檢視 SCJP 1.6版考題 123 的原始碼

 Given:
 11. public static void parse(String str){
 12.   try{
 13.     float f = Float.parseFloat(str);
 14.   }catch(NumberFormatException nfe){
 15.     f = 0;
 16.   }finally{
 17.     System.out.println(f);
 18.   }
 19. }
 20. public static void main(String[] args) {
 21.   parse("invalid");
 22. }
 
 
 What is the result?
  A. 0.0
  B. Compilation fails.
  C. A ParseException is thrown by the parse method at runtime.
  D. A NumberFormatException is thrown by the parse method at runtime.

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<span style="font-size:medium;">解答</span>

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<span style="font-size: medium;">Ans: B   </span>

<span style="font-size:medium;"> 解說:
F第15行與17行的f都是未宣告，宣告的f在第13行僅供try區塊中使用

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{{SCJP 1.6版考題講解}}