Interested to Buy Any Domain ? << Click Here >> for more details...
Difference between abstract class and interface
- 100 Answers
- 301565 Views
- Accenture, Altruist, Baba Group, CitiGroup, Fiserv, HCL, IBM, iGate, Infosys, Jean Martin, Karthik Industries, Microsoft, OnDLine, TCS, I also Faced
- E-Mail Answers
Answer Posted / s.arun
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.
Variables declared in a Java interface is by default final. An abstract class may contain non-final variables.
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..
Java interface should be implemented using keyword “implements”; A Java abstract class should be extended using keyword “extends”.
An interface can extend another Java interface only, an abstract class can extend another Java class and implement multiple Java interfaces.
A Java class can implement multiple interfaces but it can extend only one abstract class.
Interface is absolutely abstract and cannot be instantiated; A Java abstract class also cannot be instantiated, but can be invoked if a main() exists.
In comparison with java abstract classes, java interfaces are slow as it requires extra indirection.
For m ore detail click on http://edugoing.com/qna/index.php?qa=1&qa_1=what-the-difference-between-an-interface-and-abstract-class
| Is This Answer Correct ? | 1 Yes | 1 No |
Post New Answer View All Answers
question related to table havi colspan and row span
Whats new features in Visual Studio 2012?
What are .net mobile controls features? : Microsoft dot net mobile
what is diffrent beatween localprinter and networkprinter
Explain the number or character entered through keyboard gets converted to equivalent ascii code & it get stored on ram in the binary form. What is the exact procedure on hardware that converts the ascii value to binary? : .NET Architecture
What is the .net class that allows the retrieval of a data element using a unique key?
What are the different pipelining hazards? : Dot net architecture
What is different about namespace declaration when comparing that to package declaration in java?
What actually happes when you add a something to arraylistcollection ?
What is cookie less session?
What is boxing and unboxing? Does it occure automaatically or you need to write code to box and unbox?
What are the types of application software?
What is the access level of the visibility type internal?
Define the mesi? : Dot net architecture
What is textbox control of .net mobile? : Microsoft dot net mobile
