Where is the "new java class" option?

When you have created the src folder (under the Project Directory structure), create a sub-folder naming it as "java" the color of the folder should be green ( that means you can create a class from the java folder) but if it not green, just right click on the java folder then scroll down to "Open Module Settings" then click on "Make Directory as" then select "Test Sources Root". The color of the java folder will automatically change to color green. You can now create your java class.. 

Also: if you package name / folder contains "-" like com.company.cool-name.gui then Intellij IDEA (rightfully) considers it a folder, not a package name. And hence you cannot create a Java class in that path.

This option is available under the Source Roots only, see here: https://stackoverflow.com/questions/2249494/how-do-i-create-a-new-class-in-intellij-without-using-the-mouse.

Also check https://www.jetbrains.com/help/idea/configuring-content-roots.html .

As far as I know, the "-" symbol is not allowed in Java package names. (https://docs.oracle.com/javase/tutorial/java/package/namingpkgs.html)

In future releases, we plan to inform the developer that the package was created in the wrong format. Please follow https://youtrack.jetbrains.com/issue/IDEA-130684 for updates.

Explicitly setting the context root worked. Thanks.  

We have a java source tree with about 40 projects under a single parent.  It contains no IDEA files in SCCS.  When I open it for the first time, it partly recognizes the project structure in that it marks each "java" folder as a src folder, but not its child folders.  

Consequently, File->New has a "java class" option only for the "java" folder & never for the subfolder I actually want to create a java class file in.  Is there a way to get IDEA to automatically mark the subfolders as src?

FWIW, the child folders of "java" are marked with a brown folder containing a blue dot, in the Project Structure->Modules pane.

I'm using IDEA 2016.1.4.

When you create a folder, create another folder inside that folder and name it src. Once you've done that, double click on the original source and project structure window will pop up. highlight the src folder inside of your custom folder and click the '+' sign on the right to 'Add content Root', click ok. You should be able to make Java classes now. There is probably a better way to do this, but I just figured this out just now.

@... Thanks that helped! I'm Kwabena Agyeman btw ;-) 

@Elbelgrade green color denotes Test Sources Root. If you need a production source, use Source Root folder category, see related documentation: Folder categories.

 @Andrey Dernov thanks for sharing the link. Just read through it now and found it very helpful.

Andrey Derniv I kind of have a question I would like to ask concerning a build sync failure issue on intellij. See the error am getting below:

