Why it is -126?

Question

int i=130;
byte b=(byte)i;
System.out.println(b);

Output: -126..

Explaination is needed;;

Answer 1

byte is not equally to a byte array so an integer of 130 is not 10000010 as binary

byte is a number class which can represent numbers between -128 and 127. Which creates it's memory size as big as 1 Byte = 8 bit.

So if you are at the top of the number class (127) and add one to it the you created a stack overflow and the result is, that your result is -128.
So in byte the addition of 127+1 = -128

This means for your example: 130 = 127 +3 = (127 + 1) + 2= -128+2 = -126