I was exploring features of Java 8 and came across "Functional Interface".
As per my understanding, these interfaces can have some default implemented methods as :
@FunctionalInterface
public interface ComplexFunctionalInterface extends SimpleFuncInterface
{
default public void doSomeWork()
{
System.out.println("Doing some work in interface impl...");
}
default public void doSomeOtherWork()
{
System.out.println("Doing some other work in interface impl...");
}
}
But my doubt is, this what abstract class is for.
Why introduce functional interfaces.
Best Answer
Number of classes that can be extended:
1
Number of interfaces that can be implemented:
more than 1