【Java】統計字符個數

package day4;
//字數統計
import java.util.Scanner;

public class StringDemo3 {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        System.out.println("請輸入一個字符串");
        String line = sc.nextLine();

//        統計三種字符個數
        int bigCount=0;
        int smallCount=0;
        int numberCount=0;

        for(int i=0;i<line.length();i++){
           char ch= line.charAt(i);
//            判斷屬於哪種類型
            if (ch>='A'&&ch<='Z'){
                bigCount++;
            }else if (ch>='a'&&ch<='z'){
                smallCount++;
            }if (ch>='0'&&ch<='9'){
                numberCount++;
            }
        }
        System.out.println("大寫個數:"+bigCount+","+"小寫個數"
                +smallCount+','+"數字個數"+numberCount);
    }
}