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Thread: Fixing of bug for Pong game

  1. #1
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    Default Fixing of bug for Pong game

    Hello everyone,
    I am new to this forum. I hope, i will contribute more as time passes.
    I attached the program below. Everything seems fine but the program doesn't start working.
    Any kind of contribution would be appreciated.
    Thanks in advance.
    Attached Files Attached Files
    Last edited by Deep_4; November 8th, 2012 at 01:20 PM.


  2. #2
    mmm.. coffee JavaPF's Avatar
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    Default Re: The bug in the Pong game

    Hello phoenix. Welcome to the Java Programming Forums.

    How are you attempting to run this?
    Please use [highlight=Java] code [/highlight] tags when posting your code.
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  3. #3
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    Default Re: The bug in the Pong game

    I build classes, then run pong.java and it doesnt show the frame.However, when you change 49.line to false in Pong class,
    it shows the frame but doesnt run.

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    Default Re: The bug in the Pong game

    Isn't there anyone who can help me? It is kind of urgent.

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    Default Re: The bug in the Pong game

    Quote Originally Posted by phoenix View Post
    I build classes, then run pong.java and it doesnt show the frame.However, when you change 49.line to false in Pong class,
    it shows the frame but doesnt run.
    OK yes i'm having the same problem. I'll have a play with it shortly and see if I can make it do something!
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    Default Re: The bug in the Pong game

    Thank you for your attention

  7. #7
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    Default Re: The bug in the Pong game

    Hmm I'm having trouble getting this to run properly..
    I will continue to look at it but seeing as your in a rush, i'll let you know now that I don't have much time.

    If you need to see a working pong game, try these links:

    A Pong Game by Dino Scarcella

    Java Pong Game

    I have compiled the second one before and know it works.
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  8. The Following User Says Thank You to JavaPF For This Useful Post:

    phoenix (July 14th, 2009)

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    Default Re: The bug in the Pong game

    You are a lifesaver. Thank you billion times.

  10. #9
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    Default Re: The bug in the Pong game

    You still need to get the original game you posted working?
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    Default Re: The bug in the Pong game

    Unfortunately, yes.

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    Default Re: The bug in the Pong game

    A man from another forum solved the problem.
    Here it is;
    "I moved the code in the main() method to the frame's constructor. It works now. Also, when extending components, be sure to call the super() constructor."
    import java.io.*;
    import java.awt.*;
    import javax.swing.*;
     
    public class Pong extends JFrame implements Runnable
    {
    	//Variables
    	Thread pongThread; //Will be used to turn this runnable object into a working thread
    	PongArena arena = new PongArena(400, 600); //Make a pong arena
     
    	//Constructors
    	public Pong()
    	{
    		super();
    		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Tell it to close the program when the frame closes
    		//Setup the layout and how things will be displayed...
    		Container content = this.getContentPane();
    		content.setLayout(new BorderLayout());
    		content.add(arena, BorderLayout.CENTER);
    		this.setTitle("Pong - By: Chris Canik");
    		this.setResizable(false);
     
    		//This tells the JFrame that it should resize according
    		//to the component's (PongArena) prefered size
    		this.pack();
     
    		//The boundaries must be created here because getX and getY have no
    		//accurate values when the arena's constructor is originally called
    		arena.side1 = new PongArenaBoundary((int)(arena.getX() - 500),
    											(int)(arena.getY() + arena.topPaddle.getHeight() + 30),
    											(int)(500),
    											(int)(arena.getBounds().getHeight() - arena.topPaddle.getHeight() - arena.bottomPaddle.getHeight() - 60));
    		arena.side2 = new PongArenaBoundary((int)(arena.getX() + arena.getBounds().getWidth()),
    											(int)(arena.getY() + arena.topPaddle.getHeight() + 30),
    											(int)(arena.getX() + arena.getBounds().getWidth() + 500),
    											(int)(arena.getBounds().getHeight() - arena.topPaddle.getHeight() - arena.bottomPaddle.getHeight() - 60));
     
    		//Give the arena focus within the JPanel
    		arena.requestFocus();
     
    		setVisible(true); //Show the frame to the player
     
    		//Turn this Runnable JPanel into an actual thread
    		pongThread = new Thread(this);
    		pongThread.start();
    	}
     
    	//Methods
    	public void run()
    	{
    		boolean keepGoing = true; //Tracks whether there has not been an error
     
    		while (keepGoing)
    		{
    			try
    			{
    				//Find out what the ball needs to bounce off of and do it
    				arena.ball.bounce(arena.ball.needToBounce(arena));
     
    			}
    			catch (BallOffCourtException ex) //Point has been scored
    			{
    				//Make a new ball for a new round, and register it to
    				//the two AI's so they don't try to follow the old one
    				arena.topAI.registerBall(arena.newBall((arena.getWidth() / 2) - 10, (arena.getHeight() / 2) - 10, 20, 20));
    				arena.bottomAI.registerBall(arena.ball);
     
    			}
     
    			//Display FPS in JPanel title
    			this.setTitle("Pong (FPS: " + arena.fps.getFrames() + ") - By: Chris Canik");
     
    			try
    			{
    				//Redraw everything and wait a bit as math is handled
    				repaint();
    				Thread.sleep(10); //(1000/10) = 100FPS
    			}
    			catch (InterruptedException ex)
    			{
    				//Error...  Time to stop running!
    				System.out.println("Interrupted!");
    				keepGoing = false;
    			}
    	}
    	}
     
    	//Main Method
    	public static void main(String[] args)
    	{
    		Pong pongGame = new Pong(); //Lets make a game frame
    	}
     
    }

  13. #12
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    Default Re: The bug in the Pong game

    Brilliant! Glad it was solved for you phoenix. Thanks for posting the solution.
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