This is a stub. It needs an example of an error caused due to using the Base class's object where the subclass's object was expected. It should not produce a RuntimeException (ClassCastException) in order to qualify.
class Base {
public Object clone() throws CloneNotSupportedException {
return new Base();
}
protected static void doLogic() {
System.out.println("Superclass doLogic");
}
}
class Subclass1 extends Base {
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
protected static void doLogic() {
System.out.println("Subclass doLogic");
}
public static void main(String[] args) {
Subclass1 s = new Subclass1();
try {
Object sc = s.clone(); // get's Base obj instead of subclass'
System.out.println(sc.getClass().hashCode()); // a possible mistake
// ((Subclass1)sc).doLogic(); // Produces ClassCastException, disqualified
} catch (CloneNotSupportedException e) { /* ... */ }
}
}