【无标题】统计字符次数

import java.util.Scanner;

public class kk {
    public static void main(String[] args) {
           Scanner sc = new Scanner(System.in);
           System.out.println("请输入一个字符串：");
           String line=sc.nextLine();

           int bigCount=0;
           int smallCount=0;
           int numberCount=0;

           for(int i=0;i<line.length();i++){
               int ch=line.charAt(i);

               if(ch>='A' && ch<='Z'){
                   bigCount++;
               }
               else if(ch>='a' && ch<='z'){
                   smallCount++;
               }
               else if (ch>='0' && ch<='9'){
                   numberCount++;
               }
           }
        System.out.println("大写字母："+bigCount+"个");
        System.out.println("小写字母："+smallCount+"个");
        System.out.println("数字："+numberCount+"个");
    }
}