Cast reference of known type to an interface outside of type's hierarchy

Question

Say you have a clean class like this:

public class A {
    // Stuff
}

And a interface like this:

public interface G {
    /         


        

Answer 1

This is allowed at compile time, because the Java compiler lets you do this; it assumes you know what you're doing.

However, the JVM figures it out and throws a ClassCastException at runtime.