public class test{        public static void main(String[] args) {                int m = 9;        int n = m >> 3;                int p = 8;                int q=p <<2;        System.out.println("m>>3 = "+ n);                System.out.println("p<<3 = "+ q);    }}

结果

m>>3 = 1p<<3 = 32

左移n位，原来的数乘以2^n；右移n位，原来的数除以2^n，取整数部分