Question

我在黄点（image）“点击”时有时会看到这个错误（有时会出现，有时不会出现），但我不明白为什么...... 我知道也许它看起来非常混乱，但这是我第一次使用java制作游戏。

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 22
at Gameplay.paint(Gameplay.java:140)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5210)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1579)
at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1502)
at javax.swing.RepaintManager.paint(RepaintManager.java:1272)
at javax.swing.JComponent._paintImmediately(JComponent.java:5158)
at javax.swing.JComponent.paintImmediately(JComponent.java:4969)
at javax.swing.RepaintManager$4.run(RepaintManager.java:831)
at javax.swing.RepaintManager$4.run(RepaintManager.java:814)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:814)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:789)
at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:738)
at javax.swing.RepaintManager.access$1200(RepaintManager.java:64)
at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1732)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

这是我的绘画方法：

 if (enemyXPos[xPos] == snakeXLenght[0] && enemyYPos[yPos] == snakeYLenght[0]) {

        score++;
        lenghtOfSnake++;
        xPos = random.nextInt(34);
        yPos = random.nextInt(23);
    }

    //line140:
    enemyImage.paintIcon(this, graphics, enemyXPos[xPos], enemyYPos[yPos]);


    for (int b = 1; b < lenghtOfSnake; b++) {
        if (snakeXLenght[b] == snakeXLenght[0] && snakeYLenght[b] == snakeYLenght[0]) {
            right = false;
            left = false;
            up = false;
            down = false;

            graphics.setColor(Color.white);
            graphics.setFont(new Font("arial", Font.BOLD, 50));
            graphics.drawString("YOU LOSE", 300, 300);

            graphics.setFont(new Font("arial", Font.BOLD, 20));
            graphics.drawString("Space to  RESTART", 350, 340);
        }
    }

    graphics.dispose();
}

这是我的阵列：

private int[] enemyXPos = {25, 50,  75,  100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500, 525, 550, 575, 600, 625, 650, 675, 700, 725, 750, 775, 800, 825, 850};
private int[] enemyYPos = {75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500, 525, 575, 600, 625};

如果我没有显示足够的代码，只需说出来并粘贴更多。

Answer 1

在Gameplay.java，140行（在您的paint()方法中），您正试图从数组中获取内容。该数组小于您提供的索引（您尝试在索引22处获取项目，但该数组可能包含21个项目。

确保enemyXPos和enemyYPos分别等于或大于xPos和yPos。

Answer 2

此代码不足以给出具体答案，但看起来enemyXPos或enemyYPos尺寸不足。

我的蛇游戏中有一点错误

2 个答案: