Given:
10. public class ClassA{
11. public void methodA(){
12. ClassB classB = new ClassB();
13. classB.getValue();
14. }
15. }
And:
20. class ClassB{
21. public ClassC classC;
22.
23. public String getValue(){
24. return classC.getValue();
25. }
26. }
And:
30. class ClassC{
31. public String value;
32.
33. public String getValue(){
34. value = "ClassB";
35. return value;
36. }
37. }
And given:
ClassA a = new ClassA();
a.methodA();
What is the result?
A. Compilation fails.
B. ClassC is displayed.
C. The code runs with no output.
D. An exception is thrown at runtime.
答案：D
哪里出了问题？？
