TQC+ JAVA

JPA04.java

import java.util.Scanner;
public class JPA03 {
    static Scanner keyboard = new Scanner(System.in);
    public static void main(String[] args) {
		System.out.print("Input a string: ");
		String str = keyboard.nextLine();
		System.out.println(str + " has " + strR(str) + " As");

		System.out.print("Input a string: ");
		str = keyboard.nextLine();
		System.out.println(str + " has " + strR(str) + " As");
    }
	public static int strR(String str) {
		if(str.equals("")) {
			return 0;
		}
		if(str.substring(0, 1).equals("A")) {
			return 1 + strR(str.substring(1));
		}
		return strR(str.substring(1));
	}
}