Interface

[Mike Shn]

Does it possible in Java for interface to use Multiple inheritance?

[Dave Vick]

Mike
There is no multiple inheritance in Java. However, using interfaces you can simulate it. Interfaces let you extend multiple interfaces but not to extend multiple classes.
Put another way:
Both a class or an interface can inherit from more than one interface. A class, however, can only inherit from one other class.
Check out the following code:

these are all OK:
class MyClass implements Serializable, Runnable, SomethingElseable{...}
class MyClass extends SuperClass implements Runnable{...}
interface MyInterface extends Runnable, Serializable, Noteable {...}
this is bad:
class MyClass extends Thread, OtherClass{ ... } // a class can not extend more than one class
interface MyInterface extends Thread, Runnable  { ... } // an interface can not extend a class

hope that helps a little bit

[Shivaji Marathe]

Actually it is also possible to write code where one interface extends several others. Code like this compiles at least in JDK 1.3.1
Such as
interface InterBase extends InterSuper, InterAnother {
// methods here.
}