What is the output for the below code ?

Jatin Dubey • 3.78K Points
Extraordinary

Q. What is the output for the below code ?

Code:

1. public class Test{
2.       public static void main(String[] args){
3.             byte b = 6;
4.             b+=8;
5.             System.out.println(b);
6.             b = b+7;
7.             System.out.println(b);
8.       }
9. }

(A) 14 21
(B) 14 13
(C) Compilation fails with an error at line 6
(D) Compilation fails with an error at line 4

Correct Answer - Option(C)
Views: 200
Filed under category JAVA

Explanation by: Jatin Dubey

int or smaller expressions always resulting in an int. So compiler complain about Type mismatch: cannot convert from int to byte for b = b+7; But b += 7; // No problem because +=, -=, *=, and /= will all put in an implicit cast. b += 7 is same as b = (byte)b+7 so compiler not complain.

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