题解 | #字符个数统计#
字符个数统计
http://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
HashSet<Object> hashSet = new HashSet<>();
String str = scanner.next();
char[] chars = str.toCharArray();
for (char aChar : chars) {
hashSet.add(aChar);
}
System.out.println(hashSet.size());
}
}
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