获取你所拥有的宝石的数量

import java.util.Scanner;

public class 宝石 {
    public static void main(String[] args) {
        m1();
    }

    public static void m1() {
//        你想知道你拥有的石头中有多少是宝石。
        Scanner scanner = new Scanner(System.in);
        System.out.println("输入宝石的类型");
        String bs = scanner.next();
        System.out.println("输入你所拥有的宝石");
        String ihava = scanner.next();

        char[] arr1 = bs.toCharArray();//转成char数组
        char[] arr2 = ihava.toCharArray();//转成char数组
        int c = 0;//定义接收值
        for (int i = 0; i < arr1.length; i++) {//遍历arr1
            char a = arr1[i];
            for (int j = 0; j < arr2.length; j++) {//遍历arr2
                char b = arr2[j];
                if (a == b) {
                    c++;
                }
            }
        }
        System.out.println(c);
    }