题解 | #统计字符#,忘记输出，搞得我还debug看了才知道问题。。。

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.hasNext()) {
            /*统计其中英文字符，空格字符，数字字符，其他字符的个数*/
            String line = in.nextLine();
            char[] chars = line.toCharArray();
            int english = 0;
            int empty = 0;
            int number = 0;
            int x = 0;
            for (int i = 0; i < chars.length; i++) {
                char c = chars[i];
                if (Character.isLetter(c)){
                    english++;
                    continue;
                }
                if (Character.isDigit(c)){
                    number++;
                    continue;
                }
                if (c == ' '){
                    empty++;
                    continue;
                }
                x++;
            }
            System.out.println(english);
            System.out.println(empty);
            System.out.println(number);
            System.out.println(x);
        }
    }
}