Error when importing LibGDX gradle project - eclipse

I have been trying to play around with the libgdx framework. I'm following this book called "LibGDX Game development essentials" by Juwal Bose.
The book recommended checking out some game demos libGDX made available. I downloaded this one: github.com/badlogic/theplanethatcouldntflygood.
I tried importing it to eclipse through gradle and during the import preview this message appeared:
Loading Gradle project preview failed due to an error in the referenced Gradle build.
Could not fetch model of type 'GradleBuild' using Gradle distribution 'http://services.gradle.org/distributions/gradle-2.10-all.zip'.
A problem occurred configuring project ':android'.
failed to find target with hash string 'android-20' in: C:\Users\Daniel\android-sdks
Details:
org.gradle.tooling.BuildException: Could not fetch model of type 'GradleBuild' using Gradle distribution 'http://services.gradle.org/distributions/gradle-2.10-all.zip'.
at org.gradle.tooling.internal.consumer.ExceptionTransformer.transform(ExceptionTransformer.java:51)
at org.gradle.tooling.internal.consumer.ExceptionTransformer.transform(ExceptionTransformer.java:29)
at org.gradle.tooling.internal.consumer.ResultHandlerAdapter.onFailure(ResultHandlerAdapter.java:41)
at org.gradle.tooling.internal.consumer.async.DefaultAsyncConsumerActionExecutor$1$1.run(DefaultAsyncConsumerActionExecutor.java:57)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
at org.gradle.tooling.internal.consumer.BlockingResultHandler.getResult(BlockingResultHandler.java:46)
at org.gradle.tooling.internal.consumer.DefaultModelBuilder.get(DefaultModelBuilder.java:51)
at com.gradleware.tooling.toolingclient.internal.DefaultToolingClient.executeAndWait(DefaultToolingClient.java:106)
at com.gradleware.tooling.toolingclient.internal.DefaultModelRequest.executeAndWait(DefaultModelRequest.java:79)
at com.gradleware.tooling.toolingmodel.repository.internal.BaseModelRepository$1.get(BaseModelRepository.java:95)
at com.gradleware.tooling.toolingmodel.repository.internal.BaseModelRepository.executeAndWait(BaseModelRepository.java:163)
at com.gradleware.tooling.toolingmodel.repository.internal.BaseModelRepository.access$000(BaseModelRepository.java:41)
at com.gradleware.tooling.toolingmodel.repository.internal.BaseModelRepository$2.call(BaseModelRepository.java:121)
at com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4724)
at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3522)
at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2315)
at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2278)
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2193)
at com.google.common.cache.LocalCache.get(LocalCache.java:3932)
at com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4721)
at com.gradleware.tooling.toolingmodel.repository.internal.BaseModelRepository.getFromCache(BaseModelRepository.java:138)
at com.gradleware.tooling.toolingmodel.repository.internal.BaseModelRepository.executeRequest(BaseModelRepository.java:117)
at com.gradleware.tooling.toolingmodel.repository.internal.BaseModelRepository.executeRequest(BaseModelRepository.java:88)
at com.gradleware.tooling.toolingmodel.repository.internal.DefaultSingleBuildModelRepository.fetchGradleBuildStructure(DefaultSingleBuildModelRepository.java:132)
at org.eclipse.buildship.core.projectimport.ProjectPreviewJob.fetchGradleBuildStructure(ProjectPreviewJob.java:94)
at org.eclipse.buildship.core.projectimport.ProjectPreviewJob.runToolingApiJobInWorkspace(ProjectPreviewJob.java:83)
at org.eclipse.buildship.core.util.progress.ToolingApiWorkspaceJob$1.run(ToolingApiWorkspaceJob.java:79)
at org.eclipse.buildship.core.util.progress.ToolingApiInvoker.invoke(ToolingApiInvoker.java:63)
at org.eclipse.buildship.core.util.progress.ToolingApiWorkspaceJob.runInWorkspace(ToolingApiWorkspaceJob.java:76)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:39)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: org.gradle.internal.exceptions.LocationAwareException: A problem occurred configuring project ':android'.
at org.gradle.initialization.DefaultExceptionAnalyser.transform(DefaultExceptionAnalyser.java:74)
at org.gradle.initialization.MultipleBuildFailuresExceptionAnalyser.transform(MultipleBuildFailuresExceptionAnalyser.java:47)
at org.gradle.initialization.StackTraceSanitizingExceptionAnalyser.transform(StackTraceSanitizingExceptionAnalyser.java:30)
at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:101)
at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:93)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:62)
at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:93)
at org.gradle.initialization.DefaultGradleLauncher.getBuildAnalysis(DefaultGradleLauncher.java:87)
at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.configure(InProcessBuildActionExecuter.java:102)
at org.gradle.tooling.internal.provider.runner.BuildModelActionRunner.run(BuildModelActionRunner.java:48)
at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
at org.gradle.tooling.internal.provider.runner.SubscribableBuildActionRunner.run(SubscribableBuildActionRunner.java:58)
at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:43)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:28)
I have put a local.properties file in the root directory of the project indicating the SDK folder. So this is not the problem.
I downloaded version 20 of the Android SDK, with no success.
I have tried reinstalling gradle.
I tried out importing another demo from their git resulting in a very similar error:
Loading Gradle project preview failed due to an error connecting to
the Gradle build. Could not fetch model of type 'GradleBuild' using
Gradle distribution
'services.gradle.org/distributions/gradle-2.2-all.zip'.
A problem occurred configuring project ':android'. failed to find
target with hash string 'android-20' in: C:\Users\Daniel\android-sdks
org.gradle.tooling.GradleConnectionException: Could not fetch model of
type 'GradleBuild' using Gradle distribution
'services.gradle.org/distributions/gradle-2.2-all.zip'.

