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) {

        //write your code here......
        int count=0;
        for(int i=0;i<str.length();i++){
            if(word.charAt(0)==str.charAt(i)){//因为传过来的是字符串，所以要将其转换字符再比较，字符串末尾默认添加了\0符号，所以无法直接比较
                count++;
            }
        }
        return count;

    }
}