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What is the output for the below 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

Answer and Explanation

Answer:Compilation fails with an error at line 6

Explanation:
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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