As suspected, the gradle version in use (2.10) was too old to handle the task, thus upgrading the Eclipse plugin with this link has solved the issue when using gradle with Eclipse.

Related

Eclipse is not adding any files to new gradle projects

I'm currently trying to set up a Gradle project in the Eclipse IDE, with JDK 19, Gradle 7.6, and Buildship, on a fresh install of the Eclipse IDE. When I try and create a new gradle project from the "new -> project..." dialog, the gradle build wizard pops up, but after creating the project it only creates a folder with no files in it -- no build.gradle, no Java library, nothing. I've tried making a regular Java project, and that works, so it seems to be something specifically wrong with either my Gradle or Buildship installation, but I have no idea what it could be. I've tried doing a fresh install of both Buildship and Gradle 7.6, and it doesn't seem to help.
The only thing I have to go on is that there seems to be issues connecting to the Gradle build. One of the errors from the error log is shown below:
org.gradle.tooling.GradleConnectionException: Could not execute build using connection to Gradle distribution 'https://services.gradle.org/distributions/gradle-7.4.2-bin.zip'.
at org.gradle.tooling.internal.consumer.ExceptionTransformer.transform(ExceptionTransformer.java:55)
at org.gradle.tooling.internal.consumer.ExceptionTransformer.transform(ExceptionTransformer.java:29)
at org.gradle.tooling.internal.consumer.ResultHandlerAdapter.onFailure(ResultHandlerAdapter.java:43)
at org.gradle.tooling.internal.consumer.async.DefaultAsyncConsumerActionExecutor$1$1.run(DefaultAsyncConsumerActionExecutor.java:69)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
at java.base/java.lang.Thread.run(Thread.java:1589)
at org.gradle.tooling.internal.consumer.BlockingResultHandler.getResult(BlockingResultHandler.java:46)
at org.gradle.tooling.internal.consumer.DefaultBuildLauncher.run(DefaultBuildLauncher.java:83)
at org.eclipse.buildship.core.internal.workspace.InitializeNewProjectOperation.initProjectIfNotExists(InitializeNewProjectOperation.java:60)
at org.eclipse.buildship.core.internal.workspace.InitializeNewProjectOperation.runInToolingApi(InitializeNewProjectOperation.java:45)
at org.eclipse.buildship.core.internal.operation.DefaultToolingApiOperationManager$WorkspaceRunnableAdapter.run(DefaultToolingApiOperationManager.java:58)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2380)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2405)
at org.eclipse.buildship.core.internal.operation.DefaultToolingApiOperationManager.run(DefaultToolingApiOperationManager.java:39)
at org.eclipse.buildship.core.internal.operation.DefaultToolingApiOperationManager.run(DefaultToolingApiOperationManager.java:33)
at org.eclipse.buildship.ui.internal.wizard.project.ProjectImportWizardController$5.run(ProjectImportWizardController.java:208)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
Caused by: org.gradle.internal.jvm.JavaHomeException: The supplied javaHome seems to be invalid. I cannot find the java executable. Tried location: C:\Program Files\Java\jdk-19\bin\java.exe
at org.gradle.internal.jvm.Jvm.findExecutable(Jvm.java:183)
at org.gradle.internal.jvm.Jvm.getJavaExecutable(Jvm.java:208)
at org.gradle.internal.jvm.Jvm.forHome(Jvm.java:119)
