Given:
|
1 2 3 4 5 6 7 8 9 |
public class MyFor3 { public static void main(String[] args) { int[] xx = null; for (int ii : xx) { System.out.println(ii); } } } |
What is the result?
A.
null
B. Compilation fails
C. An exception is thrown at runtime
D.
0
題解
程式會在第5行拋出NullPointerException，因為xx變數的儲存的陣列物件參考是null。
![[OCAJP][OCPJP]foreach的計次變數(?)](https://magiclen.org/wp-content/uploads/2016/02/java.png)
![[LPIC-1]Security 15](https://magiclen.org/wp-content/uploads/2016/06/LPIC-1-Logo-300x300-220x162.png){kind=logo}
![[HackerRank]樣本語法檢查器(Pattern Syntax Checker)](https://magiclen.org/wp-content/uploads/2016/03/1459099089_seo_programming-220x162.png)