SCJP題庫第205題

 

Given:

12. import java.util.*;

13. public class Explorer2{

14.   public static void main(String[] args){

15.     TreeSet<Integer> s = new TreeSet<Integer>();

16.     TreeSet<Integer> subs = new TreeSet<Integer>();

17.     for(int i=606; i<613; i++)

18.       if(i%2 == 0) s.add(i);

19.       subs = (TreeSet)s.subSet(608, true, 611, true);

20.     s.add(629);

21.     System.out.println(s + " " + subs);

22.   }

23. }

What is the result?

A. Compilation fails.

B. An exception is thrown at runtime.

C. [608, 610, 612, 629] [608, 610]

D. [608, 610, 612, 629] [608, 610, 629]

E. [606, 608, 610, 612, 629] [608, 610]

F. [606, 608, 610, 612, 629] [608, 610, 629]

Ans: E

解說:
從JDK：subSet(E fromElement, boolean fromInclusive, E toElement, boolean toInclusive)

第一個和第三個參數是取值的範圍，第二個和第四個參數是指出是否包含範圍的值