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

Array method, frequently used java array method

frequently used java array method

Area under curve, write a program to find the area under thecurve y=f(x)bet...

write a program to find the area under thecurve 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 be found by

I need ios native app developer, I want someone to help me prepare a simple...

I want someone to help me prepare a simple inventory system. I am not a programmer trying to learn as i go. Skills required: Android, Java, iPhone, Mobile Phone, Objective

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

Describe what is meant by a constructor in java, Question: (a) Describe...

Question: (a) Describe what is meant by a ‘constructor' in Java. Use a simple example to illustrate your answer. (b) Differentiate between a class method and an instance me

Java, Write a program called Power that displays the positive powers of 2. ...

Write a program called Power that displays the positive powers of 2. When the user enters the exponent at a prompt, the program displays 2 to that power. The program halts when the

Intro to Programming, Overall Requirements Every phone number is broken up ...

Overall Requirements Every phone number is broken up into sections as shown below: Country Code Area Code Prefix Line Number 1 919 882 5000 Write a program to separate out a ph

What is aop(aspect oriented programming)?, Separating your business logic w...

Separating your business logic with other functionality such as services, Loggers etc, making classess more cohesive.

Describe validate() and reset() methods, Validate() : Used to validate prop...

Validate() : Used to validate properties after they have been populated; known as before FormBean is handed to Action. Returns a collection of ActionError as ActionErrors. Followin

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