SCJP 1.6版考題 189
出自 陳富國維基館
23. Object[] myObjects = {
24. new Integer(12),
25. new String("foo"),
26. new Integer(5),
27. new Boolean(true)
28. };
29. Arrays.sort(myObjects);
30. for(int i=0; i<myObjects.length; i++){
31. System.out.print(myObjects[i].toString());
32. System.out.print(" ");
33. }
What is the result?
A. Compilation fails due to an error in line 23.
B. Compilation fails due to an error in line 29.
C. A ClassCastException occurs in line 29.
D. A ClassCastException occurs in line 31.
E. The value of all four objects prints in natural order.
解答
Ans: C
解說: myObjects這個集合物件裏不同型態的物件，不同型態的物件排序時(需進行比較)會產生例外。(第29行)
| ||||||||||||||||||||
