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

Describe overriding methods, Describe Overriding Methods ? Assume that...

Describe Overriding Methods ? Assume that one day you've just finished your Car class. It's been plugged into your traffic simulation that is chugging along merrily simulating

Change encrypted hsql database into csv format, Change encrypted HSQL datab...

Change encrypted HSQL database into CSV format Project Description: We have an encrypted HSQL Database which we have to convert into csv format. HSQL DB . We have java app

Explain bios in java language, Explain BIOS in java language? BIOS bas...

Explain BIOS in java language? BIOS basically stand for Basic input/output system it is also called as the system BIOS or ROM BIOS is a de facto standard describing a firmware

Message "the quick brown fox jumps over the lazy dog"., public class Concat...

public class ConcatDemo { public static void main(String[] args) { String animal1 = "quick brown fox"; String animal2 = "lazy dog"; String article = "the";

Student, what are Objects and Fields in java

what are Objects and Fields in java

Explain what is fontmetrics in java, Explain what is FontMetrics in Java? ...

Explain what is FontMetrics in Java? No word wrapping is completed when you draw a string in an applet, even if you embed newlines in the string along with \n. If you expect th

Programming help, writing a program to find common friends with the use of ...

writing a program to find common friends with the use of array

Program on remote procedure call on a cs architecture, This project simulat...

This project simulates a remote procedure call on a client-server architecture. You will create both the client and the server. The server will maintain a linked list. It must N

Forward action and include action, What is the difference among ForwardActi...

What is the difference among ForwardAction and IncludeAction? Ans) The difference is that you require to use the IncludeAction only if the action is going to be contained by ano

What is the difference between internet and intranet, What is the differenc...

What is the difference between Internet and Intranet ? Intranet and internet are 2 domains which are extremely a like but frequent segregated in order to manage security. Inter

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