扫雷游戏异常错误

Question

您好，我目前正在尝试创建一个扫雷游戏，我有我的图形用户界面并使用二维数组来存储某个位置是否有地雷，但是当我尝试使用此方法单击地雷来结束游戏时代码：

if (board[row][col] == 1) {
    return GameStatus.Lost; }  
else {
    return GameStatus.Continue;
 }

我收到错误为

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 10
at Game.getGameStatus(Game.java:55)
at MineSweeperPanel$ButtonListener.actionPerformed(MineSweeperPanel.java:71)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(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$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.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)

Answer 1

检查您在 row 和 col 中调用的边界。例如，如果您有 25 行和 25 列，并且您引用的是 board[25][25]，则这超出了数组的边界。尽管行数的总大小为 25，但在数组中索引将从 0 到 25-1。

Answer 2

数组索引越界意味着您的数组中有（比如说）10 个元素，但您尝试访问（比如说）第 11 个元素 - 它根本不存在。

健全性检查 - 数组从 0 开始索引，row 和 col 中的值是否从 1 开始索引？

Answer 3

什么时候发生？

当您尝试访问索引超出其长度的数组时，会发生越界异常。 java数组的最大索引是（长度-1）
例如：

String [] stringArray = new String[10];
stringArray[10]
// the code above will produce an out of bounds exception, because the it bigger than length -1, which is 10 - 1 = 9.

如果您不知道数组的大小或长度，可以通过stringArray.length知道。

怎么处理呢？

您应该确保您的程序不会访问索引大于 length - 1 的数组。
示例：

for(int i=0;i<stringArray.lenght;i++) {
    //write your code here
}

上面的代码将保证 stringArray 的访问永远不会超出其最大索引。

您的情况

在您的情况下，您必须定义了数组限制并尝试访问超出定义限制范围的数组数据。

另请阅读此了解更多信息...

示例二维数组出现越界异常