So I’ve been learning Java and thought I’d try and follow along a YouTube tutorial to make flappy bird using libGDX and Android Studio. I’m on part 9 currently and I think I have everything correct so far but now when I attempt to run the application it opens to the menu state and when I click to change to the play state it stops responding. I’ll provide the error message I got with stacktrace below
Cannot locate tasks that match ‘:desktop:DesktopLauncher.main()’ as task ‘DesktopLauncher.main()’ not found in project ‘:desktop’.
and the exception here
Exception is:
org.gradle.execution.TaskSelectionException: Cannot locate tasks that match ‘:desktop:DesktopLauncher.main()’ as task ‘DesktopLauncher.main()’ not found in project ‘:desktop’.
at org.gradle.execution.DefaultTaskSelector.lambda$throwTaskSelectionException$1(DefaultTaskSelector.java:105)
at org.gradle.api.problems.internal.DefaultProblemReporter.throwing(DefaultProblemReporter.java:48)
at org.gradle.execution.DefaultTaskSelector.throwTaskSelectionException(DefaultTaskSelector.java:101)
at org.gradle.execution.DefaultTaskSelector.getSelection(DefaultTaskSelector.java:86)
at org.gradle.execution.selection.DefaultBuildTaskSelector.resolveTaskName(DefaultBuildTaskSelector.java:98)
at org.gradle.execution.commandline.CommandLineTaskParser.parseTasks(CommandLineTaskParser.java:49)
at org.gradle.execution.TaskNameResolvingBuildTaskScheduler.scheduleRequestedTasks(TaskNameResolvingBuildTaskScheduler.java:51)
at org.gradle.execution.DefaultTasksBuildTaskScheduler.scheduleRequestedTasks(DefaultTasksBuildTaskScheduler.java:72)
at org.gradle.initialization.DefaultTaskExecutionPreparer.lambda$scheduleRequestedTasks$0(DefaultTaskExecutionPreparer.java:46)
at org.gradle.internal.Factories$1.create(Factories.java:31)
at org.gradle.internal.work.DefaultWorkerLeaseService.withReplacedLocks(DefaultWorkerLeaseService.java:360)
at org.gradle.api.internal.project.DefaultProjectStateRegistry$DefaultBuildProjectRegistry.withMutableStateOfAllProjects(DefaultProjectStateRegistry.java:240)
at org.gradle.api.internal.project.DefaultProjectStateRegistry$DefaultBuildProjectRegistry.withMutableStateOfAllProjects(DefaultProjectStateRegistry.java:233)
at org.gradle.initialization.DefaultTaskExecutionPreparer.scheduleRequestedTasks(DefaultTaskExecutionPreparer.java:45)
at org.gradle.initialization.VintageBuildModelController.lambda$scheduleRequestedTasks$0(VintageBuildModelController.java:76)
at org.gradle.internal.model.StateTransitionController.lambda$inState$1(StateTransitionController.java:99)
at org.gradle.internal.model.StateTransitionController.lambda$inState$2(StateTransitionController.java:114)
at org.gradle.internal.work.DefaultSynchronizer.withLock(DefaultSynchronizer.java:44)
at org.gradle.internal.model.StateTransitionController.inState(StateTransitionController.java:110)
at org.gradle.internal.model.StateTransitionController.inState(StateTransitionController.java:98)
at org.gradle.initialization.VintageBuildModelController.scheduleRequestedTasks(VintageBuildModelController.java:76)
at org.gradle.internal.build.DefaultBuildLifecycleController$DefaultWorkGraphBuilder.addRequestedTasks(DefaultBuildLifecycleController.java:404)
at org.gradle.internal.buildtree.DefaultBuildTreeWorkPreparer.lambda$scheduleRequestedTasks$0(DefaultBuildTreeWorkPreparer.java:41)
at org.gradle.internal.build.DefaultBuildLifecycleController.lambda$populateWorkGraph$7(DefaultBuildLifecycleController.java:189)
at org.gradle.internal.build.DefaultBuildWorkPreparer.populateWorkGraph(DefaultBuildWorkPreparer.java:42)
at org.gradle.internal.build.BuildOperationFiringBuildWorkPreparer$PopulateWorkGraph.populateTaskGraph(BuildOperationFiringBuildWorkPreparer.java:106)
at org.gradle.internal.build.BuildOperationFiringBuildWorkPreparer$PopulateWorkGraph.run(BuildOperationFiringBuildWorkPreparer.java:92)
at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:29)
at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:26)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.run(DefaultBuildOperationRunner.java:47)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:68)
