Answer Posted / farhad

A final class CANNOT be extended or subclassed however it can be instantiated:
final class A{
}

class B{
A a = new A(); //<<< instantiating final class A
We cannot say:
class B extends A //!!! that's a NO NO.
On the other hand abstract class can be subclassed but CANNOT be instantiated.
abstract class A{
}
class B extends A{
}

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