at org.gradle.launcher.daemon.context.DaemonCompatibilitySpec.javaHomeMatches(DaemonCompatibilitySpec.java:64)
at org.gradle.launcher.daemon.context.DaemonCompatibilitySpec.whyUnsatisfied(DaemonCompatibilitySpec.java:40)
at org.gradle.launcher.daemon.context.DaemonCompatibilitySpec.isSatisfiedBy(DaemonCompatibilitySpec.java:35)
at org.gradle.launcher.daemon.context.DaemonCompatibilitySpec.isSatisfiedBy(DaemonCompatibilitySpec.java:25)
at org.gradle.launcher.daemon.client.DefaultDaemonConnector.getCompatibleDaemons(DefaultDaemonConnector.java:192)
at org.gradle.launcher.daemon.client.DefaultDaemonConnector.connectToIdleDaemon(DefaultDaemonConnector.java:157)
at org.gradle.launcher.daemon.client.DefaultDaemonConnector.connect(DefaultDaemonConnector.java:125)
at org.gradle.launcher.daemon.client.DaemonClient.execute(DaemonClient.java:145)
at org.gradle.launcher.daemon.client.DaemonClient.execute(DaemonClient.java:99)
at org.gradle.tooling.internal.provider.DaemonBuildActionExecuter.execute(DaemonBuildActionExecuter.java:44)
at org.gradle.tooling.internal.provider.DaemonBuildActionExecuter.execute(DaemonBuildActionExecuter.java:30)
at org.gradle.tooling.internal.provider.LoggingBridgingBuildActionExecuter.execute(LoggingBridgingBuildActionExecuter.java:60)
at org.gradle.tooling.internal.provider.LoggingBridgingBuildActionExecuter.execute(LoggingBridgingBuildActionExecuter.java:37)
at org.gradle.tooling.internal.provider.ProviderConnection.run(ProviderConnection.java:222)
at org.gradle.tooling.internal.provider.ProviderConnection.run(ProviderConnection.java:148)
at org.gradle.tooling.internal.provider.DefaultConnection.getModel(DefaultConnection.java:202)
at org.gradle.tooling.internal.consumer.connection.CancellableModelBuilderBackedModelProducer.produceModel(CancellableModelBuilderBackedModelProducer.java:54)
at org.gradle.tooling.internal.consumer.connection.PluginClasspathInjectionSupportedCheckModelProducer.produceModel(PluginClasspathInjectionSupportedCheckModelProducer.java:38)
at org.gradle.tooling.internal.consumer.connection.AbstractConsumerConnection.run(AbstractConsumerConnection.java:64)
at org.gradle.tooling.internal.consumer.connection.ParameterValidatingConsumerConnection.run(ParameterValidatingConsumerConnection.java:49)
at org.gradle.tooling.internal.consumer.DefaultBuildLauncher$1.run(DefaultBuildLauncher.java:97)
at org.gradle.tooling.internal.consumer.DefaultBuildLauncher$1.run(DefaultBuildLauncher.java:89)
at org.gradle.tooling.internal.consumer.connection.LazyConsumerActionExecutor.run(LazyConsumerActionExecutor.java:143)
at org.gradle.tooling.internal.consumer.connection.CancellableConsumerActionExecutor.run(CancellableConsumerActionExecutor.java:45)
at org.gradle.tooling.internal.consumer.connection.ProgressLoggingConsumerActionExecutor.run(ProgressLoggingConsumerActionExecutor.java:61)
at org.gradle.tooling.internal.consumer.connection.RethrowingErrorsConsumerActionExecutor.run(RethrowingErrorsConsumerActionExecutor.java:38)
at org.gradle.tooling.internal.consumer.async.DefaultAsyncConsumerActionExecutor$1$1.run(DefaultAsyncConsumerActionExecutor.java:67)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
So my best guess is that my Java Home is wrong, but all the documentation I can find online says it's set right. So I have no idea how to fix this.

