计算字符个数

import java.util.Scanner;
public class Main{
    public static void main(String []args){
        Scanner input = new Scanner(System.in);
        String preStr = input.nextLine();
        String subChar = input.nextLine();
        char subTemp = subChar.charAt(0);
        int count = 0;
        for(char c : preStr.toCharArray()){
            if( subTemp==c || Math.abs(subTemp - c) == 32){
                count++;
            }
        }
        System.out.println(count);
    }
}

欢迎讨论