java 左移 右移

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 = 1
p<<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