Import a Play Framework project to IntelliJ 14.1.5 Error

Problem:
IntelliJ is not letting me import a play framework project. It just displays errors when I try to open project using SBT.
Its really simple what I want to do, but I haven't used any of these tools and I'm a bit lost at how to fix this.
I just want to create a Play framework project, and edit it in IntelliJ as shown on multiple tutorials on youtube.
Below I have provided some info about how I have tried to make it work to "help you help me".
I really hope there is some easy solution that I fail to see!
Background info:
I have downloaded and installed IntelliJ 14.1.5 Community Edition and the latest avtivator from Play Framework - Activator 1.3.6 and Play 2.4.3
Note: I also downloaded the latest java jdk, 1.8.0_65 and added both java and activator to path - I'm using Windows 8. I have also downloaded the latest plugin of Scala inside IntelliJ
Then I opened cmd and typed "activator ui" and opened browser at localhost:8888 as instructed in tutorials. I managed to create a "play-java-intro" project. So far, so good.
After this I have tried a few different approaches.
NOTE: I have clicked "Invalidate cache / restart" each time I try something new
First try
I tried to Open project after I had created the project through activator. I selected root directory of the project and selected SDK jdk 1.7 (have tried with 1.8 aswell).
I got the error
Error while importing SBT project: ... at
sbt.MainLoop$$anonfun$runWithNewLog$1.apply(MainLoop.scala:70) at sbt.MainLoop$$anonfun$runWithNewLog$1.apply(MainLoop.scala:65) at sbt.Using.apply(Using.scala:24) at sbt.MainLoop$.runWithNewLog(MainLoop.scala:65) at sbt.MainLoop$.runAndClearLast(MainLoop.scala:48) at sbt.MainLoop$.runLoggedLoop(MainLoop.scala:32) at sbt.MainLoop$.runLogged(MainLoop.scala:24) at sbt.StandardMain$.runManaged(Main.scala:53) at sbt.xMain.run(Main.scala:28) at xsbt.boot.Launch$$anonfun$run$1.apply(Launch.scala:109) at xsbt.boot.Launch$.withContextLoader(Launch.scala:129) at xsbt.boot.Launch$.run(Launch.scala:109) at xsbt.boot.Launch$$anonfun$apply$1.apply(Launch.scala:36) at xsbt.boot.Launch$.launch(Launch.scala:117) at xsbt.boot.Launch$.apply(Launch.scala:19) at xsbt.boot.Boot$.runImpl(Boot.scala:44) at xsbt.boot.Boot$.main(Boot.scala:20) at xsbt.boot.Boot.main(Boot.scala) [error] java.lang.UnsupportedClassVersionError: com/typesafe/config/ConfigException : Unsupported major.minor version 52.0 [error] Use 'last' for the full log.
Inside the log file:
[info] Loading project definition from C:\play-java-intro\project
[info] Set current project to play-java-intro (in build file:/C:/play-java-intro/)
java.lang.UnsupportedClassVersionError: com/typesafe/config/ConfigException : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at com.typesafe.sbt.web.SbtWeb$$anonfun$com$typesafe$sbt$web$SbtWeb$$load$1.apply(SbtWeb.scala:535)
at com.typesafe.sbt.web.SbtWeb$$anonfun$com$typesafe$sbt$web$SbtWeb$$load$1.apply(SbtWeb.scala:535)
at scala.Option.fold(Option.scala:157)
at com.typesafe.sbt.web.SbtWeb$.com$typesafe$sbt$web$SbtWeb$$load(SbtWeb.scala:549)
at com.typesafe.sbt.web.SbtWeb$$anonfun$globalSettings$1$$anonfun$apply$1.apply(SbtWeb.scala:143)
at com.typesafe.sbt.web.SbtWeb$$anonfun$globalSettings$1$$anonfun$apply$1.apply(SbtWeb.scala:143)
at scala.Function1$$anonfun$andThen$1.apply(Function1.scala:55)
at sbt.Project$.setProject(Project.scala:319)
at sbt.BuiltinCommands$.doLoadProject(Main.scala:484)
at sbt.BuiltinCommands$$anonfun$loadProjectImpl$2.apply(Main.scala:475)
at sbt.BuiltinCommands$$anonfun$loadProjectImpl$2.apply(Main.scala:475)
at sbt.Command$$anonfun$applyEffect$1$$anonfun$apply$2.apply(Command.scala:58)
