Thread: Fixing of bug for 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.

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

Thank you for your attention

You are a lifesaver. Thank you billion times.

Unfortunately, yes.

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
	}
 
}