javaswinggame-development
My background image isn't displaying in my pong game I made
My background image is failing to load in my pong game I created with Java. This is my GamePanel.java file where I believe the error is coming from.
Broken code
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.ImageIcon;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Color;
import java.awt.Font;
import java.awt.Stroke;
import java.awt.BasicStroke;
import java.awt.Graphics2D;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;
import java.net.URL;
public class GamePanel extends JPanel implements ActionListener, KeyListener {
static final int GAME_WIDTH = 800;
static final int GAME_HEIGHT = 600;
static final int BALL_DIAMETER = 20;
static final int PADDLE_WIDTH = 10;
static final int PADDLE_HEIGHT = 100;
Paddle player1;
Paddle player2;
Ball ball;
Timer timer;
int player1Score = 0;
int player2Score = 0;
boolean playState = true;
private Image backgroundImage;
private SoundEffect scoreSound; // Declaration of the SoundEffect object
public GamePanel() {
player1 = new Paddle(0, (GAME_HEIGHT / 2) - (PADDLE_HEIGHT / 2), PADDLE_WIDTH, PADDLE_HEIGHT, 1);
player2 = new Paddle(GAME_WIDTH - PADDLE_WIDTH, (GAME_HEIGHT / 2) - (PADDLE_HEIGHT / 2), PADDLE_WIDTH, PADDLE_HEIGHT, 2);
ball = new Ball((GAME_WIDTH / 2) - (BALL_DIAMETER / 2), (GAME_HEIGHT / 2) - (BALL_DIAMETER / 2), BALL_DIAMETER, BALL_DIAMETER);
loadImage();
scoreSound = new SoundEffect("/sounds/score.wav"); // Initialize the sound effect
this.setFocusable(true);
this.addKeyListener(this);
this.setPreferredSize(new java.awt.Dimension(GAME_WIDTH, GAME_HEIGHT));
timer = new Timer(10, this);
timer.start();
}
private void loadImage() {
// Example path that assumes the 'images' folder is directly in the project root directory
String path = "/images/backgroundImage.png"; // Adjust this path as needed
URL url = getClass().getClassLoader().getResource(path);
if (url == null) {
System.err.println("Failed to load background image: " + path);
return;
}
ImageIcon ii = new ImageIcon(url);
backgroundImage = ii.getImage();
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (backgroundImage != null) {
g.drawImage(backgroundImage, 800, 600, this.getWidth(), this.getHeight(), this); // Draw the background full-size
}
drawScoreboard(g);
drawCenterLine(g);
player1.draw(g);
player2.draw(g);
ball.draw(g);
}
public void scoreUpdate(int player) {
if (player == 1) {
player1Score++; // Correctly increment player1's score
} else if (player == 2) {
player2Score++; // Correctly increment player2's score
}
scoreSound.play(); // Play sound on scoring
}
public void actionPerformed(ActionEvent e) {
if (playState) {
player1.move();
player2.move();
ball.move();
}
checkCollision();
repaint();
}
public void checkCollision() {
// Ball bounces off top & bottom window edges
if (ball.y <= 0 || ball.y >= GAME_HEIGHT - ball.height) {
ball.setYDirection(-ball.yVelocity);
}
// Ball bounces off paddles
if (ball.intersects(player1) || ball.intersects(player2)) {
ball.setXDirection(-ball.xVelocity);
}
// Ball goes out of bounds
if (ball.x <= 0) {
scoreUpdate(2);
playState = false;
newPaddles();
newBall();
ball.stop();
} else if (ball.x >= GAME_WIDTH - ball.width) {
scoreUpdate(1);
playState = false;
newPaddles();
newBall();
ball.stop();
}
}
public void newPaddles() {
player1.y = (GAME_HEIGHT / 2) - (PADDLE_HEIGHT / 2);
player2.y = (GAME_HEIGHT / 2) - (PADDLE_HEIGHT / 2);
}
public void newBall() {
ball.x = (GAME_WIDTH / 2) - (BALL_DIAMETER / 2);
ball.y = (GAME_HEIGHT / 2) - (BALL_DIAMETER / 2);
}
private void drawScoreboard(Graphics g) {
g.setColor(Color.WHITE);
g.setFont(new Font("Consolas", Font.BOLD, 60));
g.drawString(String.valueOf(player1Score), (GAME_WIDTH / 4), 50);
