Uses of abstract class & interface
Dear sir,I'm new to java. I knew the basic concepts of interface and the abstract class. But i dont know where can i use them. Still i'm struggling with this concepts. Please clear my doubt
Thank you
View Answers
June 14, 2010 at 5:47 PM
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
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
Related Tutorials/Questions & Answers:
Uses of abstract class & interface - Java Beginners
Uses of abstract class & interface Dear sir, I'm new to java. I knew the basic concepts of interface and the abstract class. But i dont... classes from different types of hierarchy. Abstract Class: Any class
Uses of abstract class & interface Dear sir, I'm new to java. I knew the basic concepts of interface and the abstract class. But i dont... classes from different types of hierarchy. Abstract Class: Any class
Interface and Abstract class
and Abstract class? Give some example Difference Between Interface and Abstract Class 1)Main difference is methods of a Java interface are implicitly...)Members of a Java interface are public by default. A Java abstract class can have
and Abstract class? Give some example Difference Between Interface and Abstract Class 1)Main difference is methods of a Java interface are implicitly...)Members of a Java interface are public by default. A Java abstract class can have
Advertisements
Interface and Abstract class
Interface and Abstract class hello,, Can some body tell me what is the difference between an Interface and an Abstract class? hi,ADS_TO_REPLACE_1 Very Good Question Abstract class is a class which contain one
Interface and Abstract class hello,, Can some body tell me what is the difference between an Interface and an Abstract class? hi,ADS_TO_REPLACE_1 Very Good Question Abstract class is a class which contain one
Abstract class and interface in Java
Abstract class and interface in Java What is the difference between abstract class and interfaces in Java? Differences between an interface and an abstract class: At the same time multiple interfaces can
Abstract class and interface in Java What is the difference between abstract class and interfaces in Java? Differences between an interface and an abstract class: At the same time multiple interfaces can
Interface vs abstract class
Interface vs abstract class Hai, Is there any possible to defining abstract methods in Interface
Interface vs abstract class Hai, Is there any possible to defining abstract methods in Interface
Interface Vs Abstract Class
Interface Vs Abstract Class There are three main differences between an interface and an abstract..., an interface is equivalent to a fully abstract class (a class with only public abstract
Interface Vs Abstract Class There are three main differences between an interface and an abstract..., an interface is equivalent to a fully abstract class (a class with only public abstract
abstract class and interface - Java Beginners
? when should we use an abstract class? when should we use interface instead...() { System.out.println ("Moo! Moo!"); } } Why not declare an abstract class as an interface.... For difference between interface and abstract class visit to : http
? when should we use an abstract class? when should we use interface instead...() { System.out.println ("Moo! Moo!"); } } Why not declare an abstract class as an interface.... For difference between interface and abstract class visit to : http
What are the difference between abstract class and interface?
What are the difference between abstract class and interface? What are the difference between abstract class and interface
What are the difference between abstract class and interface? What are the difference between abstract class and interface
Difference between abstract class and an interface
Difference between abstract class and an interface The difference between abstract class and interface is one of the most popular question in the interview... between abstract class and interface in java. Abstract class is a class
Difference between abstract class and an interface The difference between abstract class and interface is one of the most popular question in the interview... between abstract class and interface in java. Abstract class is a class
Abstract class and Interface - Java Magazine
Abstract class and Interface Dear Sir, Please anyone help me........I wane exact difference between Abstract class and Interface.what... abstract class AbstractExample { public AbstractExample(){ System.out.println
Abstract class and Interface Dear Sir, Please anyone help me........I wane exact difference between Abstract class and Interface.what... abstract class AbstractExample { public AbstractExample(){ System.out.println
where exactly we use interface and where abstract class?
