私は Java でアプリケーションを開発しており、3 つの主要なクラス ファイルを書き終えましたが、わかりにくいエラーが発生しました。現在、画面にピクセルを描画しようとしていますが、ピクセル配列が機能しません。
コードで警告またはエラーが発生しているにもかかわらず、Render.javaでIndexOutOfBoundsExceptionを取得していますか?
Display.java
public class Display extends Canvas implements Runnable {
private static final long serialVersionUID = 1L;
public static final int WIDTH = 300;
public static final int HEIGHT = 190;
public static final int SCALE = 3;
public static Dimension DIMENSION = new Dimension(WIDTH * SCALE, HEIGHT * SCALE);
public static final String TITLE = "Untitled Project";
public int[] pixels;
public boolean isRunning = false;
public Thread thread;
public Screen screen;
public Render render;
public BufferedImage img;
public Display() {
screen = new Screen(WIDTH, HEIGHT);
img = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
pixels = ((DataBufferInt) img.getRaster().getDataBuffer()).getData();
}
public void start(boolean isDebug) {
if (isRunning)
return;
isRunning = true;
thread = new Thread(this);
thread.start();
}
public void stop() {
if (!isRunning)
return;
isRunning = false;
try {
thread.join();
} catch (Exception e) {
e.printStackTrace();
System.exit(0);
}
}
private void render() {
BufferStrategy bs = this.getBufferStrategy();
if (bs == null) {
createBufferStrategy(3);
return;
}
screen.render();
for (int i = 0; i < WIDTH * HEIGHT; i++)
pixels[i] = screen.pixels[i];
Graphics g = bs.getDrawGraphics();
g.drawImage(img, 0, 0, WIDTH, HEIGHT, null);
g.dispose();
bs.show();
}
private void tick() {
}
public void run() {
while (isRunning) {
render();
tick();
}
}
public static void main(String[] args) {
Display display = new Display();
display.setMinimumSize(DIMENSION);
display.setMaximumSize(DIMENSION);
display.setPreferredSize(DIMENSION);
JFrame frame = new JFrame();
frame.setTitle(TITLE);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(display, BorderLayout.CENTER);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setResizable(false);
frame.setVisible(true);
display.start(true);
}
}
Render.java
public class Render {
public final int width;
public final int height;
public final int[] pixels;
public Render(int width, int height) {
this.width = width;
this.height = height;
pixels = new int[width * height];
}
public void draw(Render render, int xOffset, int yOffset) {
for (int y = 0; y < render.height; y++) {
int yPix = y + yOffset;
for (int x = 0; x < render.width; x++) {
int xPix = x + xOffset;
ERROR --> pixels[xPix + yPix * width] = render.pixels[x + y * render.width];
}
}
}
}
Screen.java
public class Screen extends Render {
public Render render;
public Random random;
public Screen(int width, int height) {
super(width, height);
render = new Render(256, 256);
random = new Random();
for (int i = 0; i < 256 * 256; i++) {
render.pixels[i] = random.nextInt();
}
}
public void render() {
draw(render, 0, 0);
}
}
エラー
Exception in thread "Thread-2" java.lang.ArrayIndexOutOfBoundsException: 57000
at com.willajhughes.java.graphics.Render.draw(Render.java:23)
at com.willajhughes.java.graphics.Screen.render(Screen.java:21)
at com.willajhughes.java.Display.render(Display.java:76)
at com.willajhughes.java.Display.run(Display.java:94)
at java.lang.Thread.run(Unknown Source)