Is there any technical difference between a subclass and an inherited class?

Question

Is there any technical difference between a class which inherits from another class and a class which is a subclass of it? What's the difference between A and B in the following code:

A)

public class foo {
 ...
 private class bar {...}
}

B)

public class foo { ...}

private class bar extends foo {...}

Answer 1

You're mixing terms. A subclass is the same as an inherited class.

In example A, bar is an inner class. An inner class is like a nested type. bar can see all the private stuff from foo but it's not itself a foo (you can't cast bar to foo).