Abstract and Interface
What is interface? When time is most suitable for using interface? Why we use interface instead of abstract? What is the differences between abstract and interface?
View Answers
August 28, 2012 at 12:37 PM
An interface defines a set of methods but does not implement them. A class that implements the interface agrees to implement all of the methods defined in the interface
Difference Between Interface and Abstract Class
1)Main difference is methods of a Java interface are implicitly abstract and cannot have implementations. A Java abstract class can have instance methods that implements a default behavior.
2)Variables declared in a Java interface is by default final. An abstract class may contain non-final variables.
3)Members of a Java interface are public by default. A Java abstract class can have the usual flavors of class members like private, protected, etc..
4)Java interface should be implemented using keyword 'implements'; A Java abstract class should be extended using keyword 'extends'.
5)An interface can extend another Java interface only, an abstract class can extend another Java class and implement multiple Java interfaces.
6)A Java class can implement multiple interfaces but it can extend only one abstract class.
7)Interface is absolutely abstract and cannot be instantiated; A Java abstract class also cannot be instantiated, but can be invoked if a main() exists.
8)In comparison with java abstract classes, java interfaces are slow as it requires extra indirection.
For more information, visit the following link:
http://www.roseindia.net/help/java/a/interface-vs-abstract-class.shtml
Related Tutorials/Questions & Answers:
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 and Interface
Abstract and Interface What is interface? When time is most suitable for using interface? Why we use interface instead of abstract? What is the differences between abstract and interface? An interface defines a set
Abstract and Interface What is interface? When time is most suitable for using interface? Why we use interface instead of abstract? What is the differences between abstract and interface? An interface defines a set
Advertisements
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 and Abstract class
Interface and Abstract class Difference between Interface and Abstract class? Give some example Difference Between Interface and Abstract Class 1)Main difference is methods of a Java interface are implicitly
Interface and Abstract class Difference between Interface and Abstract class? Give some example Difference Between Interface and Abstract Class 1)Main difference is methods of a Java interface are implicitly
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 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... interface are abstract by default. Abstract method provides the standardization...() { System.out.println ("Moo! Moo!"); } } Why not declare an abstract class as an interface
? when should we use an abstract class? when should we use interface instead... interface are abstract by default. Abstract method provides the standardization...() { System.out.println ("Moo! Moo!"); } } Why not declare an abstract class as an 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? 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
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... my doubt Thank you Hi Friend, Interface: Java does
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... my doubt Thank you Hi Friend, Interface: Java does
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
Interface
Interface I need to implement the interface without overriding its method and also don't use abstract class for this. How to do
Interface I need to implement the interface without overriding its method and also don't use abstract class for this. How to do
interface
interface what the use of interface? An interface is one which has abstract methods(not defined just declared)and static or non static variables.Any class can implement(inherit)the interface and make use
interface what the use of interface? An interface is one which has abstract methods(not defined just declared)and static or non static variables.Any class can implement(inherit)the interface and make use
Interface in java with example
We are going to discuss about Interface in Java. Interface is blueprint of a class. Interface is a collection of abstract methods. Interface has only... all method in interface abstract and public. Multiple inheritance allows
We are going to discuss about Interface in Java. Interface is blueprint of a class. Interface is a collection of abstract methods. Interface has only... all method in interface abstract and public. Multiple inheritance allows
Interface
and abstract class interface ShapeInterface{ int l=0,b=0; public...Interface 1.Create an interface names ShapeInterface that has two methods and one constant and an abstract class named ShapeAbstract that has two
and abstract class interface ShapeInterface{ int l=0,b=0; public...Interface 1.Create an interface names ShapeInterface that has two methods and one constant and an abstract class named ShapeAbstract that has two
Interface
and abstract class interface ShapeInterface{ int l=0,b=0; public...Interface 1.Create an interface names ShapeInterface that has two methods and one constant and an abstract class named ShapeAbstract that has two
and abstract class interface ShapeInterface{ int l=0,b=0; public...Interface 1.Create an interface names ShapeInterface that has two methods and one constant and an abstract class named ShapeAbstract that has two
