第41題
Given:
1. public class KungFu{
2. public static void main(String[] args){
3. Integer x = 400;
4. Integer y = x;
5. x++;
6. StringBuilder sb1 = new StringBuilder("123");
7. StringBuilder sb2 = sb1;
8. sb1.append("5");
9. System.out.println((x == y) + " " + (sb1 == sb2));
10. }
11. }
What is the result?
SCJP 6.0 認證教戰手冊 黃彬華著 碁峰出版
22
(A) true true
(B) false true
(C) true false
(D) false false
(E) Compilation fails.
F. An exception is thrown at runtime.
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