关于下列程序片断，说法正确的是:(     )

 1.public class Test
 2.{
 3.    public static void main(String args[])
 4.    {
 5.        byte b = 100;
 6.        int i = b;
 7.        int a = 2000;
 8.        b = a;
 9.        System.out.println(b);
10.    }
11.}