题解 | #统计字符#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while(in.hasNextLine()){
            String str = in.nextLine();
            if(str.length()>= 1 && str.length()<=100){
                String EnStr = str.replaceAll("[^a-zA-Z]+","");
                String nullStr = str.replaceAll("[\\S]+","");
                String dgStr = str.replaceAll("[^0-9]+","");
                String otherStr = str.replaceAll("[a-zA-Z0-9\\s]","");
                System.out.println(EnStr.length());
                System.out.println(nullStr.length());
                System.out.println(dgStr.length());
                System.out.println(otherStr.length());
            }
        }


    }
}