問題詳情
第37題Given:21. abstract class C1{22. public C1(){System.out.print(1);}23. }24. class C2 extends C1{25. public C2(){System.out.print(2);}26. }27. class C3 extends C2{28. public C3(){System.out.print(3);}29. }30. public class Ctest{31. public static void main(String[] a){new C3();}32. }What is the result?
(A) 3
(B) 23
(C) 32
(D) 123
(E) 321F. Compilation fails.G. An exception is thrown at runtime.
參考答案
答案：D
難度：適中0.547945
統計：A(9),B(37),C(9),D(80),E(3)