The typecasting of data types works here, as we need end results in BYTE format.

The correct code is:

public class Exchange

{

public static void main(String[] args)

{

byte a = 23, b = 44;

a = (byte) (a + b);

b = (byte) (a - b);

a = (byte) (a - b);

System.out.println("a="+a, "b="+b);

}

}