AWT-EventQueue-0錯誤

Question

我寫了下面的代碼。 基本上，如果輸入的字符不是空格，我想激活自動完成功能（在RSyntaxTextArea環境中）。 一切工作正常，但有時我會收到AWT-EventQueue-0錯誤。 該程序仍將運行並運行，但顯示錯誤消息。

我的代碼中還有其他元素，但是我很確定這是從添加的代碼中得出的。 有什么特殊原因嗎？ 我注意到將鼠標移至第二個屏幕時會發生此錯誤。

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();}
};

錯誤信息：

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)

Answer 1

因此，我發現了造成這種情況的原因。 您需要使用CaretListener而不是KeyListener。 由於RSyntaxTextArea不包含DocumentListner。