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