Change color of the rectangle which the mouse is in by using the mouse wheel

Question

Sorry for posting my whole code but this way you can check my problem easier, no?

package task3;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import javax.swing.*;

class Model {
    
    int l; //line
    int c; //column
    int[] loc = {0,0}; //location
    JFrame frame;
    int m_width;
    int m_height;
    int R;
    int G;
    int B;
    int count;
    int mY;
    int x, y;
    Rectangle rect;
    
    
    int genR() {
    int R = (int)(Math.random()*256);
        return R;
    }
    int genG() {
        int G = (int)(Math.random()*256); 
        return G;
    }
    int genB() {
        int B = (int)(Math.random()*256);
        return B;
    }
    
    public int getRectWidth() {
        return frame.getContentPane().getWidth() / c;
    }
    public int getRectHeight() {
        return frame.getContentPane().getHeight() / l;
    }
    
    
    Model(int width, int height, int line, int column, JFrame w) {
        m_width = width;
        m_height = height;
        l = line;
        c = column;
        frame = w;
    }
}

class Mvl extends JComponent implements MouseWheelListener {
    
    private Model m_Mod;
    
    Mvl(Model mod) {
        m_Mod = mod;
    }
    public void mouseWheelMoved(MouseWheelEvent e) {
        //m_Mod.mY += e.getWheelRotation();
        //m_Mod.mY += e.getUnitsToScroll();
        System.out.print(m_Mod.rect.getSize());
        m_Mod.frame.repaint();
        //int x = e.getXOnScreen();
        //int y = e.getYOnScreen();
        //int x = e.getX();
        //int y = e.getY();

       
         //RectangleComponent rc = new RectangleComponent(x, y);
         //m_Mod.frame.add(rc);
         //m_Mod.frame.revalidate();
    }
}

class Reactmouse implements MouseListener { //Print size of rectangle //Implement all methods otherwise abstract class
    
    private Model m_Mod;
    
    Reactmouse(Model mod) {
        m_Mod = mod;
    }
    
    public void mouseClicked(MouseEvent e) { 
        //System.out.println(++m_Mod.count + "  " + "Width: " + m_Mod.getRectWidth() + "  " + "Height: " +
        //m_Mod.getRectWidth() + " Position X-Axis: " + m_Mod.loc[0] + "Position Y-Axis: " + m_Mod.loc[1]);
        System.out.println("Position on X-Axis:" + e.getX() + " " + "Position on Y-Axis: "+  e.getY()); 
        //Cords of the click, in the rectangle
    }
    
    @Override
    public void mousePressed(MouseEvent e) {
        
    }
    @Override
    public void mouseReleased(MouseEvent e) {
            
    }
    @Override
    public void mouseEntered(MouseEvent e) {
            
    }
    @Override
    public void mouseExited(MouseEvent e) { 
        
    }
}

class View extends JComponent {
    
    private Model m_Mod;

    View(Model mod) {
        m_Mod = mod;
    }
    public void draw(Graphics g) {
        Color c = new Color(m_Mod.genR(), m_Mod.genG(), m_Mod.genB());
        g.setColor(c);
        g.fillRect(m_Mod.loc[0], m_Mod.loc[1], m_Mod.getRectWidth(), m_Mod.getRectHeight());
        m_Mod.rect = g.getClipBounds(); 
    }

Here I ask for the size's Dimension but I need the rectangle's size

    @Override
    protected void paintComponent(Graphics g) {
        
        super.paintComponent(g);
    
        for(int i=0; i<m_Mod.l; ++i) {
            for(int j=0; j<m_Mod.c; ++j) {
                
              draw(g);  
              m_Mod.loc[0] = m_Mod.loc[0] + m_Mod.getRectWidth() + 2;
              
             }
            
            m_Mod.loc[0] = 0;
            m_Mod.loc[1] = m_Mod.loc[1] + m_Mod.getRectHeight() + 2;
        }
        m_Mod.loc[1] = 0;
    }
}
class Controller extends JFrame{
    
    private Model m_Mod;
    private View m_View;
    
    
        Controller(){
                
                JFrame window = new JFrame();
                m_Mod = new Model(500,500,8,8, window);
                m_View = new View(m_Mod);
                Image icon = window.getToolkit().getImage("C:\\Users\\49157\\eclipse-workspace\\Programmierung\\src\\task3\\download.png");
                window.setIconImage(icon);
                window.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
                window.add(m_View);
                window.setSize(m_Mod.m_width,m_Mod.m_height);
                //window.add(new myButton());
                window.addMouseWheelListener(new Mvl(m_Mod));
                window.addMouseListener(new Reactmouse(m_Mod));
                window.setLocationRelativeTo(null);
                window.setVisible(true);
                window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                
        }
        void simulate(){
            m_View.repaint();
        }
        
}
public class task3 {

    public static void main(String[] args) throws Exception {
            
            Controller c = new Controller();    
            c.simulate();
            
        }
    }

Okay so I can redraw the whole frame with my mousewheel but I can not redraw single rectangles drawed here. How do I do that?

The main problem is that I cannot ask for the x and y coords of my drawed rectangles. Any ideas?