at sbt.Command$$anonfun$applyEffect$1$$anonfun$apply$2.apply(Command.scala:58)
at sbt.Command$$anonfun$applyEffect$2$$anonfun$apply$3.apply(Command.scala:60)
at sbt.Command$$anonfun$applyEffect$2$$anonfun$apply$3.apply(Command.scala:60)
at sbt.Command$.process(Command.scala:92)
at sbt.MainLoop$$anonfun$1$$anonfun$apply$1.apply(MainLoop.scala:98)
at sbt.MainLoop$$anonfun$1$$anonfun$apply$1.apply(MainLoop.scala:98)
at sbt.State$$anon$1.process(State.scala:184)
at sbt.MainLoop$$anonfun$1.apply(MainLoop.scala:98)
at sbt.MainLoop$$anonfun$1.apply(MainLoop.scala:98)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
at sbt.MainLoop$.next(MainLoop.scala:98)
at sbt.MainLoop$.run(MainLoop.scala:91)
at sbt.MainLoop$$anonfun$runWithNewLog$1.apply(MainLoop.scala:70)
at sbt.MainLoop$$anonfun$runWithNewLog$1.apply(MainLoop.scala:65)
at sbt.Using.apply(Using.scala:24)
at sbt.MainLoop$.runWithNewLog(MainLoop.scala:65)
at sbt.MainLoop$.runAndClearLast(MainLoop.scala:48)
at sbt.MainLoop$.runLoggedLoop(MainLoop.scala:32)
at sbt.MainLoop$.runLogged(MainLoop.scala:24)
at sbt.StandardMain$.runManaged(Main.scala:53)
at sbt.xMain.run(Main.scala:28)
at xsbt.boot.Launch$$anonfun$run$1.apply(Launch.scala:109)
at xsbt.boot.Launch$.withContextLoader(Launch.scala:129)
at xsbt.boot.Launch$.run(Launch.scala:109)
at xsbt.boot.Launch$$anonfun$apply$1.apply(Launch.scala:36)
at xsbt.boot.Launch$.launch(Launch.scala:117)
at xsbt.boot.Launch$.apply(Launch.scala:19)
at xsbt.boot.Boot$.runImpl(Boot.scala:44)
at xsbt.boot.Boot$.main(Boot.scala:20)
at xsbt.boot.Boot.main(Boot.scala)
[error] java.lang.UnsupportedClassVersionError: com/typesafe/config/ConfigException : Unsupported major.minor version 52.0
[error] Use 'last' for the full log.
I have tried to search what this means, but the answers I find on google wont apply to my problem.
I have tried to select and deselect all of the options within SBT - Use auto-import, Download sources and docs etc.. But still the same error message.
Second try
Similar to first try, but I clicked "Create IntelliJ project" inside activator at localhost:8888 and then tried to import the project the same method as First try.
Third try
Open project and select the root directory, and I managed to import the project somewhat, but its moved project files to "project backup" and I got lots of warnings saying its based on a outdated version. Didn't quite understand this.
Fourth try
Create project from existing sources after creating the project at activator, and I got the project imported without warnings.
But when I open Application.java (or any other file for that matter), everything inside that file gets red underlined with a error saying similar to "Cannot resolve symbol 'Result'" and I cant compile anything.
I have tried to open modules and click + and add Scala as a module, but it doesn't seem to make any difference.
I really hope there is someone out there that can help me as this should be a fairly easy thing to install IntelliJ + Play framework.
The issue is that even if IntelliJ is set to use JDK8, the SBT process is using JDK7 (you can confirm that looking at it with a tool like JVisualVM). Not sure what their logic is to pick up SBT's JVM, but you can force it when you import the projet:
This solved it for me with this version of Idea:
From the documentation: https://www.playframework.com/documentation/2.4.x/Highlights24
Play 2.4 now requires JDK 8
So you definitely must use only JDK 8.
Unsupported major.minor version 52.0
Means that you try to open project that was compiled with JDK 8 but your settings in IDE is JDK 7 (or less)
My proposition - check twice if you really use JDK8 in the intelliJ