at org.gradle.internal.build.BuildOperationFiringBuildWorkPreparer.populateWorkGraph(BuildOperationFiringBuildWorkPreparer.java:67)
at org.gradle.internal.build.DefaultBuildLifecycleController.lambda$populateWorkGraph$8(DefaultBuildLifecycleController.java:189)
at org.gradle.internal.model.StateTransitionController.lambda$inState$1(StateTransitionController.java:99)
at org.gradle.internal.model.StateTransitionController.lambda$inState$2(StateTransitionController.java:114)
at org.gradle.internal.work.DefaultSynchronizer.withLock(DefaultSynchronizer.java:44)
at org.gradle.internal.model.StateTransitionController.inState(StateTransitionController.java:110)
at org.gradle.internal.model.StateTransitionController.inState(StateTransitionController.java:98)
at org.gradle.internal.build.DefaultBuildLifecycleController.populateWorkGraph(DefaultBuildLifecycleController.java:189)
at org.gradle.internal.build.DefaultBuildWorkGraphController$DefaultBuildWorkGraph.populateWorkGraph(DefaultBuildWorkGraphController.java:169)
at org.gradle.composite.internal.DefaultBuildController.populateWorkGraph(DefaultBuildController.java:76)
at org.gradle.composite.internal.DefaultIncludedBuildTaskGraph$DefaultBuildTreeWorkGraphBuilder.withWorkGraph(DefaultIncludedBuildTaskGraph.java:153)
at org.gradle.internal.buildtree.DefaultBuildTreeWorkPreparer.lambda$scheduleRequestedTasks$1(DefaultBuildTreeWorkPreparer.java:41)
at org.gradle.composite.internal.DefaultIncludedBuildTaskGraph$DefaultBuildTreeWorkGraph$1.run(DefaultIncludedBuildTaskGraph.java:209)
at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:29)
at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:26)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.run(DefaultBuildOperationRunner.java:47)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:68)
at org.gradle.composite.internal.DefaultIncludedBuildTaskGraph$DefaultBuildTreeWorkGraph.scheduleWork(DefaultIncludedBuildTaskGraph.java:204)
at org.gradle.internal.buildtree.DefaultBuildTreeWorkPreparer.scheduleRequestedTasks(DefaultBuildTreeWorkPreparer.java:37)
at org.gradle.configurationcache.VintageBuildTreeWorkController$scheduleAndRunRequestedTasks$1.apply(VintageBuildTreeWorkController.kt:36)
at org.gradle.configurationcache.VintageBuildTreeWorkController$scheduleAndRunRequestedTasks$1.apply(VintageBuildTreeWorkController.kt:35)
at org.gradle.composite.internal.DefaultIncludedBuildTaskGraph.withNewWorkGraph(DefaultIncludedBuildTaskGraph.java:112)
at org.gradle.configurationcache.VintageBuildTreeWorkController.scheduleAndRunRequestedTasks(VintageBuildTreeWorkController.kt:35)
at org.gradle.internal.buildtree.DefaultBuildTreeLifecycleController.lambda$scheduleAndRunTasks$1(DefaultBuildTreeLifecycleController.java:76)
at org.gradle.internal.buildtree.DefaultBuildTreeLifecycleController.lambda$runBuild$4(DefaultBuildTreeLifecycleController.java:119)
at org.gradle.internal.model.StateTransitionController.lambda$transition$6(StateTransitionController.java:169)
at org.gradle.internal.model.StateTransitionController.doTransition(StateTransitionController.java:266)
at org.gradle.internal.model.StateTransitionController.lambda$transition$7(StateTransitionController.java:169)
at org.gradle.internal.work.DefaultSynchronizer.withLock(DefaultSynchronizer.java:44)
at org.gradle.internal.model.StateTransitionController.transition(StateTransitionController.java:169)
at org.gradle.internal.buildtree.DefaultBuildTreeLifecycleController.runBuild(DefaultBuildTreeLifecycleController.java:116)
at org.gradle.internal.buildtree.DefaultBuildTreeLifecycleController.scheduleAndRunTasks(DefaultBuildTreeLifecycleController.java:76)
at org.gradle.internal.buildtree.DefaultBuildTreeLifecycleController.scheduleAndRunTasks(DefaultBuildTreeLifecycleController.java:71)
at org.gradle.tooling.internal.provider.runner.BuildModelActionRunner.run(BuildModelActionRunner.java:53)
at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
at org.gradle.internal.buildtree.ProblemReportingBuildActionRunner.run(ProblemReportingBuildActionRunner.java:49)
