输入一个长度不超过30的字符串然后再输入一个字符输出该字符在字符串中出现的次数

import java.util.*;
public class Main {
    public static void main(String[] args) {
        // TODO code application logic here
        Scanner shuru=new Scanner(System.in);
        String shen;
        shen=shuru.nextLine();
        char [] a;
        a = shen.toCharArray();
        char x;
        int y=0;
        x = shuru.next().charAt(0);
        for(int i=0;i