Java parse a string using a scanner, and using the parsed string as input in an if else statement

Hello fellow programmers! I am a Java beginner and I need some help.

I have a program that I want to make the Turtle move using prefabricated instructions in a string called "rule". I want that rule to be parsed into a readable format for an if-else statement. The if-else statement will then read every character in the parsed "rule", and make the Turtle move accordingly to each condition.

I have ran into some issues with the program, it parses (I think so) and displays the rule, but there is no movement from the turtle. I believe it has something to do with the if-else statement. Please help!

import java.awt.*;
import java.util.Scanner;

class FractalEngine
{

    World worldObj = new World();
    Turtle m = new Turtle(200, 200, worldObj);
    Scanner in = new Scanner(System.in);

    FractalEngine()
    {

        //String rule = "F-F+F+F-FQ";
        String rule = "F-F+F+F-F-F-F+F+F-F+F-F+F+F-F+F-F+F+F-F-F-F+F+F-FQ"; 
        //String rule = "F-F+F+F-F-F-F+F+F-F+F-F+F+F-F+F-F+F+F-F-F-F+F+F-F-F-F+F+F-F-F-F+F+F-F+F-F+F+F-F+F-F+F+F-F-F-F+F+F-F+F-F+F+F-F-F-F+F+F-F+F-F+F+F-F+F-F+F+F-F-F-F+F+F-F+F-F+F+F-F-F-F+F+F-F+F-F+F+F-F+F-F+F+F-F-F-F+F+F-F-F-F+F+F-F-F-F+F+F-F+F-F+F+F-F+F-F+F+F-F-F-F+F+F-FQ";

        m.setHeading(0);

        Scanner scanner = new Scanner(rule);
        System.out.println();
        System.out.println("Fractal Rule: ");
        System.out.println(scanner.nextLine()); 
        System.out.println();

        // it prints it to the terminal, but no Turtle movement. Am I using the right parsing method?

        do
        {
            Scanner scanRule = new Scanner(rule);
            scanRule.nextLine();

            if(rule.equalsIgnoreCase("F"))
                m.forward(25);
            else if(rule.equals("-"))
                m.turnLeft();
            else if(rule.equals("+"))
                m.turnRight();
            else
                rule = "Q";       

        }
        while(!rule.equalsIgnoreCase("Q"));

        System.out.println("Fractal construction terminated.");

    }   
}

public class FractalConstructor
{
public static void main(String[] args)
{

    FractalEngine fe = new FractalEngine();

}
}