Java,hashSet计数
字符个数统计
http://www.nowcoder.com/questionTerminal/eb94f6a5b2ba49c6ac72d40b5ce95f50
import java.util.*;
public class Main{
public static void main(String [] args){
Scanner sc = new Scanner(System.in);
String str = sc.nextLine();
HashSet hs = new HashSet();
for(char c : str.toCharArray()){
hs.add(c);
}
System.out.println(hs.size());
}
}
