問題詳情
58
Which code, inserted at line 16, will cause a java.lang.ClassCastException?
(A) Alpha a = x;
(B) Foo f = (Delta)x;
(C) Foo f = (Alpha)x;
(D) Beta b = (Beta)(Alpha)x;
Which code, inserted at line 16, will cause a java.lang.ClassCastException?
(A) Alpha a = x;
(B) Foo f = (Delta)x;
(C) Foo f = (Alpha)x;
(D) Beta b = (Beta)(Alpha)x;