moving an arrow from cell to cell inside a grid using a command

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Java

Hi guys

I've gave created an arrow in a grid and set its position to a specific cell in my grid, now the problem is, I cannot move it. I need to move it to the left, right and forward depending if the cell is shaded or not.
The movement control language is made up of three commands: Ln, Rn and Fn.,
Ln means turn the arrow left (anticlockwise) through n positions, where n is an integer (whole number).
Rn means turn the arrow right (clockwise) through n positions, where n is an integer (whole number).
Fn means move the arrow forward through n positions, where n is an integer (whole number).
A sample command might be R2F3L2F1R2F4.
i have included the code i have so far but don't know the code to make the arrow to move, please help:

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.Random;

public class Grid extends JFrame {

  
    GridLayout grid = new GridLayout(5, 5, 5, 5);

    static JTextField[][] textFields = new JTextField[5][5]; // Array of Object
    JTextField aTxtField = new JTextField();
    JPanel gridPanel = new JPanel();
    JPanel inputPanel = new JPanel();
    int size; // size of board (i.e. number of rows and columns )


    public Grid() {
        initializeUI();
    }

    private void initializeUI() {
        setTitle("Grid Arrow Assignment");
        setSize(300, 370);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setResizable(false);
        setVisible(true);


        this.size = textFields.length;


        for (int row = 0; row < textFields.length; row++) {
            int randomNum = 0;
            Random rand = new Random();
            randomNum = rand.nextInt(size);

            for (int col = 0; col < textFields[row].length; col++) {
                textFields[row][col] = new JTextField(); // reflects the field coordinates
                if (row == 0 && col == 0) {
                    textFields[row][col].setBackground(Color.PINK);
                }

                if (row == (textFields.length - 1) && col == (textFields.length - 1)) {
                    textFields[row][col].setBackground(Color.YELLOW);
                    textFields[row][col].setText("\u2191");

                }

                if (row == 0 && randomNum == 0) {
                    randomNum++;
                }
                if (row == (textFields.length - 1) && randomNum == (textFields.length - 1)) {
                    randomNum--;
                }

                if (col == randomNum) {
                    textFields[row][col].setBackground(Color.BLACK);
                }

               
                textFields[row][col].setHorizontalAlignment(SwingConstants.CENTER);

                gridPanel.add(textFields[row][col]);
              
            }
        }

     
        JLabel aLabel = new JLabel("Type a command:");
        aTxtField.setPreferredSize(new Dimension(150, 25));
        JButton aButton = new JButton("Go");

        inputPanel.setLayout(new GridLayout(1, 1, 1, 1));
        inputPanel.setPreferredSize(new Dimension(300, 35));
        inputPanel.add(aLabel);
        inputPanel.add(aTxtField);
        inputPanel.add(aButton);
        aButton.addActionListener(aButtonListener);
        inputPanel.setLayout(new FlowLayout());
        // inputPanel.setBackground(Color.RED);

        gridPanel.setLayout(grid);
        gridPanel.setPreferredSize(new Dimension(300, 300));
        add(gridPanel, BorderLayout.NORTH);
        add(new JSeparator(), BorderLayout.CENTER);
        add(inputPanel, BorderLayout.SOUTH);

    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new Grid();
            }
        });

    }
    ActionListener aButtonListener = new ActionListener() {

        @Override
        public void actionPerformed(ActionEvent e) {
            String userText = aTxtField.getText();

        }
    };// END

}