BagJava

Question

Please can who explain code below
Why output - 128
byte b1 = 1;
while(b>0)
by++;
System.out.println(by);

Answer 1

Type range overflow. A byte has a range of -128 to 127. When you exceed the range it will wrap around to the opposite end of the range by x amount remaining in the mathematical operation.

I.E. 127 + 1 = -128
-128 - 1 = 127
125 + 5 = -126
etc

Answer 2

Byte can held numbers up to 128. After it full it flips the sign. So you get kind of value overflowing.