计算字符个数

写出一个程序，接受一个有字母和数字以及空格组成的字符串，和一个字符，然后输出输入字符串中含有该字符的个数。不区分大小写。

import java.util.Scanner;

 

class Main {

    public static void main (String[] args) {

        Scanner s = new Scanner(System.in);

        String st = null;

        char c = ' ';

        int count = 0;

        while (s.hasNext()) {

            st = s.next();

            c = s.next().charAt(0);

        }

        for (int i = 0; i < st.length(); i ++) {

            if (st.charAt(i) == c) {

                count ++;

            }

        }

        System.out.println(count);

    }

}

 

 

 

import java.util.*;

public class Main {

 

    /**

     * @param args

     */

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        Scanner in = new Scanner(System.in);

        while (in.hasNext()) {

            String str1 = in.next();

            String str2=in.next();

            int cnt=0;

            for(int i=0;i<str1.length();i++)

            {

                if (str1.charAt(i)==str2.charAt(0)) {

                    cnt++;

                }

            }

            System.out.println(cnt);

        }

        in.close();

    }

 

}