计算字符个数

都转换成大写字母即可

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        String str=sc.next().toUpperCase();
        char ch=sc.next().charAt(0);
        int count=getCount(str,ch);
        System.out.print(count);
    }
    public static int getCount(String str,char ch){
        if(str.length()==0) return 0;
        int b=(int)ch;
        if(b>96) b=b-32;
        char c=(char)b;
        int count=0;
        for(int i=0;i<str.length();i++){
            if(str.charAt(i)==c) 
                count++;
        }
        return count;
    }
}