Interfaces and Abstract Classes

Home Answers Viewqa Development-process Interfaces and Abstract Classes

QuestionAsk Questions?

Shashidhar Sharma

Interfaces and Abstract Classes
1 Answer(s) 2 years and 10 months ago
Posted in : Development process

What are the Scenarios where we use Interface and Abstract Classes?

View Answers

July 13, 2010 at 10:52 AM

Hi Friend,

Interface:

Java does not support Multiple Inheritance but the multiple inheritance can be achieved by using the interface.

Interfaces are useful when you do not want classes to inherit from unrelated classes just to get the required functionality.

It relate classes from different types of hierarchy.

Abstract Class:

Any class that extends the abstract class has to provide the implementation to the abstract methods. Hence these classes can be used as a skeleton to similar classes where some common functionality may be required. Such functionality can also be embedded into these classes.

Abstract class prevents from instantiating a class that is supposed to be extended first.

For more information, visit the following links:

http://www.roseindia.net/help/java/a/java-abstract-class.shtml
http://www.roseindia.net/java/master-java/abstract-class.shtml
http://www.roseindia.net/java/master-java/interface.shtml

Thanks

Interfaces and Abstract Classes - Development process
Interfaces and Abstract Classes What are the Scenarios where we use Interface and Abstract Classes? Hi Friend, Interface: Java does... by using the interface. Interfaces are useful when you do not want classes

interfaces
type whose members are classes, interfaces, constants and abstract methods... implements all the abstract methods specified by the interface or interfaces...interfaces how we can define relationship between simple classes

Abstract and Interface
abstract classes, java interfaces are slow as it requires extra indirection... multiple interfaces but it can extend only one abstract class. 7)Interface...Abstract and Interface What is interface? When time is most suitable

Summary: Classes, Interfaces
Java: Summary: Classes, Interfaces Packages package package-name; Class Definition A class definition prototype: visibility class class-name [extends parent-class] [implements interface-name...] { class-body } nameMeaning

Abstract class,Abstract methods and classes
Abstract methods and classes ... is used with methods and classes. Abstract Method An abstract method one...(); Abstract Class In java programming language, abstract classes

What is Abstract classes in Java?
What is Abstract classes in Java? What is Abstrack class in Java..., Hi, In Java programming language we are used the Java Abstract class to declare some common characteristics of subclasses.This Abstract class

Inheritance, abstract classes
Inheritance, abstract classes Hi. I wish to thank you for answering... a little lost with child classes, but here goes and don't know what to call... method for the balance. Also included two abstract get methods-one for each

Abstract class and interface in Java
abstract class and interfaces in Java? Differences between an interface and an abstract class: At the same time multiple interfaces can... variables) and non-public members abstract classes may or may not be a little bit

interfaces,exceptions,threads
interfaces,exceptions,threads SIR,IAM JAVA BEGINER,I WANT KNOW THE COMPLETE CONEPTS OF INTERFACES,EXCEPTIONS,THREADS Interface An interface is one which has abstract methods(not defined just declared)and static

Interface and Abstract class
be invoked if a main() exists. 8)In comparison with java abstract classes, java...Interface and Abstract class Difference between Interface and Abstract class? Give some example Difference Between Interface

Abstract Classes - Java Interview Questions
Abstract Classes Why we cann't instantiate a Abstract Classes? Even if an Abstract Class does not have any abstract methods, but declaring the class as abstract prevents it from creating an instance. Why? Thanks in Advance

Interface Vs Abstract Class
) and non-public members abstract classes may or may not be a little bit... Interface Vs Abstract Class There are three main differences between an interface and an abstract

abstract class and interface - Java Beginners
of abstract class? Hi friend, Abstract classes In java programming language, abstract classes are those that works only as the parent class... from the abstract class (base class). Abstract classes are not instantiated

abstract class and overriding - Java Beginners
friend, Abstract class : In java programming language, abstract classes...). Abstract classes are not instantiated directly. First extend the base class and then instantiate (create objects). Abstract classes are generic in nature

Abstract methods and classes
Abstract methods and classes ... is used with methods and classes. Abstract Method An abstract method one...(); Abstract Class In java programming language, abstract classes

Classes and Interfaces of the I/O Streams
Classes and Interfaces of the I/O Streams Classes: The following listing of classes...;ObjectStreamClass Serialization's descriptor for classes.

Abstract Factory Pattern
can only access to these objects through their abstract interfaces. It defines... Abstract Factory Pattern II Abstract Factory Pattern : This pattern is one level

Interfaces in flex
Interfaces in flex Hi..... Please tell me about... What... interface defines a marker interface. Classes that support this interface... is intended to be used by classes that obtain their style values from other

abstract class
abstract methods. Abstract classes cannot be instantiated, but they can be extended...abstract class Explain the concept of abstract class and it?s use with a sample program. Java Abstract Class An abstract class

Java: Interfaces
does, but abstract classes do allow static method definitions, and interfaces... cause, not that it should have been abstract! A very common use of interfaces... Interfaces Classes are used to represent something that has attributes (variables

Uses of abstract class & interface - Java Beginners
the interface. Interfaces are useful when you do not want classes to inherit... classes from different types of hierarchy. Abstract Class: Any class... into these classes. Abstract class prevents from instantiating a class

