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

Streaming and decorator construction in java i/o, Java output and input is ...

Java output and input is described in terms of an abstract concept named a " stream ", which is a sequence of data. There are 2 types of streams. 1.      Byte streams (8 bit

Program to insert item in tree, public class TreeTest {     public static v...

public class TreeTest {     public static void main(String args[])     {         Tree t = new Tree ();         System.out.println("Populating");         t.insertItem(1);         t

What is the importance of static variable, What is the importance of static...

What is the importance of static variable? Static variables are class level variables where all objects of the class refer to the similar variable. If one object alters the val

Small projects, i am doing java and want projects with solutions to practic...

i am doing java and want projects with solutions to practice more and more

Describe the java collections framework? , Comparable interface: The "Com...

Comparable interface: The "Comparable" allows itself to compare with other same types of object. The function compareTo() is specified in the interface. Several of the standa

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.

Networking, which concept is used to connect the networking in java

which concept is used to connect the networking in java

List the java class library, list The Java Class Library? Java holds an...

list The Java Class Library? Java holds an extensive library of pre-written classes you can use in your programs. These classes are separated into groups known as packages. Th

Android Development Project, Task I have an Android mobile app project tha...

Task I have an Android mobile app project that I''m trying to get profiles to transfer by connecting to a server at 23.23.175.213 port 1337. I have to send a json string to the se

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