Push to Upstream to Heroku server from Eclipse failed

I was able to commit the change but when i do push to upstream this is the message i get:
Repository git#heroku.com:protected-garden-XXXX.git
pre-receive hook declined
Compressing source files... done.
Building source:
-----> Java app detected
-----> Installing OpenJDK 1.6... done
-----> Installing Maven 3.3.1... done
-----> Executing: mvn -B -DskipTests=true clean install
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/maven/cli/MavenCli : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:401)
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42)
at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:254)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
at org.codehaus.plexus.classworlds.launcher.Launcher.getMainClass(Launcher.java:144)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:266)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
! ERROR: Failed to build app with Maven
We're sorry this build is failing! If you can't find the issue in application code,
please submit a ticket so we can help: https://help.heroku.com/
! Push rejected, failed to compile Java app
Verifying deploy...
! Push rejected to protected-garden-XXXX.
What might be the problem because I used the default example Eclipse >>> Project >>> :"Create Heroku App from Template" and chose the Embedded Jetty-Servlet Application and just changed the text in the HelloServlet line 20 and then commit.
Answer from heroku support team: (which solved my problem)
Maven 3, which Heroku uses to build projects with a pom.xml file, will not run on any version of Java 6. It requires Java 7 or later. Personally, I'd suggest going straight to the latest version, Java 8, since Java 7 is no longer supported by Oracle or the OpenJDK team.
You can upgrade Java in your app by specifying
java.runtime.version=1.8
in the:
system.properties
file in the root of your project, then pushing your app. You'll also want to install the same version of Java locally, so that you can test your app before you push it.

Unable to register extension org.sonar.plugins.scala.cobertura.CoberturaSensor

I am using SonarQube 5.1 and its running on localhost. It was working out of box for java, but when i added the plugin for scala - http://docs.codehaus.org/display/SONAR/Scala+Plugin (i checked out the code from github, build the jar and then installed in sonarqube installation), now every time i invoke the gradle command sonarRunner - I am getting this error:
19:52:55.232 [ERROR] [system.err] ERROR: Unable to execute Sonar
19:52:55.233 [ERROR] [system.err] ERROR: Caused by: Unable to register extension org.sonar.plugins.scala.cobertura.CoberturaSensor
19:52:55.233 [ERROR] [system.err] ERROR: Caused by: org/sonar/plugins/cobertura/api/AbstractCoberturaParser
19:52:55.233 [ERROR] [system.err] ERROR: Caused by: org.sonar.plugins.cobertura.api.AbstractCoberturaParser
I tried searching for cause of the issue but could not find anything online. Please help me.
It took me about a million years to find this, so I hope it's helpful to someone. This error is caused by updates to the sonar api that cause incompatibility with versions older than 4.5.
The solution is to use the updated version of the sonar scala plugin which is available here: https://github.com/1and1/sonar-scala
This built straight away for me and started analyzing scala without error.
There are several things you can update in your project and on your Sonar server.
Go to your SonarQube Update Center
Go to Administration -> System -> Update Center
Update the CorberturaSenor plugin
As per this screenshot, find the specific plugin you are using and click update if available(This screenshot is showing a findbugs plugin but it will be the same concept for CorberturaSenor).
Update sonarqube dependency in your project
This example is in Gradle:
dependencies {
classpath "org.sonarsource.scanner.gradle:sonarqube-gradle-plugin:2.1-rc1"
}
Update sonar version
This example is in Gradle
sonarqube {
version='2.1-rc1'
}
Update your CoberturaSensor plugin dependency in your project.
Get the fully qualified name of your dependency you are using and search for a new version. Then update it in your build tool.
Check here for more info on this error: Unable to register extension org.sonar.plugins.*

