java - 线程中的异常 "AWT-EventQueue-0"java.lang.ArrayIndexOutOfBoundsException : 0 when trying to compare a string to a string array in Hangman game

Question

我正在用 Java 为大学类(class)制作一个 Hangman 游戏，但我的代码遇到了问题。我已经可以运行并打开它，但是当我在文本框中输入一个字母进行猜测时，我收到此错误:

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 0
at hangman.HangmanFrame.guessButtonActionPerformed(HangmanFrame.java:164)
at hangman.HangmanFrame.access$000(HangmanFrame.java:14)
at hangman.HangmanFrame$1.actionPerformed(HangmanFrame.java:75)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6290)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6055)
at java.awt.Container.processEvent(Container.java:2039)
at java.awt.Component.dispatchEventImpl(Component.java:4653)
at java.awt.Container.dispatchEventImpl(Container.java:2097)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4575)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4236)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4166)
at java.awt.Container.dispatchEventImpl(Container.java:2083)
at java.awt.Window.dispatchEventImpl(Window.java:2482)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:648)
at java.awt.EventQueue.access$000(EventQueue.java:84)
at java.awt.EventQueue$1.run(EventQueue.java:607)
at java.awt.EventQueue$1.run(EventQueue.java:605)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:621)
at java.awt.EventQueue$2.run(EventQueue.java:619)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:618)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

根据列表中的第一个错误，我怀疑它与这部分代码有关:

    do
    {
        if (playerGuess.equals(arrayToGuess[c]))
        {
            correct = true;
            lettersToGet[c] = playerGuess;
        }

        c++;
    }
    while (c < 6);

    c = 0;

更具体地说:

if (playerGuess.equals(arrayToGuess[c]))

我不知道这有什么问题，因为这是我第一次使用字符串数组并将数组每个部分中的字符与用户输入的字符进行比较。希望有人能帮忙。如果您需要更多信息，请告诉我，我会尽快回复您。我还创建了一个短期 Pastebin，以便可以查看整个代码以帮助发现问题:Pastebin Link

谢谢

Answer 1

你的问题是 split 方法 - 它用 reqexp 分割字符串，点有特殊含义，你必须设置

    String breaker = "[.]";

或

    String breaker = "\\.";

顺便说一句:如果您需要获取字符串的第 i 个字符，您可以使用 s.charAt( i ) 并且不需要拆分;-)