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I am creating a Java game where you fly a plane and save it from colliding with any obstacles, but I am facing problem with creating the Collisions and need assistance.

I am creating a Java game where you need to fly your plane, and save it from colliding with any obstacles. I have been able to do everything successfully, however the only problem I am facing is with creating Collisions.
Note: The compiler says 'Cannot find symbol' in class 'Bird' on lines 32-33.

//Fly Your Jet
import java.applet.*;
import java.awt.*;
public class Fly_Your_Jet_main extends Applet implements Runnable
{
    Thread thread = new Thread(this);
    boolean running = true;
    Player p;
    Bird b, b2, b3;
    Image dbImage;
    Graphics dbg;
    public void init()
    {
        setSize(1000,500);
        setBackground(Color.CYAN);
        p = new Player();
        b = new Bird(this);
        b2 = new Bird(900, 200, this);
        b3 = new Bird(100, 400, this);
    }
    public void start(){thread.start();}
    public void destroy(){running = false;}
    public void stop(){running = false;}
    public void run()
    {
        while(running)
        {
            repaint();
            p.update(this);
            b.update(this,p);
            b2.update(this,p);
            b3.update(this,p);
            try
            {
                Thread.sleep(20);
            }
            catch(InterruptedException e)
            {
                System.out.println("ERROR HAS OCCURRED");
            }
        }
    }
    public void update(Graphics g)
    {
        dbImage = createImage(1000, 500);
        dbg = dbImage.getGraphics();
        paint(dbg);
        g.drawImage(dbImage, 0, 0, this);
    }
    public void paint(Graphics g)
    {
        /*showStatus("Click on the ball and then press arrow keys to start playing!");
        g.setColor(Color.magenta);
        g.drawString("SAVE YOUR BALL!",170,15);*/
        p.paint(g);
        b.paint(g, this);
        b2.paint(g, this);
        b3.paint(g, this);
    }
}

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//Fly Your Jet(Cont.)
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
public class Player implements KeyListener
{
    private int x1 = 450, y1 = 300, x2 = 415, y2 = 325, x3 = 435, y3 = 370, velX = 0, velY = 0;
    public void update(Fly_Your_Jet_main mc)
    {
        mc.addKeyListener(this);
        x1+=velX;
        y1+=velY;
        x2+=velX;
        y2+=velY;
        x3+=velX;
        y3+=velY;
    }
    public void paint(Graphics g)
    {
        //JET
        //JET BODY
        g.setColor(Color.PINK);
        g.fillOval(x1,y1,10,90);
        //JET WINGS
        g.setColor(Color.LIGHT_GRAY);
        g.fillRect(x2,y2,80,20);
        g.fillRect(x3,y3,40,10);
    }
    public void keyPressed(KeyEvent e)
    {
        switch(e.getKeyCode())
        {
            case KeyEvent.VK_RIGHT:
            {
                velX = 10;
                break;
            }
            case KeyEvent.VK_LEFT:
            {
                velX = -10;
                break;
            }
            case KeyEvent.VK_UP:
            {
                velY = -10;
                break;
            }
            case KeyEvent.VK_DOWN:
            {
                velY = 10;
                break;
            }
        }
    }
    public void keyReleased(KeyEvent arg0)
    {
        
    }
    public void keyTyped(KeyEvent arg0)
    {
        
    }
    public int getX()
    {
        return x1;
    }
    public int getY()
    {
        return y1;
    }
}

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//Fly_Your_Jet(Birds)
import java.awt.*;
import java.net.URL;
public class Bird
{
    private int x = 5, y = 10,speed=10;
    private URL url;
    private Image bird;
    public Bird(Fly_Your_Jet_main mc)
    {
        url = mc.getDocumentBase();
        bird = mc.getImage(url, "Bird.jpg");
    }
    public Bird(int i, int j, Fly_Your_Jet_main mc)
    {
        url = mc.getDocumentBase();
        bird = mc.getImage(url, "Bird.jpg");
        x = i;
        y = j;
    }
    public void update(Fly_Your_Jet_main mc, Player p)
    {
        x+=speed;
        if(x<=0)
        speed = 10;
        else if(x>=mc.getWidth()-50)
        speed = -10;
        Collision(p);
    }
    private void Collision(Player p)
    {
        int PX = p.getX;//compiler says 'cannot find symbol'
        int PY = p.getY;//compiler says 'cannot find symbol'
        if(PX-32 <= x && PX+32 >= x)
        {
            System.out.println("Collision Detected!!!");
        }
    }
    public void paint(Graphics g, Fly_Your_Jet_main mc)
    {
        g.drawImage(bird,x,y,mc);
    }
}

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