Chapter 5 Question 13. Given:
1. class Ring {
2. final static int x2 = 7;
3. final static Integer x4 = 8;
4. public static void main(
String[] args) {
5. Integer x1 = 5;
6. String s = "a";
7. if(x1 < 9) s += "b";
8. switch(x1) {
9. case 5: s += "c";
10. case x2: s += "d";
11. case x4: s += "e";
12. }
13. System.out.println(s);
14. }
15. }
What is the result?
A. abc
B. abcde
C. Compilation fails due only to an error on line 7.
D. Compilation fails due only to an error on line 8.
E. Compilation fails due only to an error on line 10.
F. Compilation fails due only to an error on line 11.
G. Compilation fails due to errors on multiple lines.
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Answer:
F is correct. A switch statement requires its case expressions to be constants, and wrapper variables (even final static ones) aren�t considered constants. The rest of the code is correct.
A, B, C, D, E, and G are incorrect based on the above. (Objective 2.1)
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my question is...x2 is final static, how would it go through? (just because it is not a wrapper class?)