org.gradle.internal.exceptions.LocationAwareException: Failed to notify build listener.
at org.gradle.initialization.exception.DefaultExceptionAnalyser.transform(DefaultExceptionAnalyser.java:99)
at org.gradle.initialization.exception.DefaultExceptionAnalyser.collectFailures(DefaultExceptionAnalyser.java:65)
at org.gradle.initialization.exception.MultipleBuildFailuresExceptionAnalyser.transform(MultipleBuildFailuresExceptionAnalyser.java:40)
at org.gradle.initialization.exception.StackTraceSanitizingExceptionAnalyser.transform(StackTraceSanitizingExceptionAnalyser.java:30)
at org.gradle.initialization.DefaultGradleLauncher.finishBuild(DefaultGradleLauncher.java:186)
at org.gradle.initialization.DefaultGradleLauncher.finishBuild(DefaultGradleLauncher.java:117)
at org.gradle.internal.invocation.GradleBuildController$3.create(GradleBuildController.java:86)
at org.gradle.internal.invocation.GradleBuildController$3.create(GradleBuildController.java:78)
at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:189)
at org.gradle.internal.work.StopShieldingWorkerLeaseService.withLocks(StopShieldingWorkerLeaseService.java:40)
at org.gradle.internal.invocation.GradleBuildController.doBuild(GradleBuildController.java:78)
at org.gradle.internal.invocation.GradleBuildController.configure(GradleBuildController.java:67)
at org.gradle.tooling.internal.provider.runner.ClientProvidedBuildActionRunner.run(ClientProvidedBuildActionRunner.java:57)
at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
at org.gradle.launcher.exec.BuildOutcomeReportingBuildActionRunner.run(BuildOutcomeReportingBuildActionRunner.java:63)
at org.gradle.tooling.internal.provider.ValidatingBuildActionRunner.run(ValidatingBuildActionRunner.java:32)
at org.gradle.launcher.exec.BuildCompletionNotifyingBuildActionRunner.run(BuildCompletionNotifyingBuildActionRunner.java:39)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner$3.call(RunAsBuildOperationBuildActionRunner.java:51)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner$3.call(RunAsBuildOperationBuildActionRunner.java:45)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102)
at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.run(RunAsBuildOperationBuildActionRunner.java:45)
at org.gradle.launcher.exec.InProcessBuildActionExecuter$1.transform(InProcessBuildActionExecuter.java:50)
at org.gradle.launcher.exec.InProcessBuildActionExecuter$1.transform(InProcessBuildActionExecuter.java:47)
at org.gradle.composite.internal.DefaultRootBuildState.run(DefaultRootBuildState.java:78)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:47)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:31)
at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:42)
at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:28)
at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:78)
at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:52)
at org.gradle.tooling.internal.provider.SubscribableBuildActionExecuter.execute(SubscribableBuildActionExecuter.java:59)
at org.gradle.tooling.internal.provider.SubscribableBuildActionExecuter.execute(SubscribableBuildActionExecuter.java:36)
at org.gradle.tooling.internal.provider.SessionScopeBuildActionExecuter.execute(SessionScopeBuildActionExecuter.java:68)
at org.gradle.tooling.internal.provider.SessionScopeBuildActionExecuter.execute(SessionScopeBuildActionExecuter.java:38)
at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:37)
at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:26)
at org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:43)
at org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:29)
at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:60)
at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:32)
at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:55)
at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:41)
at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:48)
at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:32)
at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:68)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:39)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:27)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:35)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.create(ForwardClientInput.java:78)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.create(ForwardClientInput.java:75)
at org.gradle.util.Swapper.swap(Swapper.java:38)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:75)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:55)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:63)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:82)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:52)
at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:297)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
Caused by: org.gradle.internal.event.ListenerNotificationException: Failed to notify build listener.
at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:86)
at org.gradle.internal.event.BroadcastDispatch$CompositeDispatch.dispatch(BroadcastDispatch.java:325)
at org.gradle.internal.event.BroadcastDispatch$CompositeDispatch.dispatch(BroadcastDispatch.java:235)
at org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:141)
at org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:37)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
at com.sun.proxy.$Proxy15.buildFinished(Unknown Source)
at org.gradle.initialization.DefaultGradleLauncher.finishBuild(DefaultGradleLauncher.java:171)
... 73 more
Caused by: java.lang.AbstractMethodError
at org.gradle.api.internal.artifacts.ivyservice.resolutionstrategy.DefaultCachePolicy.mustRefreshModule(DefaultCachePolicy.java:219)
