Draw rectangle in java frame using Mouse Even

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

class mousedrag extends JFrame implements  MouseListener,MouseMotionListener
{
    int x,y,x1,y1;
    mousedrag()
    {
        addMouseListener(this);
        addMouseMotionListener(this);

    }

    public void mouseEntered(MouseEvent me)
    {

    }

    public void mousePressed(MouseEvent me)
    {
        x=me.getX();
        y=me.getY();

    }

    public void mouseClicked(MouseEvent me)
    {

    }


    public void mouseReleased(MouseEvent me)
    {

    }
    public void mouseMoved(MouseEvent me)

    {

    }
    public void mouseDragged(MouseEvent me)
    {
        x1=me.getX();
        y1=me.getY();
        repaint();
    }


    public void mouseExited(MouseEvent me)
    {

    }
    public void paint(Graphics g)
    {
        super.paint(g);
        g.drawRect(x,y,Math.abs(x-x1),Math.abs(y-y1));
    }

    public static void main(String args[])
    {
        mousedrag f=new mousedrag();
        f.setTitle("demo of mouse event");
        f.setSize(400,400);
        f.setVisible(true);
    }
}

demonstration of mouse event

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

class mousemove extends JFrame implements  MouseListener,MouseMotionListener
{
    int x,y,X,Y;
    mousemove()
    {
        addMouseListener(this);
        addMouseMotionListener(this);
        x=0;
        y=0;

    }

    public void mouseEntered(MouseEvent me)
    {

    }

    public void mousePressed(MouseEvent me)
    {


    }

    public void mouseClicked(MouseEvent me)
    {

    }


    public void mouseReleased(MouseEvent me)
    {

    }
    public void mouseMoved(MouseEvent me)

    {
        x=me.getX();
        y=me.getY();
        repaint();

    }
    public void mouseDragged(MouseEvent me)
    {

    }


    public void mouseExited(MouseEvent me)
    {

    }
    public void paint(Graphics g)
    {
        super.paint(g);
        g.drawString("x="+x,50,50);
        g.drawString("Y="+y,90,50);

    }

    public static void main(String args[])
    {        mousemove f=new mousemove();
        f.setTitle("demo of mouse event");
        f.setSize(400,400);
        f.setVisible(true);
    }
}