g.drawString(String.valueOf(player2Score), (GAME_WIDTH / 4) * 3, 50);
}
private void drawCenterLine(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
Stroke dashed = new BasicStroke(3, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0, new float[]{10}, 0);
g2d.setStroke(dashed);
g2d.setColor(Color.WHITE);
g2d.drawLine(GAME_WIDTH / 2, 0, GAME_WIDTH / 2, GAME_HEIGHT);
}
public void keyPressed(KeyEvent e) {
player1.keyPressed(e);
player2.keyPressed(e);
if (e.getKeyCode() == KeyEvent.VK_SPACE && !playState) {
playState = true; // Start moving the ball again
int direction = (player1Score + player2Score) % 2 == 0 ? 1 : -1;
ball.start(direction); // Serve the ball towards the last scorer
}
}
public void keyReleased(KeyEvent e) {
player1.keyReleased(e);
player2.keyReleased(e);
}
public void keyTyped(KeyEvent e) {}
}
working code
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Stroke;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JPanel;
import javax.swing.Timer;
public class GamePanel extends JPanel implements ActionListener, KeyListener {
static final int GAME_WIDTH = 800;
static final int GAME_HEIGHT = 600;
static final int BALL_DIAMETER = 20;
static final int PADDLE_WIDTH = 10;
static final int PADDLE_HEIGHT = 100;
Paddle player1;
Paddle player2;
Ball ball;
Timer timer;
int player1Score = 0;
int player2Score = 0;
boolean playState = true;
private Image backgroundImage;
private SoundEffect scoreSound; // Declaration of the SoundEffect object
public GamePanel() {
player1 = new Paddle(0, (GAME_HEIGHT / 2) - (PADDLE_HEIGHT / 2), PADDLE_WIDTH, PADDLE_HEIGHT, 1);
player2 = new Paddle(GAME_WIDTH - PADDLE_WIDTH, (GAME_HEIGHT / 2) - (PADDLE_HEIGHT / 2), PADDLE_WIDTH, PADDLE_HEIGHT, 2);
ball = new Ball((GAME_WIDTH / 2) - (BALL_DIAMETER / 2), (GAME_HEIGHT / 2) - (BALL_DIAMETER / 2), BALL_DIAMETER, BALL_DIAMETER);
loadImage();
scoreSound = new SoundEffect("/sounds/score.wav"); // Initialize the sound effect
this.setFocusable(true);
this.addKeyListener(this);
this.setPreferredSize(new java.awt.Dimension(GAME_WIDTH, GAME_HEIGHT));
timer = new Timer(10, this);
timer.start();
}
private void loadImage() {
String filePath = "images/br.jpg"; // Relative path from the current working directory
File file = new File(filePath);
try {
backgroundImage = ImageIO.read(file);
if (backgroundImage != null) {
System.out.println("Image loaded successfully: Width = " + backgroundImage.getWidth(null) + ", Height = " + backgroundImage.getHeight(null));
} else {
System.err.println("Failed to load the image.");
}
} catch (IOException e) {
System.err.println("Exception while loading the image: " + e.getMessage());
System.err.println("Failed to load image from path: " + filePath);
}
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
// Draw the background image if it's loaded, otherwise draw a black background
if (backgroundImage != null) {
g.drawImage(backgroundImage, 0, 0, this.getWidth(), this.getHeight(), this);
} else {
g.setColor(Color.BLACK);
g.fillRect(0, 0, this.getWidth(), this.getHeight());
}
drawScoreboard(g);
drawCenterLine(g);
player1.draw(g);
player2.draw(g);
ball.draw(g);
}
public void scoreUpdate(int player) {
if (player == 1) {
player1Score++; // Correctly increment player1's score
} else if (player == 2) {
player2Score++; // Correctly increment player2's score
}
scoreSound.play(); // Play sound on scoring
}
public void actionPerformed(ActionEvent e) {
if (playState) {
player1.move();
player2.move();
ball.move();
}
checkCollision();
repaint();
}
public void checkCollision() {
// Ball bounces off top & bottom window edges
if (ball.y <= 0 || ball.y >= GAME_HEIGHT - ball.height) {
ball.setYDirection(-ball.yVelocity);
}
// Ball bounces off paddles
