package sort;
public class Test15 {
public static void main(String[] args) {
System.out.println(countone(2));
}
public static int countone(int n) {
int count = 0;
while (n != 0) { //此方法为最简单方法,效率高
//剑指offer解释全面
n = n & (n - 1);
count++;
}
return count;
}
}