移位操作实现乘法运算

package java程序员面试笔试宝典;

public class 题8_4_1用移位操作实现乘法运算 {
	public static void main(String[] args) {
		System.out.println("3乘以2的2次方是"+"  "+getPowerOf2N(3, 2));
		System.out.println("5乘以2的3次方是"+"  "+getPowerOf2N(5, 3));
	}
	public static int getPowerOf2N(int m,int n){
		for (int i = 0; i < n; i++) {
			m=m<<1;
		}
//		System.out.println(m);
		return m;
	}
}