统计字符串中每种字符类型的个数demo

/*
 * 统计字符串中每中字符类型的个数，思路：
 * 1、键盘录入一个字符串
 * 2、获取到每个字符，遍历字符串
 * for (int i = 0; i < s.length(); i++) {
            char ch = s.charAt(i);
 * 3、判断每个字符属于哪种类型，对应的个数++
 */


package cn.string;

import java.util.Scanner;

public class TongJi {
    public static void main(String[] args) {
        int daxienumber = 0;
        int xiaoxienumber = 0;
        int intnumber = 0;
        Scanner sc = new Scanner(System.in);
        System.out.println("请属于一个字符串");
        String s = sc.nextLine();
        for (int i = 0; i < s.length(); i++) {
            char ch = s.charAt(i);
            System.out.println(ch);
            if (ch >= 'A' && ch <='Z') {
                daxienumber ++ ;
            }
            if (ch >= 'a' && ch <='z') {
                xiaoxienumber ++;
            }
            if (ch >= '0' && ch <='9') {
                intnumber ++;
            }
            
        }
        System.out.println("daxienumber:"+daxienumber);
        System.out.println("xiaoxienumber:"+xiaoxienumber);
        System.out.println("intnumber:"+intnumber);
    }

}