题解 | #统计字符串中字母出现次数#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        String string = "H e l l o ! n o w c o d e r";
        Scanner scanner= new Scanner(System.in);
        String word = scanner.next();
        scanner.close();
        System.out.println(check(string, word));
    }
    public static int check(String str, String word) {
        int count = 0;
        for (int i = 0; i <str.length();i++)
        {
            if( str.charAt(i)==word.charAt(0))
            {
                count++;
            }
        }
        return count;
    }
}