线程“AWT-EventQueue-0”中的异常 java.lang.ArrayIndexOutOfBoundsException: 132

ttt1783

我正在尝试制作一个游戏，在这个阶段它所做的就是创建一个可以移除或放置的瓷砖板。但是，当我将网格扩展到 128 以上的任何值时，它会崩溃。然而，只有当宽度是更大的数字时才会发生。如果高度更大，那么它会在第一个网格下方创建第二个网格，这会变得有点奇怪。下面是我的代码和我得到的错误的堆栈跟踪。

您可以通过更改世界设置中的值来查看它应该如何运行Game.java。（同样，如果宽度是更大的数字并且它乘以超过 128，这就是导致错误的原因。）

游戏.java

package engine;

import java.awt.*;
import javax.swing.*;

@SuppressWarnings("serial")
public class Game extends JPanel{
    private Thread thread;
    
    //world settings
    static int worldWidth = 11;
    static int worldHeight = 12;
    
    public int w = worldWidth;
    public int h = worldHeight;
    
    //window settings
    private static int windowWidth = 800;
    private static int windowHeight = 600;
    private static String windowTitle = "Game";
    
    //tile settings
    public static int tileSize = 50;
    
    public static int tilex;
    public static int tiley;
    
    private static byte[] tiles;

    public void paint(Graphics g) {
        super.paintComponent(g);

        //set background color
        setBackground(new Color(0,128,255));

        //set color and area of shape
        g.setColor(new Color(0,255,0));
        
        //checks array every repaint for modified tiles
        for(int x = 0; x < w; x++) {
            for (int y = 0; y < h; y++) {
                int i = y + (x * w);
                if (tiles[i] == 1) {
                    tilex = x * tileSize;
                    tiley = y * tileSize;
                    g.fillRect(tilex, tiley, tileSize, tileSize);
                }
            }
        }
        //Pointer/selector
    }

    public static void main(String[] args) throws InterruptedException {
        new Game();
    }
    
    public void init() {
        new Window(windowWidth, windowHeight, windowTitle, this);
        Window.running = true;
        
        thread = new Thread();
        thread.start();
        
        generate();
    }
    
    public void terminate() {
        System.exit(0);
    }
    
    public Game() throws InterruptedException {
        try {
            init();
        } catch (Exception e) {
            JOptionPane.showMessageDialog(null, e.toString(), "Failed to start " + windowTitle, JOptionPane.ERROR_MESSAGE);
            System.exit(1);
        }
        while(Window.running) {
            Thread.sleep(1);
            //closes game if escape is pressed or if window is closed (handled in window class)
            if (!Window.running) {
                System.out.println("Closing " + windowTitle);
                terminate();
            }
            //render
            repaint();
        }
    }
    
    public void generate() {
        tiles = new byte[w * h];
        for(int x = 0; x < w; x++) {
            for (int y = 0; y < h; y++) {
                int i = y + (x * w);
                //1 = tile present, 0 = not present
                tiles[i] = (byte) 1;
            }
        }
    }
    
    public static void changeSquare() {
        if (GameListener.mouseButton == 3 && GameListener.modifyBlock) {
            tiles[GameListener.byteToModify] = 1;
        } else if (GameListener.mouseButton == 1 && GameListener.modifyBlock){
            tiles[GameListener.byteToModify] = 0;
        }
    }
}

窗口.java

package engine;

import java.awt.Dimension;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;

public class Window {
    public static boolean running = false;

    public Window(int width, int height, String title, Game game) {
        //creates and displays window
        JFrame frame = new JFrame(title);
        
        KeyListener keylistener = new KeyListener() {

            @Override
            public void keyPressed(KeyEvent keyEvent) {
                GameListener.keyListener(keyEvent);
            }

            @Override
            public void keyReleased(KeyEvent keyEvent) {
                
            }

            @Override
            public void keyTyped(KeyEvent keyEvent) {
                
            }
        };
        
        MouseListener mouselistener = new MouseListener() {

            @Override
            public void mouseClicked(MouseEvent mouseEvent) {
                
            }

            @Override
            public void mouseEntered(MouseEvent mouseEvent) {
                
            }

            @Override
            public void mouseExited(MouseEvent mouseEvent) {
                
            }

            @Override
            public void mousePressed(MouseEvent mouseEvent) {
                GameListener.mouseListener(mouseEvent);
                Game.changeSquare();
            }

            @Override
            public void mouseReleased(MouseEvent mouseEvent) {
                
            }
        };
        
        MouseMotionListener mousemotionlistener = new MouseMotionListener() {

            @Override
            public void mouseDragged(MouseEvent mouseMotionEvent) {
                GameListener.mouseMotionListener(mouseMotionEvent);
            }

            @Override
            public void mouseMoved(MouseEvent arg0) {
                
            }
        };

        //listens for window close and sends back to game loop to terminate
        frame.addWindowListener(new WindowAdapter() {
            
