题解 | #统计字符串中字母出现次数#

public class outtimes {

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) {

    return str.length() - str.replace(word, "").length();
}

}