StringFreq.java

package Collection;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class StringFreq{
    public static void main(String[] args) throws IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        System.out.println("Enter Your String");
        String str = br.readLine();
        System.out.println("Input String is " + str);

        int tempA = 0;
        int tempB = 0;

        for (int i = 0; i < str.length(); i++) {
            char ch = str.charAt(i);
            if (ch == 'A') {
                tempA++;
            } else if (ch == 'I') {
               tempB++;
            }
        }


        System.out.println("Frequency of 'A': " + tempA);

        System.out.println("Frequency of 'I': " + tempB);
      System.out.println("The End");

    }
}