public class Qiu {
int count(byte a){
int num =0;
while(a!=0){
//与操作
num = num + (a&0x01);
System.out.println( num);
//向右移位
a=(byte) (a>>1);
}
return num;
}
public static void main(String[] args){
Qiu qiu = new Qiu();
System.out.println( qiu.count((byte) 9));
}
}