SCJP題庫第159題

Given:

11. double input = 314159.26;

12. NumberFormat nf = NumberFormat.getInstance(Locale.ITALIAN);

13. String b;

14. //insert code here

Which code, inserted at line 14, sets the value of b to 314.159,26?

A. b = nf.parse(input);

B. b = nf.format(input);

C. b = nf.equals(input);

D. b = nf.parseObject(input);

Ans: B

解說:

14行插入那一行設定了b物件的值為314.159,26

parse(剖析)的語意一般是從字串轉成所要的類別型態物件，如Integer.parseInt

NumberFormat中的format方法是將數值以所指定的格式輸出，回傳值型態是String