            @Override
            public void windowClosing(WindowEvent e) {
                running = false;
            }
        });
        frame.getContentPane().addKeyListener(keylistener);
        frame.getContentPane().addMouseListener(mouselistener);
        frame.getContentPane().addMouseMotionListener(mousemotionlistener);
        frame.setPreferredSize(new Dimension(width, height));
        frame.add(game);
        frame.setLocationRelativeTo(null);
        frame.pack();
        frame.setVisible(true);
    }
}

最后是 GameListener.java

package engine;

import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;

public class GameListener {
    private static int tileX;
    private static int tileY;
    private static int xTries;
    private static int yTries;
    
    private static int tileXM;
    private static int tileYM;
    private static int xTriesM;
    private static int yTriesM;

    public static int byteToModify;
    public static int mouseButton;
    public static boolean modifyBlock;
    
    public static boolean drawSelector;
    public static int byteToDrawSelector;
    
    public static void keyListener(KeyEvent e) {
        int code = e.getKeyCode();
        
        //put key if statements here (for example escape to close
        
        //use for testing key name when adding a new if statement 
        //String character = KeyEvent.getKeyText(code);
        //System.out.println("Character: " + KeyEvent.getKeyText(code));
        //System.out.println("Code: " + code);
        
        //get key codes at keycode.info
        
        //closes game on escape
        if (code == 27) {
            //escape
            Window.running = false;
        }
        //movement
       // if (code == 87) {
            //W
        //  Game.y = Game.y - 100;
  //      }
      //  if (code == 65) {
            //A
       //   Game.x = Game.x - 100;
      //  }
      //  if (code == 83) {
            //S
       //   Game.y = Game.y + 100;
      //  }
       // if (code == 68) {
            //D
            //Game.x = Game.x + 100;
       // }
    }
    
    public static void mouseListener(MouseEvent e) {
        //System.out.println(e.getX());
        //System.out.println(e.getY());
        //System.out.println(e.getButton());
        
        xTries = 0;
        tileX = 0;
        yTries = 0;
        tileY = 0;
        modifyBlock = true;
        
        if (e.getX() < Game.tileSize) {
            
        } else if (e.getX() > Game.tileSize && e.getX() < (Game.tileSize * Game.worldWidth)) {
            for (int i = Game.tileSize; i<e.getX(); i = i + Game.tileSize) {
                xTries++;
            }
            //System.out.println(xTries);
            tileX = xTries;
        } else {
            System.err.println("User clicked outside of world");
            modifyBlock = false;
        }
        if (e.getY() < Game.tileSize) {
        } else if (e.getY() > Game.tileSize && e.getY() < (Game.tileSize * Game.worldHeight)) {
            for (int i = Game.tileSize; i<e.getY(); i = i + Game.tileSize) {
                yTries++;
            }
            //System.out.println(yTries);
            tileY = yTries;
        } else {
            System.err.println("User clicked outside of world");
            modifyBlock = false;
        }
        if (e.getButton() == MouseEvent.BUTTON1) {
            mouseButton = 1;
        } else if (e.getButton() == MouseEvent.BUTTON3) {
            mouseButton = 3;
        }
        byteToModify = tileY+(tileX * Game.worldWidth);
        
        //System.out.println(tileX);
        //System.out.println(tileY);
        //System.out.println(byteToModify);
    }
    
    public static void mouseMotionListener(MouseEvent e) {
        //System.out.println(e.getX());
        //System.out.println(e.getY());

        xTriesM = 0;
        tileXM = 0;
        yTriesM = 0;
        tileYM = 0;
        drawSelector = true;
        
        if (e.getX() < Game.tileSize) {
            
        } else if (e.getX() > Game.tileSize && e.getX() < (Game.tileSize * Game.worldWidth)) {
            for (int i = Game.tileSize; i<e.getX(); i = i + Game.tileSize) {
                xTriesM++;
            }
            //System.out.println(xTries);
            tileXM = xTriesM;
        } else {
            drawSelector = false;
        }
        if (e.getY() < Game.tileSize) {
        } else if (e.getY() > Game.tileSize && e.getY() < (Game.tileSize * Game.worldHeight)) {
            for (int i = Game.tileSize; i<e.getY(); i = i + Game.tileSize) {
                yTriesM++;
            }
            //System.out.println(yTries);
            tileYM = yTriesM;
        } else {
            drawSelector = false;
        }
        byteToDrawSelector = tileYM+(tileXM* Game.worldWidth);
    }
}

