What is the difference between an interface and a class in Java?

Question

hi friends,
can any one give precise difference between an interface and class in java.

Duplicate:

• http://stackoverflow.com/questions/258285/is-a-java-interface-an-abstract-class
• http://stackoverflow.com/questions/639592/why-are-interfaces-preferred-to-abstract-classes

Answer 1

Interfaces cannot contain implementation.

An interface is there to define a contract. Implementing an interface is declaring conformance to that contract.

Java does not support multiple inheritance but it does support implementing multiple interfaces.

Answer 2

These question has quite a few good answers.

Why are interfaces preferred to abstract classes

Why would I want to use interfaces

Difference between abstraction and polymorphism

Vartec noticed this one Is a Java interface an abstract class

Answer 3

http://stackoverflow.com/questions/258285/is-a-java-interface-an-abstract-class

Answer 4

Interface cannot be instantiated ( Objects cannot be created). Interface provides the signature.

You can create objects from class.