191 Number of 1 Bits

/*

* 32位无符号数最大为2147483647

* Java中没有无符号类型,所以此题不能用n%2的方法解题

*/

public class Solution {

// you need to treat n as an unsigned value

public int hammingWeight(int n) {

int bits = 0;

int t = 0;

while(n!=0){

bits += (n&1);

n = n >>> 1;

}

return bits;

}

}