第191題

Given:
11. //insert code here
12. private N min, max;
13. public N getMin() { return min; }
14. public N getMax() { return max; }
15. public void add(N added) {
16. if(min == null added.doubleValue() < min =" added;" max ="=""> max.doubleValue())
19. max = added;
20. }
21. }

Which two, inserted at line 11, will allow the code to compile? (Choose two.)

A. public class MinMax{
B. public class MinMax{
C. public class MinMax{
D. public class MinMax{
E. public class MinMax{
F. public class MinMax{
答案：DF
參考：11-1-2 Wrapper類別、12-3 泛型