Interface and Abstract class
Difference between Interface and Abstract class? Give some example
View Answers
September 13, 2012 at 3:42 PM
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
Ads
Related Tutorials/Questions & Answers:
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
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
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
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
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
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
that have the empty implementation. All the methods in any interface are abstract...(); Abstract Class In java programming language, abstract classes... to implement the methods inherited from the abstract class (base class
that have the empty implementation. All the methods in any interface are abstract...(); Abstract Class In java programming language, abstract classes... to implement the methods inherited from the abstract class (base 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...; --or-- Java provides a special type of class called an abstract class
Java Abstract Class An abstract class is a class that is declared by using the abstract keyword...; --or-- Java provides a special type of class called an abstract 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
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 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
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