这是我加载游戏时遇到的错误。

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 132
    at engine.Game.paint(Game.java:45)
    at javax.swing.JComponent.paintChildren(Unknown Source)
    at javax.swing.JComponent.paint(Unknown Source)
    at javax.swing.JComponent.paintChildren(Unknown Source)
    at javax.swing.JComponent.paint(Unknown Source)
    at javax.swing.JLayeredPane.paint(Unknown Source)
    at javax.swing.JComponent.paintChildren(Unknown Source)
    at javax.swing.JComponent.paintToOffscreen(Unknown Source)
    at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
    at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
    at javax.swing.RepaintManager.paint(Unknown Source)
    at javax.swing.JComponent.paint(Unknown Source)
    at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
    at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
    at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
    at java.awt.Container.paint(Unknown Source)
    at java.awt.Window.paint(Unknown Source)
    at javax.swing.RepaintManager$4.run(Unknown Source)
    at javax.swing.RepaintManager$4.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
    at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
    at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
    at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
    at javax.swing.RepaintManager.access$1200(Unknown Source)
    at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
    at java.awt.event.InvocationEvent.dispatch(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$500(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 132
    at engine.Game.paint(Game.java:45)
    at javax.swing.JComponent.paintChildren(Unknown Source)
    at javax.swing.JComponent.paint(Unknown Source)
    at javax.swing.JComponent.paintChildren(Unknown Source)
    at javax.swing.JComponent.paint(Unknown Source)
    at javax.swing.JLayeredPane.paint(Unknown Source)
    at javax.swing.JComponent.paintChildren(Unknown Source)
    at javax.swing.JComponent.paintToOffscreen(Unknown Source)
    at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
    at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
    at javax.swing.RepaintManager.paint(Unknown Source)
    at javax.swing.JComponent.paint(Unknown Source)
    at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
    at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
    at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
    at java.awt.Container.paint(Unknown Source)
    at java.awt.Window.paint(Unknown Source)
    at javax.swing.RepaintManager$4.run(Unknown Source)
    at javax.swing.RepaintManager$4.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
    at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
    at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
    at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
    at javax.swing.RepaintManager.access$1200(Unknown Source)
    at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
    at java.awt.event.InvocationEvent.dispatch(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$500(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)

它说问题出在Game.java第 45 行，但我真的不明白是什么原因造成的。对不起，如果这是一个愚蠢的问题。

阿布拉

您在for循环中的计算是错误的。

首先，w（ class 中的成员变量Game）实际上表示 [二维] 瓷砖网格中的列数，h（ class 中的另一个成员变量Game）表示行数。您在嵌套for循环中使用了错误的方法。所以代替

for(int x = 0; x < w; x++) {
    for (int y = 0; y < h; y++) {

你应该有

for(int x = 0; x < h; x++) {
    for (int y = 0; y < w; y++) {

所以我只改变了 class 的代码Game。为了完整起见，这里是带有上述更改的类的完整代码。

package engine;

import java.awt.*;
import javax.swing.*;

@SuppressWarnings("serial")
public class Game extends JPanel {
    private Thread thread;

    // world settings
    static int worldWidth = 12;
    static int worldHeight = 11;

    public int w = worldWidth;
    public int h = worldHeight;

    // window settings
    private static int windowWidth = 800;
    private static int windowHeight = 600;
    private static String windowTitle = "Game";

    // tile settings
    public static int tileSize = 50;

    public static int tilex;
    public static int tiley;

    private static byte[] tiles;

    protected void paintComponent(Graphics g) {
        super.paintComponent(g);

        // set background color
        setBackground(new Color(0, 128, 255));

        // set color and area of shape
        g.setColor(new Color(0, 255, 0));

        // checks array every repaint for modified tiles
        for (int x = 0; x < h; x++) {
            for (int y = 0; y < w; y++) {
                int i = y + (x * w);
                if (tiles[i] == 1) {
                    tilex = x * tileSize;
                    tiley = y * tileSize;
                    g.fillRect(tilex, tiley, tileSize, tileSize);
                }
            }
        }
    }

    public static void main(String[] args) throws InterruptedException {
        new Game();
    }

    public void init() {
        new Window(windowWidth, windowHeight, windowTitle, this);
        Window.running = true;

        thread = new Thread();
        thread.start();

        generate();
    }

    public void terminate() {
        System.exit(0);
    }

    public Game() throws InterruptedException {
        try {
            init();
        }
        catch (Exception e) {
            e.printStackTrace();
            JOptionPane.showMessageDialog(null, e.toString(), "Failed to start " + windowTitle,
                    JOptionPane.ERROR_MESSAGE);
            System.exit(1);
        }
        while (Window.running) {
            Thread.sleep(1);
            // closes game if escape is pressed or if window is closed (handled in window
            // class)
            if (!Window.running) {
                System.out.println("Closing " + windowTitle);
                terminate();
            }
            // render
            repaint();
        }
    }

    public void generate() {
        tiles = new byte[w * h];
        for (int x = 0; x < h; x++) {
            for (int y = 0; y < w; y++) {
                int i = y + (x * w);
                // 1 = tile present, 0 = not present
                tiles[i] = (byte) 1;
            }
        }
    }

    public static void changeSquare() {
        if (GameListener.mouseButton == 3 && GameListener.modifyBlock) {
            tiles[GameListener.byteToModify] = 1;
        }
        else if (GameListener.mouseButton == 1 && GameListener.modifyBlock) {
            tiles[GameListener.byteToModify] = 0;
        }
    }
}

你还应该注意的是你的设计中包含循环依赖，因为这三个类别中的每一个Game，GameListener以及Window参考其他两个。这通常是一个糟糕的设计。

本文收集自互联网，转载请注明来源。

如有侵权，请联系 [email protected] 删除。

编辑于 2021-08-19

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