SCJP 1.6版考題 113

Given:
10. public class Foo{
11.   static int[] a;
12.   static{ a[0] = 2;}
13.   public static void main( String[] args){}
14. }


Which exception or error will be thrown when a programmer attempts to run this code?
  A. java.lang.StackOverflowError
  B. java.lang.IllegalStateException
  C. java.lang.ExceptionInInitializerError
  D. java.lang.ArrayIndexOutOfBoundsException

解答

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Ans: C

解說: 在static初始區塊發生錯誤會跑出java.lang.ExceptionInInitializerError，a[0]存取一個不存在的陣列物件而發生錯誤！