LeetCode. Number Of 1Bits. JDK7

NumberOf1Bits.java

import java.util.*;

    public static int hammingWeight(int n) {
        int cnt = 0;
        while(n != 0){
            if(0 != n%2){ //if(1 == n%2){
                cnt++;
            }
            n = n >>> 1;
        }
        return cnt;
    }

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long num = sc.nextLong();
        System.out.println(hammingWeight(num));
    }
}