Abstract class and abstract method
Some key points about abstract methods are as following An abstract modifier identifies abstract classes and methods An abstract methods cannot be private because it defined in the other class. An abstract methods cannot

Java Abstract Class
. It may or may not have abstract methods. Abstract classes cannot be instantiated.... Which helps us to organize our classes based on common methods. An abstract class... is unique to specific classes. So you implement the superclass as an abstract

java interfaces implementation
java interfaces implementation hai I have defined one inter face like Maths taking methods like add(), sub(), mul()in interface I take different implementation classes for add() method and sub()and mul() when i trying

interfaces - Java Beginners
extends another interface?in case of classes when a sub class extends super class, super class constructor runs.what about interfaces? Hi Friend.... Inheritance is the mechanism through which we can derived classes from other

Java Abstract Class Example
the behaviour of classes from the outside environment. Abstract class can be created... and some are unique to specific classes. An abstract class should...Java Abstract Class Example In this section we will read about the Abstract

abstract class - Java Beginners
use becomes necessary and useful ?give some examples of abstract classes..., In java programming language, abstract classes are those that works only... inherited from the abstract class (base class). Abstract classes

Implementation code inside interfaces
Implementation code inside interfaces 2001-01-25 The Java Specialists' Newsletter [Issue 006] - Implementation code inside interfaces Author: Dr. Heinz... code than in interfaces, but I want to show you what is possible with inner

abstract wizard form controller
abstract wizard form controller Hi In roseindia for abstract wizard form controller example contains half of the code. please send the remaing half of the code like controller classes

Interface and Abstract class
methods and these method implemented by sub classes. Abstract class definition...Interface and Abstract class hello,, Can some body tell me what is the difference between an Interface and an Abstract class? hi, Very

Abstract class - Java Beginners
are overrided in which that is implemented . thats all abt abstract classes...Abstract class Why can use abstract class in java.?when abstract class use in java.plz Explain with program. abstract class abs{ public

Collection Interfaces
of several interfaces, and classes that implement those interfaces, contained within... Collection Interfaces ... of objects. Different interfaces describe different types of functionalities

FileFilter
. There are several file filtering classes and interfaces in Java, which often.... An abstract class that you must extend, defining accept(f

Abstract class or methods example-3

Abstract Class in Java
. An abstract class cannot be instantiated. Abstract classes can be extended into sub classes. Abstract class can be declared as: abstract class...Abstract class in Java is a class that is declared using abstract keyword

What is AWT in java
available with JDK. AWT stands for Abstract Windowing Toolkit. It contains all classes... interfaces and classes as follows: Interfaces and Descriptions... classes. Classes and Descriptions of AWT Package

The abstract Keyword : Java Glossary
is available for other classes to extend by other classes. Abstract keyword... provides a way to extend an actual class. We will not use new on abstract classes... on classes and methods. In case of class declared with an abstract keyword

Graphical User Interfaces
Graphical User Interfaces A class library is provided by the Java programming language which is known as Abstract Window Toolkit (AWT). The Abstract Window Toolkit

Collections Overview
of the methods in the data structure classes are those of the interfaces... classes and interfaces, are in the java.util package. Indentation shows the class...;T> // Interface requires compareTo() Concrete classes and interfaces

PHP Abstract Class
PHP Abstract Class: Abstract classes and methods are introduced in PHP 5. The concept behind the abstract class is that we need to extend this class by its descendant class(es). If a class contains abstract method then the class must

Advanced Concepts with Classes - JDBC
Advanced Concepts with Classes Advanced Concepts with Classes... you Employees in a company are divided into the classes Employee, HourlyPaid...: Employee class getName computePay?as an abstract method HourlyPaid class

Explain final class, abstract class and super class.
or may not have abstract methods. Abstract classes cannot be instantiated...Explain final class, abstract class and super class. Explain final class, abstract class and super class. Explain final class, abstract

What is the base class of all classes?
What is the base class of all classes? Hi, What is the base class of all classes? thanks Hi, The base class is nothing but the Abstract class of Java programming. We uses the syntax for base class of all

Introduction to Collections Framework
Framework provides a well-designed set of interfaces and classes for storing... implementation of interfaces and algorithms. Basically it is a unified architecture that consists the following collections: Interfaces

classes

Introduction to collection Implementations
-designed set of interfaces and classes used for storing and manipulating groups... for increasing performance. It includes implementations of interfaces... the collection interfaces. Implementations are also responsible for documenting

Interface in Java
. Difference between Interfaces and abstract classes Some important difference... are similar to abstract classes but the major difference between these two is that interface have all the methods abstract while in case of abstract classes must have

Java API
Java API Java API Java API is not but a set of classes and interfaces that comes with the JDK. Java API is actually a huge collection of library

Various time classes
Java NotesVarious time classes Solving all the date and time problems... arithmetic, leap seconds, ...). You will find several classes useful for handling.... java.util.Calendar - From the Java documentation: "Calendar is an abstract base class

Ask Questions?

If you are facing any programming issue, such as compilation errors or not able to find the code you are looking for.

Ask your questions, our development team will try to give answers to your questions.

Tutorial Topics