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

  1. #1
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    Default 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();
    					}
     
     
     
    					}
    				}
    			}
    		}
     
    	}


  2. #2
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    Default Re: HI, could someone please tell me why my code doesnt work?

    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.

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