题解 | #查找输入整数二进制中1的个数#
查找输入整数二进制中1的个数
http://www.nowcoder.com/practice/1b46eb4cf3fa49b9965ac3c2c1caf5ad
import java.util.*;
public class Main {
public static void main(String[] args){
Scanner sc=new Scanner(System.in);
while(sc.hasNext()){
String str=Integer.toBinaryString(sc.nextInt());
System.out.println(str.length()-str.replaceAll("1","").length());
}
}
}