字符串分类统计JAVA题解简单易懂

解题思路:

注意事项:

参考代码:

import java.util.Scanner;

public class Main {

   public static void main(String[] args) {

     Scanner sc = new Scanner(System.in);
    String str = sc.nextLine();
    int A = 0, num = 0, trim = 0, out = 0;
    for (int i = 0; i < str.length(); i++) {
           if (str.charAt(i) == ' ') trim++;
           else if (str.charAt(i) >= '0' && str.charAt(i) <= '9') num++;
           else if (str.toLowerCase().charAt(i) >= 'a' && str.toLowerCase().charAt(i) <= 'z') A++;
           else out++;
    }
            System.out.println(A + " " + num + " " + trim + " " + out);

   }

}