if (ball.intersects(player1) || ball.intersects(player2)) {
ball.setXDirection(-ball.xVelocity);
}
// Ball goes out of bounds
if (ball.x <= 0) {
scoreUpdate(2);
playState = false;
newPaddles();
newBall();
ball.stop();
} else if (ball.x >= GAME_WIDTH - ball.width) {
scoreUpdate(1);
playState = false;
newPaddles();
newBall();
ball.stop();
}
}
public void newPaddles() {
player1.y = (GAME_HEIGHT / 2) - (PADDLE_HEIGHT / 2);
player2.y = (GAME_HEIGHT / 2) - (PADDLE_HEIGHT / 2);
}
public void newBall() {
ball.x = (GAME_WIDTH / 2) - (BALL_DIAMETER / 2);
ball.y = (GAME_HEIGHT / 2) - (BALL_DIAMETER / 2);
}
private void drawScoreboard(Graphics g) {
g.setColor(Color.WHITE);
g.setFont(new Font("Consolas", Font.BOLD, 60));
g.drawString(String.valueOf(player1Score), (GAME_WIDTH / 4), 50);
g.drawString(String.valueOf(player2Score), (GAME_WIDTH / 4) * 3, 50);
}
private void drawCenterLine(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
Stroke dashed = new BasicStroke(3, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0, new float[]{10}, 0);
g2d.setStroke(dashed);
g2d.setColor(Color.WHITE);
g2d.drawLine(GAME_WIDTH / 2, 0, GAME_WIDTH / 2, GAME_HEIGHT);
}
public void keyPressed(KeyEvent e) {
player1.keyPressed(e);
player2.keyPressed(e);
if (e.getKeyCode() == KeyEvent.VK_SPACE && !playState) {
playState = true; // Start moving the ball again
int direction = (player1Score + player2Score) % 2 == 0 ? 1 : -1;
ball.start(direction); // Serve the ball towards the last scorer
}
}
public void keyReleased(KeyEvent e) {
player1.keyReleased(e);
player2.keyReleased(e);
}
public void keyTyped(KeyEvent e) {}
}
My file format:
I tried renaming files and changing the naming conventions to make sure everything was the same. I have tried different png files to see if there was some issue with the png file i was using. I have even consulted AI with this problem and haven't come up with any better results.
What the game looks like and what it should look like with the proper background image.
EDIT: The problem has been resolved here is the working code, I will leave it here as a reference in case anyone else encounters a similar problem.
Solution
This seems wrong. The x, y coordinates here are going to be pretty far away from the center or the edge of the frame:
g.drawImage(backgroundImage, 800, 600, this.getWidth(),
this.getHeight(), this);
Trying drawing at 0,0 rather that 800,600 just to see if that fixes the problem.
EDIT: this worked when I tried it. There might be a problem you aren't showing us. Full code:
/*
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
* Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
*/
package overflow21;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Stroke;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.net.URL;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
/**
*
* @author Brenden
*/
public class GamePanel extends JPanel implements ActionListener, KeyListener {
static final int GAME_WIDTH = 800;
static final int GAME_HEIGHT = 600;
static final int BALL_DIAMETER = 20;
static final int PADDLE_WIDTH = 10;
static final int PADDLE_HEIGHT = 100;
// Paddle player1;
// Paddle player2;
// Ball ball;
Timer timer;
int player1Score = 0;
int player2Score = 0;
boolean playState = true;
private Image backgroundImage;
// private SoundEffect scoreSound; // Declaration of the SoundEffect object
public static void main( String[] args ) {
SwingUtilities.invokeLater( GamePanel::start );
}
private static void start() {
JFrame frame = new JFrame( "Game Panel");
GamePanel game = new GamePanel();
frame.add( game );
frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
frame.pack();
frame.setLocationRelativeTo( null );
frame.setVisible( true );
}
public GamePanel() {
