Suppose that the class Mystery is derived from the class Secret. Consider the following statements. Secret mySecret = new Secret(); Secret secRef; Mystery myMystery = new Mystery(); Mystery mysRef; secRef = myMystery; Which of the following statements is legal in Java? (i) mysRef = (Mystery) mySecret; (ii) mysRef = (Mystery) secRef;
A) Only (i)
B) Only (ii)
C) Both (i) and (ii)
D) None of these

Question

Quizplus · Accepted Answer

Explanation: In Java, you can cast a superclass reference to a subclass reference only if the object being referred to is actually an instance of the subclass. In statement (ii), `secRef` is assigned `myMystery`, which is an instance of `Mystery`, so the cast is valid. In statement (i), `mySecret` is an instance of `Secret`, not `Mystery`, so the cast would result in a `ClassCastException`.

Suppose That the Class Mystery Is Derived from the Class