Exception in thread "AWT-EventQueue-0"

Programação Java
#1

Não to conseguindo entender o erro, ainda tô no início, se alguém puder me ajudar e quiser saber mais coisas,
é só perguntar.

Exception in thread "AWT-EventQueue-0" java.lang.Error: java.lang.reflect.InvocationTargetException
        at org.jdesktop.application.ApplicationAction.actionFailed(ApplicationAction.java:859)
        at org.jdesktop.application.ApplicationAction.noProxyActionPerformed(ApplicationAction.java:665)
        at org.jdesktop.application.ApplicationAction.actionPerformed(ApplicationAction.java:698)
        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.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
        at java.awt.Component.processMouseEvent(Component.java:6041)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
        at java.awt.Component.processEvent(Component.java:5806)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4413)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4243)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
        at java.awt.Container.dispatchEventImpl(Container.java:2102)
        at java.awt.Window.dispatchEventImpl(Window.java:2440)
        at java.awt.Component.dispatchEvent(Component.java:4243)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.jdesktop.application.ApplicationAction.noProxyActionPerformed(ApplicationAction.java:662)
        ... 27 more
Caused by: java.util.regex.PatternSyntaxException: Unclosed group near index 1
(
 ^
        at java.util.regex.Pattern.error(Pattern.java:1713)
        at java.util.regex.Pattern.accept(Pattern.java:1571)
        at java.util.regex.Pattern.group0(Pattern.java:2533)
        at java.util.regex.Pattern.sequence(Pattern.java:1806)
        at java.util.regex.Pattern.expr(Pattern.java:1752)
        at java.util.regex.Pattern.compile(Pattern.java:1460)
        at java.util.regex.Pattern.<init>(Pattern.java:1133)
        at java.util.regex.Pattern.compile(Pattern.java:823)
        at java.lang.String.replaceFirst(String.java:2147)

  [b]      at testcompilator.Compilator.lookFor(Compilator.java:220)
        at testcompilator.Compilator.compile2(Compilator.java:150)
        at testcompilator.TestCompilatorView.ABC2(TestCompilatorView.java:253)[/b]
        ... 32 more

O erro em negrito são os métodos que eu fiz. Funciona assim,
aperto um botão, ele ativa o método ABC2, depois vamos para outro método
não-mencionado aqui, o compile, depois vamos para o compile2 e depois
para o lookFor, onde é o início do problema (e onde eu ainda posso mexer).

Colocarei as linhas de cada método na ordem dita:

ABC2():
        compiler.compile2();
compile2():
        lookFor(new StringTokenizer(s1,"(){};",true),new StringTokenizer(s1,"(){};",true),"\s*if\s*");
lookFor():
        bufs = bufs.replaceFirst(tempAnt, "");

Espero que vocês consigam entender e me ajudar.

Flw

#2