java - 线程 :Snake game 中出现异常

Question

我正在创建一个贪吃蛇游戏我使用二维数组作为我的背框。没有语法错误。我在线程中收到异常。这就是我认为错误所在:

 java.awt.EventQueue.invokeLater(new Runnable() {
        @Override
        public void run() {
            new SnakeGame().setVisible(true);
        SnakeGame obj1;
        obj1= new SnakeGame();
        obj1.gameEngine();
                    }

或

case 908:
            x9y8= new JLabel(icon);
            break;
             case 9:
            x0y9= new JLabel(icon);
            break;

我正在使用 netbeans 并使用调色板创建标签。因此标签已经创建。异常(exception)是:

运行:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at javax.swing.ImageIcon.<init>(ImageIcon.java:205)
    at snakegamex.SnakeGame.<init>(SnakeGame.java:775)
    at snakegamex.SnakeGame$1.run(SnakeGame.java:744)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:705)
    at java.awt.EventQueue.access$000(EventQueue.java:101)
    at java.awt.EventQueue$3.run(EventQueue.java:666)
    at java.awt.EventQueue$3.run(EventQueue.java:664)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
BUILD SUCCESSFUL (total time: 4 seconds)

错误是什么？我应该如何纠正它？错误应该出现在第 775 行

int score=0;
int n=5,c=7;
ImageIcon image= new ImageIcon(getClass().getResource("1327691176237.jpg"));
ImageIcon image1= new ImageIcon(getClass().getResource("1327691176397.jpg"));

我已将图像导入到包中，并且还创建了默认包

Answer 1

异常发生在类构造函数内的 SnakeGame 类的第 775 行 - 看起来您正在尝试创建一个 ImageIcon 对象，并传入 null引用而不是一些图像数据。