Using Abstract Class
Using Abstract Class We does not make a object of the abstract class. This class must be inherited. Unlike interface the abstract class may
Using Abstract Class We does not make a object of the abstract class. This class must be inherited. Unlike interface the abstract class may
Interface in JSP
the methods are abstract. There is no code associated with an interface. In an interface all the instance methods are public and abstract. Interfaces are always...Interface in JSP
the methods are abstract. There is no code associated with an interface. In an interface all the instance methods are public and abstract. Interfaces are always...Interface in JSP
Interface
for Interface in java? and want to know why they used interface instead of multiple inheritance? Thanks in advance An interface is one which has abstract... implement(inherit)the interface and make use of the methods(functions
for Interface in java? and want to know why they used interface instead of multiple inheritance? Thanks in advance An interface is one which has abstract... implement(inherit)the interface and make use of the methods(functions
interface
interface will the interface implements a interface Hi Friend, No. Interface can extends another interface but cannot implements it, because interface will not contain the implementation. Thanks
interface will the interface implements a interface Hi Friend, No. Interface can extends another interface but cannot implements it, because interface will not contain the implementation. Thanks
interface
interface Hi I have interface in that interface 3 methods are there , after some days client said that,i want to add one more method in that interface ,so how can add 4 method so that the implemented class did not affect
interface Hi I have interface in that interface 3 methods are there , after some days client said that,i want to add one more method in that interface ,so how can add 4 method so that the implemented class did not affect
interface
interface can we extend interface? Hi Friend, Yes an interface can be extended by other interface like using extends keyword interface A{ } interface B extends A{ } For Example: interface IntefaceA { void
interface can we extend interface? Hi Friend, Yes an interface can be extended by other interface like using extends keyword interface A{ } interface B extends A{ } For Example: interface IntefaceA { void
Abstract class,Abstract methods and classes
interface are abstract by default. Abstract method provides the standardization... Abstract methods and classes ... so many times the word abstract. In java programming language the word abstract
interface are abstract by default. Abstract method provides the standardization... Abstract methods and classes ... so many times the word abstract. In java programming language the word abstract
interface
interface What is marker interface ?? what is its use in java programming?? is this us in programming ??Explain is implementation with code
interface What is marker interface ?? what is its use in java programming?? is this us in programming ??Explain is implementation with code
interface
interface develop a library interface which has drawbook(),returnbook()(with fine),checkstatus() and reservebook() methods.all the methods tagged with public
interface develop a library interface which has drawbook(),returnbook()(with fine),checkstatus() and reservebook() methods.all the methods tagged with public
interface
interface develop a library interface which has drawbook(),returnbook()(with fine),checkstatus() and reservebook() methods.all the methods tagged with public
interface develop a library interface which has drawbook(),returnbook()(with fine),checkstatus() and reservebook() methods.all the methods tagged with public
interface
interface why do we need interface in java..if it`s usefull for to obtain multiple inheritance in the sense how it gonna be achieved...and i can...)...the y we need interface...THis is question often i heard from my developer
interface why do we need interface in java..if it`s usefull for to obtain multiple inheritance in the sense how it gonna be achieved...and i can...)...the y we need interface...THis is question often i heard from my developer
interface
interface What is the exact use of interface in real time scenario? some people says that interface provides multiple inheritance. Is it true...; Through interface, we can achieve the multiple inheritance. Java does
interface What is the exact use of interface in real time scenario? some people says that interface provides multiple inheritance. Is it true...; Through interface, we can achieve the multiple inheritance. Java does
Interface
Interface Declare an Interface called property containting a method compute price to compute &return the price.The inerface is to be implemented by follwaing two class (1)Bungalow&(2)Flat both the lasses have following
Interface Declare an Interface called property containting a method compute price to compute &return the price.The inerface is to be implemented by follwaing two class (1)Bungalow&(2)Flat both the lasses have following
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
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
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 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
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
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
Ads
