試題詳解

1. public class Drink implements Comparable{

2. public String name； 

3. public int compareTo(Object o){

 4. return 0；

 5. } 

6. }

 and:

 20. Drink one = new Drink()； 

21. Drink two = new Drink()； 

22. one.name = "Coffee"； 

23. two.name = "Tea"； 

24. TreeSet set = new TreeSet()； 

25. set.add(one)； 

26. set.add(two)；

 A programmer iterates over the TreeSet and prints the name of each Drink object. What is the result?
(A) Tea
(B) Coffee
(C) Coffee Tea
(D) Compilation fails.
(E) The code runs with no output.