at org.gradle.api.internal.artifacts.ivyservice.resolutionstrategy.DefaultCachePolicy.mustRefreshModule(DefaultCachePolicy.java:205)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.CachingModuleComponentRepository$LocateInCacheRepositoryAccess.resolveComponentMetaDataFromCache(CachingModuleComponentRepository.java:215)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.CachingModuleComponentRepository$LocateInCacheRepositoryAccess.resolveComponentMetaData(CachingModuleComponentRepository.java:188)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingModuleComponentRepository$ErrorHandlingModuleComponentRepositoryAccess.lambda$resolveComponentMetaData$5(ErrorHandlingModuleComponentRepository.java:154)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingModuleComponentRepository$ErrorHandlingModuleComponentRepositoryAccess.lambda$tryResolveAndMaybeBlacklist$18(ErrorHandlingModuleComponentRepository.java:223)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingModuleComponentRepository$ErrorHandlingModuleComponentRepositoryAccess.tryResolveAndMaybeBlacklist(ErrorHandlingModuleComponentRepository.java:237)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingModuleComponentRepository$ErrorHandlingModuleComponentRepositoryAccess.tryResolveAndMaybeBlacklist(ErrorHandlingModuleComponentRepository.java:222)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingModuleComponentRepository$ErrorHandlingModuleComponentRepositoryAccess.performOperationWithRetries(ErrorHandlingModuleComponentRepository.java:215)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingModuleComponentRepository$ErrorHandlingModuleComponentRepositoryAccess.resolveComponentMetaData(ErrorHandlingModuleComponentRepository.java:153)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ComponentMetaDataResolveState.process(ComponentMetaDataResolveState.java:69)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ComponentMetaDataResolveState.resolve(ComponentMetaDataResolveState.java:48)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver.findBestMatch(RepositoryChainComponentMetaDataResolver.java:139)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver.findBestMatch(RepositoryChainComponentMetaDataResolver.java:120)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver.resolveModule(RepositoryChainComponentMetaDataResolver.java:93)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver.resolve(RepositoryChainComponentMetaDataResolver.java:64)
at org.gradle.api.internal.artifacts.query.DefaultArtifactResolutionQuery.buildComponentResult(DefaultArtifactResolutionQuery.java:172)
at org.gradle.api.internal.artifacts.query.DefaultArtifactResolutionQuery.createResult(DefaultArtifactResolutionQuery.java:150)
at org.gradle.api.internal.artifacts.query.DefaultArtifactResolutionQuery.execute(DefaultArtifactResolutionQuery.java:141)
at org.jetbrains.plugins.gradle.tooling.util.DependencyResolverImpl.resolveDependencies(DependencyResolverImpl.java:207)
at org.jetbrains.plugins.gradle.tooling.util.DependencyResolverImpl.resolveDependencies(DependencyResolverImpl.java:307)
at org.jetbrains.plugins.gradle.tooling.util.DependencyResolver$resolveDependencies.call(Unknown Source)
at org.jetbrains.plugins.gradle.tooling.builder.ExternalProjectBuilderImpl$_getSourceSets_closure6.doCall(ExternalProjectBuilderImpl.groovy:419)
at org.gradle.util.ClosureBackedAction.execute(ClosureBackedAction.java:71)
at org.gradle.util.ConfigureUtil.configureTarget(ConfigureUtil.java:154)
at org.gradle.util.ConfigureUtil.configure(ConfigureUtil.java:105)
at org.gradle.util.ConfigureUtil$WrappedConfigureAction.execute(ConfigureUtil.java:166)
at org.gradle.api.internal.DefaultDomainObjectCollection.all(DefaultDomainObjectCollection.java:163)
at org.gradle.api.internal.DefaultDomainObjectCollection.all(DefaultDomainObjectCollection.java:198)
at org.gradle.api.DomainObjectCollection$all.call(Unknown Source)
at org.jetbrains.plugins.gradle.tooling.builder.ExternalProjectBuilderImpl.getSourceSets(ExternalProjectBuilderImpl.groovy:239)
at org.jetbrains.plugins.gradle.tooling.builder.ExternalProjectBuilderImpl.doBuild(ExternalProjectBuilderImpl.groovy:104)
at org.jetbrains.plugins.gradle.tooling.builder.ExternalProjectBuilderImpl.buildAll(ExternalProjectBuilderImpl.groovy:63)
at org.jetbrains.plugins.gradle.tooling.internal.ExtraModelBuilder.buildAll(ExtraModelBuilder.java:67)
at org.gradle.tooling.provider.model.internal.DefaultToolingModelBuilderRegistry$BuildOperationWrappingToolingModelBuilder$1$1.create(DefaultToolingModelBuilderRegistry.java:104)
at org.gradle.api.internal.project.DefaultProjectStateRegistry.withLenientState(DefaultProjectStateRegistry.java:134)
at org.gradle.tooling.provider.model.internal.DefaultToolingModelBuilderRegistry$BuildOperationWrappingToolingModelBuilder$1.call(DefaultToolingModelBuilderRegistry.java:100)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102)
at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
at org.gradle.tooling.provider.model.internal.DefaultToolingModelBuilderRegistry$BuildOperationWrappingToolingModelBuilder.buildAll(DefaultToolingModelBuilderRegistry.java:97)
at org.gradle.tooling.internal.provider.runner.DefaultBuildController.getModel(DefaultBuildController.java:82)
at org.gradle.tooling.internal.consumer.connection.InternalBuildActionAdapter$2.getModel(InternalBuildActionAdapter.java:77)
at org.gradle.tooling.internal.consumer.connection.BuildControllerAdapter.getModel(BuildControllerAdapter.java:62)
at org.gradle.tooling.internal.consumer.connection.AbstractBuildController.findModel(AbstractBuildController.java:57)
at org.gradle.tooling.internal.consumer.connection.AbstractBuildController.findModel(AbstractBuildController.java:44)
at org.jetbrains.plugins.gradle.model.ProjectImportAction.addExtraProject(ProjectImportAction.java:134)
at org.jetbrains.plugins.gradle.model.ProjectImportAction.execute(ProjectImportAction.java:76)
at org.jetbrains.plugins.gradle.model.ProjectImportAction.execute(ProjectImportAction.java:40)
at org.gradle.tooling.internal.consumer.connection.InternalBuildActionAdapter.execute(InternalBuildActionAdapter.java:80)
at org.gradle.tooling.internal.provider.runner.ClientProvidedBuildActionRunner$ResultBuildingListener.buildResult(ClientProvidedBuildActionRunner.java:114)
at org.gradle.tooling.internal.provider.runner.ClientProvidedBuildActionRunner$ResultBuildingListener.buildFinished(ClientProvidedBuildActionRunner.java:106)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:382)
at org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:364)
at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:58)
at org.gradle.internal.event.DefaultListenerManager$EventBroadcast$ListenerDispatch.dispatch(DefaultListenerManager.java:352)
at org.gradle.internal.event.DefaultListenerManager$EventBroadcast$ListenerDispatch.dispatch(DefaultListenerManager.java:339)
at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:42)
at org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:231)
at org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:150)
at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:58)
... 80 more

Andrey Dernov  it says "failed to notify build listener". Please how can I resolve this issue.

Caused by: java.lang.AbstractMethodError
at org.gradle.api.internal.artifacts.ivyservice.resolutionstrategy.DefaultCachePolicy.mustRefreshModule(DefaultCachePolicy.java:219)

This looks like incompatible Gradle and plugins version used. Check the https://stackoverflow.com/a/53820048/2000323

Please create new thread for separate issue next time. Thanks.