SCJP 1.6版考題 117

Given:
11. class Converter{
12.   public static void main(String[] args){
13.   Integer i = args[0];
14.   int j = 12;
15.   System.out.println("It is " + (j==i) + " that j==i.");
16.   }
17. }


What is the result when the programmer attempts to compile the code and run it with the command java Converter 12?
 A. It is true that j==i.
 B. It is false that j==i.
 C. An exception is thrown at runtime.
 D. Compilation fails because of an error in line 13.

解答

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Ans: D

解說:

args的每一個元素皆是字串，無法指定給Integer型態(型態不符)
改為：Integer i = Integer.parseInt(args[0]);