单项选择题
1. class A {
3. public String to String（） {
4. return “4”；
5. }
6. }
7. class B extends A {
8. public String toString（） {
9. return super.toString（） + “3”；
10. }
11. }
12. public class Test {
13. public static void main （String[] args） {
14. System.out.printIn（new B（））；
15. }
16. }
What is the result()？
A. Compilation succeeds and 4 is printed.
B. Compilation …………… is printed.
C. An error on line 9 cause compilation to fail.
D. An error on line 14 cause compilation to fail.
E. Compilation succeeds but an exception is thrown at line 9.
点击查看答案
相关考题
- 多项选择题 Given： 1. public class Method Over { 2. public void set Var （int a， int b， float c） { 3. } 4. } Which two overload the set Var method（）？
- 多项选择题 Whichtwo choicesareequivalent？（）
- 多项选择题 AnInterface is an interface. AnAdapter0 is a non-abstract， non-final class with a zero argument constructor. An Adapterl is a non-abstract， non-final class without a zero argument constructor， but with a constructor that takes one int argument. Which two construct an anonymous inner class（）？
