SCJP題庫第002題

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.

Ans: D

解說：(無)