[编程入门]字符串分类统计-题解(Java代码)

package practice.C;
import java.util.Scanner;
/**
 * 字符串分类统计
 * 
 * @author 涂图
 *
 */
public class Main {
    public static void sc(String a) {
        char[] arr = a.toCharArray();
        int letter = 0;
        int space = 0;
        int character = 0;
        int num = 0;
        for (int i = 0; i < arr.length; i++) {
            arr[i] = a.charAt(i);
            if (arr[i] >= 65 && arr[i] <= 90 || arr[i] >= 97 && arr[i] <= 122) {
                letter++;
            } else if (arr[i] >= 48 && arr[i] <= 57) {
                num++;
            } else if (arr[i] == 32) {
                space++;
            } else {
                character++;
            }
        }
        System.out.println(letter + " " + num + " " + space + " " + character);
    }
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String a = in.nextLine();
        sc(a);
    }
}