InconsistenProjectHierarchyException

I have a project with sub-projects (https://github.com/i23098/Collections) that compiles correctly on the command-line. When I try to import the project in Eclipse I get an error and tells me to check the log... Checking it, it has:
!ENTRY org.springsource.ide.eclipse.gradle.core 4 0 2014-11-09 17:03:13.404
!MESSAGE Gradle project hierarchy is inconsistent for '/home/ralmeida/workspace-collections/Collections'
!STACK 0
java.lang.reflect.InvocationTargetException
at org.springsource.ide.eclipse.gradle.core.util.GradleRunnable.run(GradleRunnable.java:113)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
Caused by: org.springsource.ide.eclipse.gradle.core.InconsistenProjectHierarchyException: Gradle project hierarchy is inconsistent for '/home/ralmeida/workspace-collections/Collections'
at org.springsource.ide.eclipse.gradle.core.util.ExceptionUtil.inconsistentProjectHierachy(ExceptionUtil.java:82)
at org.springsource.ide.eclipse.gradle.core.GradleModelProvider$GroupedModelProvider.getCachedModel(GradleModelProvider.java:339)
at org.springsource.ide.eclipse.gradle.core.GradleProject.getGradleModel(GradleProject.java:634)
at org.springsource.ide.eclipse.gradle.core.GradleProject.getSkeletalGradleModel(GradleProject.java:653)
at org.springsource.ide.eclipse.gradle.ui.wizards.GradleImportWizardPageOne$11.doit(GradleImportWizardPageOne.java:516)
at org.springsource.ide.eclipse.gradle.core.util.GradleRunnable.run(GradleRunnable.java:105)
... 1 more
Root exception:
org.springsource.ide.eclipse.gradle.core.InconsistenProjectHierarchyException: Gradle project hierarchy is inconsistent for '/home/ralmeida/workspace-collections/Collections'
at org.springsource.ide.eclipse.gradle.core.util.ExceptionUtil.inconsistentProjectHierachy(ExceptionUtil.java:82)
at org.springsource.ide.eclipse.gradle.core.GradleModelProvider$GroupedModelProvider.getCachedModel(GradleModelProvider.java:339)
at org.springsource.ide.eclipse.gradle.core.GradleProject.getGradleModel(GradleProject.java:634)
at org.springsource.ide.eclipse.gradle.core.GradleProject.getSkeletalGradleModel(GradleProject.java:653)
at org.springsource.ide.eclipse.gradle.ui.wizards.GradleImportWizardPageOne$11.doit(GradleImportWizardPageOne.java:516)
at org.springsource.ide.eclipse.gradle.core.util.GradleRunnable.run(GradleRunnable.java:105)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
Eclipse IDE for Java EE Developers 4.4.1.20140925-1820
Gradle IDE 3.6.2.201410090835-RELEASE (configured to use gradle wrapper at http://services.gradle.org/distributions/gradle-2.1-bin.zip)
Any ideas?
I just spontaneously ran into this problem myself with a working project. After a bit of investigation, I found that an incorrect value was written into file:
projectDir/.settings/gradle/org.springsource.ide.eclipse.gradle.core.prefs
for the key:
org.springsource.ide.eclipse.gradle.rootprojectloc=
I found simply deleting the bogus value corrected the problem in my case