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) {

      	// 使用字符数组外加foreach遍历一遍后得到结果
        //write your code here......
        char[] ch = str.toCharArray();
        int counts = 0;
        for (char c : ch) if (Character.toString(c).equals(word)) counts++;
        return counts;
        
    }
}