This is a follow-up to my previous question. I've simplified things as much as I could, and it still doesn't work! Although the good thing I got around using getGraphics().

A detailed explanation on what goes wrong here is massively appreciated. My suspicion is that something's wrong with the the way I used addMouseListener() method here.

import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class MainClass1{
    private static PaintClass22 inst2 = new PaintClass22();

public static void main(String args[]){
        JFrame frame1 = new JFrame();
        frame1.add(inst2);
        frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame1.setTitle("NewPaintToolbox");
        frame1.setSize(200, 200);
        frame1.setLocationRelativeTo(null);     
        frame1.setVisible(true);                
    }

}

class PaintClass11 extends MouseAdapter{

    int xvar;
    int yvar;
    static PaintClass22 inst1 = new PaintClass22();

    public PaintClass11(){
        inst1.addMouseListener(this);
        inst1.addMouseMotionListener(this);

    }   

    @Override
    public void mouseClicked(MouseEvent arg0) {
        // TODO Auto-generated method stub
        xvar = arg0.getX();
        yvar = arg0.getY();
        inst1.return_paint(xvar, yvar);

    }   

}

class PaintClass22 extends JPanel{

    private static int varx;
    private static int vary;    

    public void return_paint(int input1, int input2){

        varx = input1;
        vary = input2;
        repaint(varx,vary,10,10);


    }

    public void paintComponent(Graphics g){

        super.paintComponents(g);
        g.setColor(Color.RED);
        g.fillRect(varx, vary, 10, 10);     

    }

}