Thread: HI, could someone please tell me why my code doesnt work?

I wanna make the circle move up, heres the code:

import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.ImageObserver;
import java.io.*;
import java.net.*;
import java.applet.AudioClip;
import javax.imageio.ImageIO;
import sun.audio.*;
 
public class Hazlo extends JFrame {
	Point point = new Point(250,250);
 
	static Rectangle right = new Rectangle(200, 200, 90, 90);
	public Hazlo()
	{
		super("Shapes");
		setSize(500,500);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setVisible(true);
 
 
 
	}
 
	public void paint(Graphics g) {
		super.paint(g);
 
		g.setColor(Color.PINK);
 
		g.fillOval(point.x, point.y, 20, 20);
 
 
 
 
	}
	public static void main(String[] args) {
		new Hazlo();
 
		class Engine extends Thread {
			int circleDirection = 2;
			int UP = 5;
			int DOWN = 5;
			Point point = new Point(250,250);
			public void run(){
				while(true){
					point.y++;
 
 
 
 
					try {
						Thread.sleep(20);
					} catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
 
 
 
					}
				}
			}
		}
 
	}

First of all if you want to use threads in main class you must run him in special class called Executorservice. or:
class My thread implements Runnable {your code} (this class must be above yout main class)
then in your main class(in static method main) you wrire something like this : Thread t = new Thresd(new My());t.start();
Second: in hazlo you make Point class and use them to change circle position. Then in your main method in thread class , you create another Point class. POint class in thread isn't invoke your circle point. They are different object.