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

Preventing applet based social engineering attacks, Preventing Applet Based...

Preventing Applet Based Social Engineering Attacks To help avoid this, Java applet windows are specifically labeled as such along with an ugly bar that says: "Warning: Applet W

Write a program to find the area under the curve y = f(x) in, #question.Wri...

#question.Write a program to find the area under the curve y = f(x) in java.

What is runnable jar archives, What is Runnable JAR archives You can ru...

What is Runnable JAR archives You can run a program stored within the JAR archive that has a main() method like this: $ java -cp eharold.jar MainClassName You must use the f

Methods in java, public class Foothill {    public static void main(String[...

public class Foothill {    public static void main(String[] args)    {       Client person_1 = new Client("Bruce Ruprecht", 16000, 10);       Writer writer_1 = new Writer("Adam Buf

Array method, frequently used java array method

frequently used java array method

Information retrieval during multi-agent system, Information Retrieval duri...

Information Retrieval during Multi-Agent System with Data Mining in Cloud Computing Project Description: I have proposed one research model on "Information Retrieval during M

Password Generator Software, In this exercise, I want you to generate passw...

In this exercise, I want you to generate password based on random number generator. Develop an application that keeps track of the URL, username and password. I have listed few st

Important nodes, there are N nodes in a graph, the graph isuni directional ...

there are N nodes in a graph, the graph isuni directional with M edges of these M nodes in a graph, there are K nodes which are important nodes. given initial position I within thi

Explain instance variable, What will be the default values of all the eleme...

What will be the default values of all the elements of an array explained as an instance variable? If the array is an array of primitive types, then all the elements of the arr

Inheritance, Draw an inheritance hierarchy to represent a shoe object. The...

Draw an inheritance hierarchy to represent a shoe object. The base class should have derived classes of Dress Shoes, Tennis Shoes and Boots.

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