题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
import java.util.Scanner;
import java.util.HashSet;
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
HashSet<Character> set = new HashSet<>();
while (in.hasNext()) {
String a = in.next();
for(int i=0;i<a.length();i++){
if(a.charAt((i))>=0 && a.charAt((i))<=127){
set.add(a.charAt(i));
}
}
System.out.println(set.size());
}
}
}
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