where exactly we use interface and where abstract class? what is the use of interface over abstract class? and where we should use interface and where abstract class
where exactly we use interface and where abstract class? what is the use of interface over abstract class? and where we should use interface and where abstract class
Real Time Example Interface and Abstract Class - Java Beginners
Real Time Example Interface and Abstract Class Hi Friends, can u give me Real Time example for interface and abstract class.(With Banking Example
Real Time Example Interface and Abstract Class Hi Friends, can u give me Real Time example for interface and abstract class.(With Banking Example
Why does Java provide both abstract class as well as interface
Why does Java provide both abstract class as well as interface why does java have both abstract class as well as interface? what is the need or importance of having both
Why does Java provide both abstract class as well as interface why does java have both abstract class as well as interface? what is the need or importance of having both
Abstract and Interface
Interface and Abstract Class 1)Main difference is methods of a Java interface... declared in a Java interface is by default final. An abstract class may contain non... abstract class should be extended using keyword 'extends'. 5)An interface can
Interface and Abstract Class 1)Main difference is methods of a Java interface... declared in a Java interface is by default final. An abstract class may contain non... abstract class should be extended using keyword 'extends'. 5)An interface can
Abstract and Interface
Abstract and Interface what is the difference between Abstract and Interface accurateatly
Abstract and Interface what is the difference between Abstract and Interface accurateatly
abstract class
abstract class Explain the concept of abstract class and it?s use with a sample program. Java Abstract Class An abstract class is a class that is declared by using the abstract keyword. It may or may not have
abstract class Explain the concept of abstract class and it?s use with a sample program. Java Abstract Class An abstract class is a class that is declared by using the abstract keyword. It may or may not have
Abstract class
Abstract class j An Abstract class is a base class which... with an abstract keyword. For more information, visit the following links: http://www.roseindia.net/help/java/a/java-abstract-class.shtml http://www.roseindia.net/java
Abstract class j An Abstract class is a base class which... with an abstract keyword. For more information, visit the following links: http://www.roseindia.net/help/java/a/java-abstract-class.shtml http://www.roseindia.net/java
abstract class
abstract class abstract class AbstractClass{ } is possible and compile the class or any compile time error occur tell me the answer Blockquote
abstract class abstract class AbstractClass{ } is possible and compile the class or any compile time error occur tell me the answer Blockquote
abstract class
abstract class what is abstract class .why we use it or what is the need of this class? Abstract class is like base class which contains abstract method and cannot instantiated. Please go through
abstract class what is abstract class .why we use it or what is the need of this class? Abstract class is like base class which contains abstract method and cannot instantiated. Please go through
Using Abstract Class
class. This class must be inherited. Unlike interface the abstract class may...Using Abstract Class ... method should be abstract. We can't instantiate the object of the abstract class
class. This class must be inherited. Unlike interface the abstract class may...Using Abstract Class ... method should be abstract. We can't instantiate the object of the abstract class
Abstract class
Abstract class Calendar cal=Calendar.getInstance() We know that Calendar is an abstract class so it can't be instantiated. So how we can say that cal is an instance of Calendar??? Beginner Question I suppose. Thanks in advace
Abstract class Calendar cal=Calendar.getInstance() We know that Calendar is an abstract class so it can't be instantiated. So how we can say that cal is an instance of Calendar??? Beginner Question I suppose. Thanks in advace
Abstract class,Abstract methods and classes
interface are abstract by default. Abstract method provides the standardization...(); Abstract Class ADS_TO_REPLACE_2 In java programming language, abstract classes are those that works only as the parent class
interface are abstract by default. Abstract method provides the standardization...(); Abstract Class ADS_TO_REPLACE_2 In java programming language, abstract classes are those that works only as the parent class
Why Abstract Class?
Why Abstract Class? What is the use of Abstract Class if it has Zero Abstract methods
Why Abstract Class? What is the use of Abstract Class if it has Zero Abstract methods
Why Abstract Class?
Why Abstract Class? What is the use of Abstract Class if it has Zero Abstract methods
Why Abstract Class? What is the use of Abstract Class if it has Zero Abstract methods
Java Abstract Class
Java Abstract Class An abstract class is a class that is declared by using the abstract keyword... an abstract class. Which helps us to organize our classes based on common methods
Java Abstract Class An abstract class is a class that is declared by using the abstract keyword... an abstract class. Which helps us to organize our classes based on common methods
Abstract class and abstract method
be private because it defined in the other class. An abstract methods cannot... points about abstract methods are as following An abstract class may or may... also. An abstract class cannot be instantiated so it need to be a sub class
be private because it defined in the other class. An abstract methods cannot... points about abstract methods are as following An abstract class may or may... also. An abstract class cannot be instantiated so it need to be a sub class
variables and methods declared in abstract class is abstract or not
variables and methods declared in abstract class is abstract or not variables and methods declared in abstract class is abstract
variables and methods declared in abstract class is abstract or not variables and methods declared in abstract class is abstract
abstract class and overriding - Java Beginners
abstract class and overriding what is the difference between abstract class and overriding? Interface? Give some example program? Hi..._value(); } } Difference between abstract class and interface
abstract class and overriding what is the difference between abstract class and overriding? Interface? Give some example program? Hi..._value(); } } Difference between abstract class and interface
abstract class - Java Beginners
abstract class what exactly is abstract class and in which cases its... inherited from the abstract class (base class). Abstract classes... . e.g. abstract class A{ public abstract abs_value(); void show
abstract class what exactly is abstract class and in which cases its... inherited from the abstract class (base class). Abstract classes... . e.g. abstract class A{ public abstract abs_value(); void show
Abstract class - Java Beginners
Abstract class Why can use abstract class in java.?when abstract class use in java.plz Explain with program. abstract class abs{ public void display(){ } public abstract void display1(); } public class win
Abstract class Why can use abstract class in java.?when abstract class use in java.plz Explain with program. abstract class abs{ public void display(){ } public abstract void display1(); } public class win
why we use abstract class in java?
why we use abstract class in java? what is the the purpose of abstract class.Give example when to use abstract and when use interface
why we use abstract class in java? what is the the purpose of abstract class.Give example when to use abstract and when use interface
Explain final class, abstract class and super class.
