Interface

[usermahesh]

what is the difference between interface and abstract class real time example?

[sunde887]

Interface is basically a fully abstract class. An abstract class can have actual methods as well as abstract. It's generally better to use interfaces. You can implement as many interfaces as you want, but only extend one class.

[usermahesh]

ya i know that ,but we can use abstract class with only abstract methods instead of interface,can you give real time example.

[sunde887]

Check the java source files, in java.util.collection you will see classes like "AbstractSet", "AbstractList", etc.

You can also get lots of examples with google.

[usermahesh]

real world example,regarding interface.

[Norm]

Interface is basically a fully abstract class.

Not quite.
You can implement many interfaces
but you can only extend one class.

I look at interfaces as part of the tight typing part of java. It allows you to give another type to a class so the compiler can check when a specific type is required as an arg to a method. There are other uses also. Like Serializable that is a flag that can be checked to see if a class can be processed a certain way.

[12345]

what is abstract

[12345]

why are using abstract in java

[12345]

what is trasient and why are using this

[DarrylBurke]

The question is off topic for this forum, which is for member introductions. Locking up here.

db