SCJP 1.6版考題 110
出自 陳富國維基館
Given: 11. public static void test(Sting str){ 12. int check = 4; 13. if(check = str.length()){ 14. System.out.print(str.charAt(check -= 1) + ", "); 15. }else{ 16. System.out.print(str.charAt(O) + ", "); 17. } 18. } and the invocation: 21. test("four"); 22. test("tee"); 23. test("to"); What is the result? A. r, t, t, B. r, e, o, C. Compilation fails. D. An exception is thrown at runtime.
解答
Ans: C
解說:
13. if (check = str.length()) --> if (check == str.length()) { 在Java裏,所有條件式皆需是boolean型態,不能像在C/C++時代,以非零是true的觀念來看! 上式是因為check是整數型態,而check == str… 最終是boolean型態
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