SCJP 1.6版考題 131

Given:
11. static void test() throws Error{
12.   if(true) throw new AssertionError();
13.   System.out.print("test ");
14. }
15. public static void main(String[] args){
16.   try{test();}
17.   catch(Exception ex){System.out.print("exception ");}
18.   System.out.print("end ");
19. }
 

What is the result?
 A. end
 B. Compilation fails.
 C. exception end
 D. exception test end
 E. A Throwable is thrown by main.
 F. An Exception is thrown by main.

解答

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Ans: E

解說:

Test方法丟出一個AssertionError物件，但此錯誤物件型態不會被17行補捉到，
因此main會丟出AssertionError(Throwable的子類別)而不正常結束
例外類別架構請參考講義258頁(SL-275)