【发布时间】：2013-03-07 00:54:31
【问题描述】：
我已经编写了以下代码。如果输入的字符不是空格，基本上我想激活自动完成（在 RSyntaxTextArea 环境中）。一切都很顺利，但有时我会收到 AWT-EventQueue-0 错误。程序仍会运行并正常运行，但会显示错误消息。
我的代码中有其他元素，但我很确定它来自这一点添加的代码。这有什么特别的原因吗？我注意到当我将鼠标移动到第二个屏幕时发生了这个错误。
public static CompletionProvider provider = createModelCompletionProvider();
public static AutoCompletion ac = new AutoCompletion(provider);
public static KeyListener ListenerTOntology = new KeyListener() {
@Override
public void keyPressed(KeyEvent e) {}
@Override
public void keyReleased(KeyEvent e) {}
@Override
public void keyTyped(KeyEvent e) {
dumpInfo("Typed", e);}
private void dumpInfo(String s, KeyEvent e) {
char temp = e.getKeyChar();
if(temp!=' ' )
ac.doCompletion();}
};
错误信息：
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at org.fife.ui.rtextarea.FoldIndicator.findOpenFoldClosestTo(FoldIndicator.java:162)
at org.fife.ui.rtextarea.FoldIndicator.access$300(FoldIndicator.java:60)
at org.fife.ui.rtextarea.FoldIndicator$Listener.mouseMoved(FoldIndicator.java:671)
at java.awt.AWTEventMulticaster.mouseMoved(AWTEventMulticaster.java:329)
at java.awt.Component.processMouseMotionEvent(Component.java:6550)
at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:3339)
at java.awt.Component.processEvent(Component.java:6274)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4505)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:729)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:688)
at java.awt.EventQueue$3.run(EventQueue.java:686)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:702)
at java.awt.EventQueue$4.run(EventQueue.java:700)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:699)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
【问题讨论】：
-
“我的代码中有其他元素，但我很确定它来自这一点添加的代码。” 堆栈跟踪应该会告诉你。发布SSCCE 我们可能也知道。
-
那么
FoldIndicator.findOpenFoldClosestTo中的代码是什么？FoldIndicator.java的第162行左右？ -
即RSyntaxTextArea.jar文件。我找不到源文件以查看其中的内容。我正在寻找。
-
基本上这是链接：tinyurl.com/bquuq75
-
可能与您的问题无关，假设 RSyntaxTextArea 基于 Swing 组件，您应该使用 DocumentListener，而不是 KeyListener 来监听用户输入。例如，当用户按下退格键或删除键时会发生什么？
标签： java awt keylistener