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java.lang.reflect.UndeclaredThrowableException at $Proxy6.configurationXmlChanged(Unknown Source) at org.netbeans.spi.project.support.ant.AntProjectHelper$5.run(AntProjectHelper.java:449) at org.openide.util.Mutex.readAccess(Mutex.java:227) at org.netbeans.spi.project.support.ant.AntProjectHelper.fireChange(AntProjectHelper.java:444) at org.netbeans.spi.project.support.ant.AntProjectHelper.access$900(AntProjectHelper.java:70) at org.netbeans.spi.project.support.ant.AntProjectHelper$3.run(AntProjectHelper.java:407) at org.openide.util.Mutex.readAccess(Mutex.java:227) at org.netbeans.spi.project.support.ant.AntProjectHelper$4.run(AntProjectHelper.java:421) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:499) [catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:932) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedMethodAccessor44.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:416) ... 10 more Caused by: java.lang.NullPointerException at java.util.HashSet.<init>(HashSet.java:99) at org.netbeans.modules.javacore.classpath.MergedClassPathImplementation.updateEntries(MergedClassPathImplementation.java:283) at org.netbeans.modules.javacore.classpath.MergedClassPathImplementation.access$100(MergedClassPathImplementation.java:56) at org.netbeans.modules.javacore.classpath.MergedClassPathImplementation$SFBQListener.stateChanged(MergedClassPathImplementation.java:368) at org.openide.util.WeakListenerImpl$Change.stateChanged(WeakListenerImpl.java:284) at org.netbeans.modules.java.j2seproject.queries.CompiledSourceForBinaryQuery$Result.fireChange(CompiledSourceForBinaryQuery.java:196) at org.netbeans.modules.java.j2seproject.queries.CompiledSourceForBinaryQuery$Result.propertyChange(CompiledSourceForBinaryQuery.java:182) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276) at org.netbeans.modules.java.j2seproject.SourceRoots.resetCache(SourceRoots.java:388) at org.netbeans.modules.java.j2seproject.SourceRoots.access$1100(SourceRoots.java:60) at org.netbeans.modules.java.j2seproject.SourceRoots$ProjectMetadataListener.configurationXmlChanged(SourceRoots.java:421) ... 14 more ==> java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedMethodAccessor44.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:416) at $Proxy6.configurationXmlChanged(Unknown Source) at org.netbeans.spi.project.support.ant.AntProjectHelper$5.run(AntProjectHelper.java:449) at org.openide.util.Mutex.readAccess(Mutex.java:227) at org.netbeans.spi.project.support.ant.AntProjectHelper.fireChange(AntProjectHelper.java:444) at org.netbeans.spi.project.support.ant.AntProjectHelper.access$900(AntProjectHelper.java:70) at org.netbeans.spi.project.support.ant.AntProjectHelper$3.run(AntProjectHelper.java:407) at org.openide.util.Mutex.readAccess(Mutex.java:227) at org.netbeans.spi.project.support.ant.AntProjectHelper$4.run(AntProjectHelper.java:421) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:499) [catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:932) Caused by: java.lang.NullPointerException at java.util.HashSet.<init>(HashSet.java:99) at org.netbeans.modules.javacore.classpath.MergedClassPathImplementation.updateEntries(MergedClassPathImplementation.java:283) at org.netbeans.modules.javacore.classpath.MergedClassPathImplementation.access$100(MergedClassPathImplementation.java:56) at org.netbeans.modules.javacore.classpath.MergedClassPathImplementation$SFBQListener.stateChanged(MergedClassPathImplementation.java:368) at org.openide.util.WeakListenerImpl$Change.stateChanged(WeakListenerImpl.java:284) at org.netbeans.modules.java.j2seproject.queries.CompiledSourceForBinaryQuery$Result.fireChange(CompiledSourceForBinaryQuery.java:196) at org.netbeans.modules.java.j2seproject.queries.CompiledSourceForBinaryQuery$Result.propertyChange(CompiledSourceForBinaryQuery.java:182) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276) at org.netbeans.modules.java.j2seproject.SourceRoots.resetCache(SourceRoots.java:388) at org.netbeans.modules.java.j2seproject.SourceRoots.access$1100(SourceRoots.java:60) at org.netbeans.modules.java.j2seproject.SourceRoots$ProjectMetadataListener.configurationXmlChanged(SourceRoots.java:421) ... 14 more ==> java.lang.NullPointerException at java.util.HashSet.<init>(HashSet.java:99) at org.netbeans.modules.javacore.classpath.MergedClassPathImplementation.updateEntries(MergedClassPathImplementation.java:283) at org.netbeans.modules.javacore.classpath.MergedClassPathImplementation.access$100(MergedClassPathImplementation.java:56) at org.netbeans.modules.javacore.classpath.MergedClassPathImplementation$SFBQListener.stateChanged(MergedClassPathImplementation.java:368) at org.openide.util.WeakListenerImpl$Change.stateChanged(WeakListenerImpl.java:284) at org.netbeans.modules.java.j2seproject.queries.CompiledSourceForBinaryQuery$Result.fireChange(CompiledSourceForBinaryQuery.java:196) at org.netbeans.modules.java.j2seproject.queries.CompiledSourceForBinaryQuery$Result.propertyChange(CompiledSourceForBinaryQuery.java:182) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276) at org.netbeans.modules.java.j2seproject.SourceRoots.resetCache(SourceRoots.java:388) at org.netbeans.modules.java.j2seproject.SourceRoots.access$1100(SourceRoots.java:60) at org.netbeans.modules.java.j2seproject.SourceRoots$ProjectMetadataListener.configurationXmlChanged(SourceRoots.java:421) at sun.reflect.GeneratedMethodAccessor44.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:416) at $Proxy6.configurationXmlChanged(Unknown Source) at org.netbeans.spi.project.support.ant.AntProjectHelper$5.run(AntProjectHelper.java:449) at org.openide.util.Mutex.readAccess(Mutex.java:227) at org.netbeans.spi.project.support.ant.AntProjectHelper.fireChange(AntProjectHelper.java:444) at org.netbeans.spi.project.support.ant.AntProjectHelper.access$900(AntProjectHelper.java:70) at org.netbeans.spi.project.support.ant.AntProjectHelper$3.run(AntProjectHelper.java:407) at org.openide.util.Mutex.readAccess(Mutex.java:227) at org.netbeans.spi.project.support.ant.AntProjectHelper$4.run(AntProjectHelper.java:421) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:499) [catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:932)
Reorganization of java component
This issue is not valid in current builds any more. Java support was completely redesigned in 6.0 time frame. Please use NetBeans 6.0 and later.
ok