Explain final class, abstract class and super class. Explain final class, abstract class and super class. Explain final class, abstract.... An abstract class is a class that is declared by using the abstract keyword. It may
Explain final class, abstract class and super class. Explain final class, abstract class and super class. Explain final class, abstract.... An abstract class is a class that is declared by using the abstract keyword. It may
Java Abstract Class Example
Java Abstract Class Example In this section we will read about the Abstract class. Abstract class in Java is a class which is created for abstracting the behaviour of classes from the outside environment. Abstract class can be created
Java Abstract Class Example In this section we will read about the Abstract class. Abstract class in Java is a class which is created for abstracting the behaviour of classes from the outside environment. Abstract class can be created
Abstract Class in Java
Abstract class in Java is a class that is declared using abstract keyword. It cannot be instantiated but can be extended into subclass. Abstract class cannot be instantiated means that new instances of an abstract class cannot
Abstract class in Java is a class that is declared using abstract keyword. It cannot be instantiated but can be extended into subclass. Abstract class cannot be instantiated means that new instances of an abstract class cannot
what's the purpose of constructor in abstract class?
what's the purpose of constructor in abstract class? what's the purpose of constructor in abstract class
what's the purpose of constructor in abstract class? what's the purpose of constructor in abstract class
What is an Abstract Class and what is it's purpose?
What is an Abstract Class and what is it's purpose? Hi, What is an Abstract Class and what is it's purpose? Thanks
What is an Abstract Class and what is it's purpose? Hi, What is an Abstract Class and what is it's purpose? Thanks
Can a abstract class be declared final?
Can a abstract class be declared final? Hi, Can a abstract class be declared final? Thanks
Can a abstract class be declared final? Hi, Can a abstract class be declared final? Thanks
abstract class - Java Interview Questions
abstract class Explain the abstract class and abstract method...://www.roseindia.net/java/master-java/abstract-class.shtml http://www.roseindia.net/help/java/a/java-abstract-class.shtml Hope that it will be helpful for you. Thanks
abstract class Explain the abstract class and abstract method...://www.roseindia.net/java/master-java/abstract-class.shtml http://www.roseindia.net/help/java/a/java-abstract-class.shtml Hope that it will be helpful for you. Thanks
Java-Abstract Class - Java Beginners
Java-Abstract Class Can a abstract class have a constructor ?When would the constructor in the abstract class be called ? Please give me with good...; Hi Friend, Yes. But Abstract class constructors will be called when its
Java-Abstract Class Can a abstract class have a constructor ?When would the constructor in the abstract class be called ? Please give me with good...; Hi Friend, Yes. But Abstract class constructors will be called when its
Can a abstract class be defined without any abstract methods?
Can a abstract class be defined without any abstract methods? hi, Can a abstract class be defined without any abstract methods? thanks
Can a abstract class be defined without any abstract methods? hi, Can a abstract class be defined without any abstract methods? thanks
overriding in derived class from abstract class
overriding in derived class from abstract class why should override base class method in derived class? Instead of override abstract class method, we can make method implementation in derived class itself know
overriding in derived class from abstract class why should override base class method in derived class? Instead of override abstract class method, we can make method implementation in derived class itself know
java abstract class - Development process
java abstract class how to save and run abstract class program... example, abstract class A { abstract void hi(); void hello() { System.out.println("This is a hello() method."); } } class B extends A { void hi
java abstract class how to save and run abstract class program... example, abstract class A { abstract void hi(); void hello() { System.out.println("This is a hello() method."); } } class B extends A { void hi
How to Declare Abstract Class in PHP ?
How to Declare Abstract Class in PHP ? hi, I am a PHP Beginners. As i am trying to make an application where i trying to declare the abstract class of PHP. Please any one explain me how to declare abstract class in PHP program
How to Declare Abstract Class in PHP ? hi, I am a PHP Beginners. As i am trying to make an application where i trying to declare the abstract class of PHP. Please any one explain me how to declare abstract class in PHP program
Ads