// player1 = new Paddle(0, (GAME_HEIGHT / 2) - (PADDLE_HEIGHT / 2), PADDLE_WIDTH, PADDLE_HEIGHT, 1);
// player2 = new Paddle(GAME_WIDTH - PADDLE_WIDTH, (GAME_HEIGHT / 2) - (PADDLE_HEIGHT / 2), PADDLE_WIDTH, PADDLE_HEIGHT, 2);
// ball = new Ball((GAME_WIDTH / 2) - (BALL_DIAMETER / 2), (GAME_HEIGHT / 2) - (BALL_DIAMETER / 2), BALL_DIAMETER, BALL_DIAMETER);
loadImage();
// scoreSound = new SoundEffect("/sounds/score.wav"); // Initialize the sound effect
this.setFocusable(true);
this.addKeyListener(this);
this.setPreferredSize(new java.awt.Dimension(GAME_WIDTH, GAME_HEIGHT));
timer = new Timer(10, this);
timer.start();
}
private void loadImage() {
// Example path that assumes the 'images' folder is directly in the project root directory
System.err.println( "Loading..." );
String path = "overflow21/images/mountains.jpg"; // Adjust this path as needed
URL url = getClass().getClassLoader().getResource(path);
if (url == null) {
System.err.println("Failed to load background image: " + path);
return;
}
ImageIcon ii = new ImageIcon(url);
System.err.println( ii );
backgroundImage = ii.getImage();
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (backgroundImage != null) {
g.drawImage(backgroundImage, 0, 0, this.getWidth(), this.getHeight(), null ); // Draw the background full-size
}
drawScoreboard(g);
drawCenterLine(g);
// player1.draw(g);
// player2.draw(g);
// ball.draw(g);
}
public void scoreUpdate(int player) {
if (player == 1) {
player1Score++; // Correctly increment player1's score
} else if (player == 2) {
player2Score++; // Correctly increment player2's score
}
// scoreSound.play(); // Play sound on scoring
}
public void actionPerformed(ActionEvent e) {
if (playState) {
// player1.move();
// player2.move();
// ball.move();
}
checkCollision();
repaint();
}
public void checkCollision() {
// // Ball bounces off top & bottom window edges
// if (ball.y <= 0 || ball.y >= GAME_HEIGHT - ball.height) {
// ball.setYDirection(-ball.yVelocity);
// }
//
// // Ball bounces off paddles
// if (ball.intersects(player1) || ball.intersects(player2)) {
// ball.setXDirection(-ball.xVelocity);
// }
//
// // Ball goes out of bounds
// if (ball.x <= 0) {
// scoreUpdate(2);
// playState = false;
// newPaddles();
// newBall();
// ball.stop();
// } else if (ball.x >= GAME_WIDTH - ball.width) {
// scoreUpdate(1);
// playState = false;
// newPaddles();
// newBall();
// ball.stop();
// }
}
public void newPaddles() {
// player1.y = (GAME_HEIGHT / 2) - (PADDLE_HEIGHT / 2);
// player2.y = (GAME_HEIGHT / 2) - (PADDLE_HEIGHT / 2);
}
public void newBall() {
// ball.x = (GAME_WIDTH / 2) - (BALL_DIAMETER / 2);
// ball.y = (GAME_HEIGHT / 2) - (BALL_DIAMETER / 2);
}
private void drawScoreboard(Graphics g) {
g.setColor(Color.WHITE);
g.setFont(new Font("Consolas", Font.BOLD, 60));
g.drawString(String.valueOf(player1Score), (GAME_WIDTH / 4), 50);
g.drawString(String.valueOf(player2Score), (GAME_WIDTH / 4) * 3, 50);
}
private void drawCenterLine(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
Stroke dashed = new BasicStroke(3, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0, new float[]{10}, 0);
g2d.setStroke(dashed);
g2d.setColor(Color.WHITE);
g2d.drawLine(GAME_WIDTH / 2, 0, GAME_WIDTH / 2, GAME_HEIGHT);
}
public void keyPressed(KeyEvent e) {
// player1.keyPressed(e);
// player2.keyPressed(e);
if (e.getKeyCode() == KeyEvent.VK_SPACE && !playState) {
playState = true; // Start moving the ball again
int direction = (player1Score + player2Score) % 2 == 0 ? 1 : -1;
// ball.start(direction); // Serve the ball towards the last scorer
}
}
public void keyReleased(KeyEvent e) {
// player1.keyReleased(e);
// player2.keyReleased(e);
}
public void keyTyped(KeyEvent e) {}
}
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