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PONullPointerException in my game, can't be fixed
 

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  1. PONullPointerException in my game, can't be fixed
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    <p>I'm making an rpg with a custom pixel engine, and when I try to run it I just get a NullPointerException and I know why, but when I try to initialize that variable I get another one in a different location and I fix that and now it won't run at all and I still get a NullPointerException. This is the class that gets an error, and the console tells me that the error is on the line that says screen.render();</p> <pre><code>import java.awt.Canvas; import java.awt.Dimension; import java.awt.Graphics; import java.awt.image.BufferStrategy; import java.awt.image.BufferedImage; import java.awt.image.DataBufferInt; import java.io.IOException; import java.util.Random; import javax.imageio.ImageIO; import javax.swing.JFrame; import sprites.SpriteSheetLoader; public class Game extends Canvas implements Runnable{ private static final long serialVersionUID = 1L; public static final int HEIGHT = 120; public static final int WIDTH = 120; public static final int SCALE = 3; public static final String NAME = "TypicalRPG"; public SpriteSheetLoader loader; private BufferedImage img = new BufferedImage(WIDTH * SCALE, HEIGHT * SCALE, BufferedImage.TYPE_INT_RGB); private int[] pixels = ((DataBufferInt) img.getRaster().getDataBuffer()).getData(); private boolean running = false; private Screen screen = new Screen(WIDTH, HEIGHT, loader); Random random = new Random(); public void start(){ running = true; new Thread(this).start(); } public static void main(String args[]){ Game game = new Game(); game.setPreferredSize(new Dimension(WIDTH * SCALE, HEIGHT * SCALE)); game.setMaximumSize(new Dimension(WIDTH * SCALE, HEIGHT * SCALE)); game.setMinimumSize(new Dimension(WIDTH * SCALE, HEIGHT * SCALE)); JFrame jf = new JFrame(NAME); jf.add(game); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.pack(); jf.setVisible(true); jf.setResizable(true); game.start(); } public void run(){ while(running){ tick(); render(); try{ Thread.sleep(5); } catch(InterruptedException e){ e.printStackTrace(); } } } public void stop(){ running = false; } public void tick(){ screen.render(0, 0, 0, 16, 16); } public void render(){ BufferStrategy bs = getBufferStrategy(); if(bs == null){ createBufferStrategy(3); requestFocus(); return; } for(int i = 0; i &lt; screen.pixels.length; i++){ pixels[i] = screen.pixels[i]; } Graphics g = bs.getDrawGraphics(); g.drawImage(img, 0, 0, getWidth(), getHeight(), null); g.dispose(); bs.show(); } public void init(){ BufferedImage sheet = null; try { sheet = ImageIO.read(Game.class.getResourceAsStream("res/tiles.png")); } catch (IOException e) { e.printStackTrace(); } loader = new SpriteSheetLoader(sheet); screen = new Screen(WIDTH, HEIGHT, loader); } } </code></pre> <p>and this is the class that has render():</p> <pre><code>import sprites.SpriteSheetLoader; public class Screen{ public int[] pixels; private SpriteSheetLoader loader; private int w, h; int xoff = 0, yoff = 0; public Screen(int w, int h, SpriteSheetLoader loader){ this.loader = loader; this.w = w; this.h = h; pixels = new int[w * h]; } public void render(int xpos, int ypos, int tile, int width, int height){ loader.grabTile(tile, width, height); xpos -= xoff; ypos -= yoff; for(int y = 0; y &lt; height; y++){ if(ypos + y &lt; 0 || ypos + y &gt;= h) continue; for(int x = 0; x &lt; width; x++){ if(xpos + x &lt; 0 || xpos + x &gt;= w) continue; int col = loader.pixels[x + (y * height)]; if(col != -65281) pixels[(x + xpos) + (y + ypos)] = col; } } } } </code></pre>
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    1. USSuperCheezGi
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      1. VTUpMod
    1. COCan you post an actual stack trace of the error?
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      1. UScasablanca
 

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