java - Shifting a byte value -

i have following java program:

public class java {       public static void main(string[] args) {          byte a=64, b;         int i;          i=a<<2;         b=(byte)(a<<2);          system.out.println(i);         system.out.println(b);      }  } 

in program, how value of b zero? didn't it.

because byte 8 bits. , last 8 bits of int 0. if add result of integer.tobinarystring(int) like,

byte = 64; int = << 2; system.out.println(integer.tobinarystring(i)); byte b = (byte) (a << 2); 

you'll see output is

100000000 

so b (because 1 ninth bit) becomes

00000000 

(which 0).