Number of 1 Bits

Write a function that takes an unsigned integer and returns the number of 1 bits it has.

Example:

The 32-bit integer 11 has binary representation

00000000000000000000000000001011

so the function should return 3.

Note that since Java does not have unsigned int, use long for Java

public class Solution {
    public int numSetBits(long n) {
        int count=0;
        while(n!=0){
            if((n&1)==1)
                count++;
            n=n>>1;
        }
        return count;
    }
}