SCJP 1.6版考題 002

1. public class TestString1{
2.   public static void main(String[] args){
3.     String str = "420";
4.     str += 42;
5.     System.out.print(str);
6.   }
7. }


What is the output?
   A. 42
   B. 420
   C. 462
   D. 42042
   E. Compilation fails. 
   F. An exception is thrown at runtime.

解答

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Ans: D

解說: 無