Sou novato e estou começando a criar meu primeiro jogo,mas quando adiciono os botões para controlar a personagem da erro, alguém pode ajudar?? o erro é o que vem logo abaixo, vou postar o código da classe principal, se precisar das outras classes mando também, tem a classe player e entidade
Exception in thread “AWT-EventQueue-0” java.lang.NullPointerException: Cannot assign field “right” because “this.player” is null
at com.TenebrisGames.main.Game.keyPressed(Game.java:148)
at java.desktop/java.awt.Component.processKeyEvent(Component.java:6572)
at java.desktop/java.awt.Component.processEvent(Component.java:6391)
at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4990)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4822)
at java.desktop/java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1950)
at java.desktop/java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:870)
at java.desktop/java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1139)
at java.desktop/java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:1009)
at java.desktop/java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:835)
at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4871)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4822)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:772)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:743)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
package com.TenebrisGames.main;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.image.BufferStrategy;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import com.TenebrisGames.entities.Entity;
import com.TenebrisGames.entities.Player;
import com.TenebrisGames.graphics.Spritesheet;
public class Game extends Canvas implements Runnable, KeyListener {
private static final long serialVersionUID = 1L;
public static JFrame frame;
private Thread thread;
private boolean isRunning = true;
private final int WIDTH = 700;
private final int HEIGHT = 400;
private final int SCALE = 2;
private BufferedImage image;
public List<Entity> entities;
public Spritesheet character;
private Player player;
public Game() {
addKeyListener(this);
setPreferredSize(new Dimension(WIDTH*SCALE,HEIGHT*SCALE));
initFrame();
//Incializando objetos
image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
entities = new ArrayList<Entity>();
character = new Spritesheet("/character.png");
Player player = new Player(0, 0, 57, 57, character.getSprite(0, 0, 57, 57));
entities.add(player);
}
public void initFrame() {
frame = new JFrame("Stolen my barbecue");
frame.add(this);
frame.setResizable(false);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public synchronized void start() {
thread = new Thread(this);
isRunning = true;
thread.start();
}
public synchronized void stop() {
isRunning = false;
try {
thread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
Game game = new Game();
game.start();
}
public void tick() {
for(int i = 0; i < entities.size(); i++) {
Entity e = entities.get(i);
e.tick();
}
}
public void render() {
BufferStrategy bs = this.getBufferStrategy();
if(bs == null) {
this.createBufferStrategy(3);
return;
}
Graphics g = image.getGraphics();
g.setColor(new Color(19,19,19));
g.fillRect(0, 0, WIDTH, HEIGHT);
/*rendereização do jogo*/
//Graphics2D g2 = (Graphics2D) g;
for(int i = 0; i < entities.size(); i++) {
Entity e = entities.get(i);
e.render(g);
}
/***/
g.dispose();
g = bs.getDrawGraphics();
g.drawImage(image, 0, 0, WIDTH*SCALE, HEIGHT*SCALE, null);
bs.show();
}
public void run() {
long lastTime = System.nanoTime();
double amountOfTicks = 60.0;
double ns = 1000000000 / amountOfTicks;
double delta = 0;
int frames = 0;
double timer = System.currentTimeMillis();
while(isRunning){
long now = System.nanoTime();
delta += (now - lastTime) / ns;
lastTime = now;
if(delta >= 1) {
tick();
render();
frames++;
delta--;
}
if(System.currentTimeMillis() - timer >= 1000) {
System.out.println("FPS: "+ frames);
frames = 0;
timer+=1000;
}
}
stop();
}
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyPressed(KeyEvent e) {
if(e.getKeyCode() == KeyEvent.VK_RIGHT || e.getKeyCode() == KeyEvent.VK_D) {
player.right = true;
System.out.println("Direita");
}else if(e.getKeyCode() == KeyEvent.VK_LEFT || e.getKeyCode() == KeyEvent.VK_A) {
player.left = true;
System.out.println("Esquerda");
}
if(e.getKeyCode() == KeyEvent.VK_UP || e.getKeyCode() == KeyEvent.VK_W) {
player.up = true;
System.out.println("Cima");
}else if(e.getKeyCode() == KeyEvent.VK_DOWN || e.getKeyCode() == KeyEvent.VK_S) {
player.down = true;
System.out.println("Baixo");
}
}
@Override
public void keyReleased(KeyEvent e) {
/*
if(e.getKeyCode() == KeyEvent.VK_RIGHT ||
e.getKeyCode() == KeyEvent.VK_D) {
//player.right = false;
}else if(e.getKeyCode() == KeyEvent.VK_LEFT ||
e.getKeyCode() == KeyEvent.VK_A) {
//player.left = false;
}
if(e.getKeyCode() == KeyEvent.VK_UP ||
e.getKeyCode() == KeyEvent.VK_W) {
//player.up = false;
}else if(e.getKeyCode() == KeyEvent.VK_DOWN ||
e.getKeyCode() == KeyEvent.VK_S) {
//player.down = false;
}
*/
}
}