stude...

Create objects of student class by calling default Create objects of student class by calling default, parameterize and copy constructor Call student class different methods on

Simon game project, i''m trying to make a code to make the simon says game ...

i''m trying to make a code to make the simon says game and i can''t figure it outt

Three ways in which a thread can enter the waiting state, What are three wa...

What are three ways in which a thread can enter the waiting state ?

What are the sub categories of ai explain, What are the Sub categories of A...

What are the Sub categories of Artificial Intelligence? Briefly explain any two. 1. Robotics :  These are the machines that are computer programmed and perform work that was pr

Zhtml requirements, In addition to your Java code requirements, you also ne...

In addition to your Java code requirements, you also need to enhance the ZHTML for your application. As before, you can continue working with the page(s) you used for the previous

Explain why java does not support multiple inheritance, Question: (a) ...

Question: (a) Differentiate between the following terms using suitable examples of your own:- (i) inheritance v/s composition (ii) subclass v/s superclass (iii) softwa

Need Project Ideas.., I need some Unique Idea About my final Year Project ....

I need some Unique Idea About my final Year Project . It could be a Website or an Android application. I want to create Something very unique which in some sense benefits a society

Project, How can i draw E-R diagram

How can i draw E-R diagram

What is invoking static methods, What is Invoking static methods If a m...

What is Invoking static methods If a method or field is declared static, you access it through using the class name rather than a reference to a particular example of the class

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