at org.gradle.launcher.exec.BuildOutcomeReportingBuildActionRunner.run(BuildOutcomeReportingBuildActionRunner.java:65)
at org.gradle.tooling.internal.provider.FileSystemWatchingBuildActionRunner.run(FileSystemWatchingBuildActionRunner.java:140)
at org.gradle.launcher.exec.BuildCompletionNotifyingBuildActionRunner.run(BuildCompletionNotifyingBuildActionRunner.java:41)
at org.gradle.launcher.exec.RootBuildLifecycleBuildActionExecutor.lambda$execute$0(RootBuildLifecycleBuildActionExecutor.java:40)
at org.gradle.composite.internal.DefaultRootBuildState.run(DefaultRootBuildState.java:123)
at org.gradle.launcher.exec.RootBuildLifecycleBuildActionExecutor.execute(RootBuildLifecycleBuildActionExecutor.java:40)
at org.gradle.internal.buildtree.InitDeprecationLoggingActionExecutor.execute(InitDeprecationLoggingActionExecutor.java:62)
at org.gradle.internal.buildtree.InitProblems.execute(InitProblems.java:38)
at org.gradle.internal.buildtree.DefaultBuildTreeContext.execute(DefaultBuildTreeContext.java:40)
at org.gradle.launcher.exec.BuildTreeLifecycleBuildActionExecutor.lambda$execute$0(BuildTreeLifecycleBuildActionExecutor.java:71)
at org.gradle.internal.buildtree.BuildTreeState.run(BuildTreeState.java:60)
at org.gradle.launcher.exec.BuildTreeLifecycleBuildActionExecutor.execute(BuildTreeLifecycleBuildActionExecutor.java:71)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionExecutor$3.call(RunAsBuildOperationBuildActionExecutor.java:61)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionExecutor$3.call(RunAsBuildOperationBuildActionExecutor.java:57)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:199)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:73)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionExecutor.execute(RunAsBuildOperationBuildActionExecutor.java:57)
at org.gradle.launcher.exec.RunAsWorkerThreadBuildActionExecutor.lambda$execute$0(RunAsWorkerThreadBuildActionExecutor.java:36)
at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:264)
at org.gradle.internal.work.DefaultWorkerLeaseService.runAsWorkerThread(DefaultWorkerLeaseService.java:128)
at org.gradle.launcher.exec.RunAsWorkerThreadBuildActionExecutor.execute(RunAsWorkerThreadBuildActionExecutor.java:36)
at org.gradle.tooling.internal.provider.continuous.ContinuousBuildActionExecutor.execute(ContinuousBuildActionExecutor.java:110)
at org.gradle.tooling.internal.provider.SubscribableBuildActionExecutor.execute(SubscribableBuildActionExecutor.java:64)
at org.gradle.internal.session.DefaultBuildSessionContext.execute(DefaultBuildSessionContext.java:46)
at org.gradle.tooling.internal.provider.BuildSessionLifecycleBuildActionExecuter$ActionImpl.apply(BuildSessionLifecycleBuildActionExecuter.java:92)
at org.gradle.tooling.internal.provider.BuildSessionLifecycleBuildActionExecuter$ActionImpl.apply(BuildSessionLifecycleBuildActionExecuter.java:80)
at org.gradle.internal.session.BuildSessionState.run(BuildSessionState.java:69)
at org.gradle.tooling.internal.provider.BuildSessionLifecycleBuildActionExecuter.execute(BuildSessionLifecycleBuildActionExecuter.java:62)
at org.gradle.tooling.internal.provider.BuildSessionLifecycleBuildActionExecuter.execute(BuildSessionLifecycleBuildActionExecuter.java:41)
at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:64)
at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:32)
at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:51)
at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:39)
at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:47)
at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:31)
at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:65)
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:29)
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.internal.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:64)
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:84)
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.AbstractManagedExecutor$1.run(AbstractManagedExecutor.java:47)
Not sure if all that is needed or not. But here is the build.gradle from the desktop folder.
sourceCompatibility = 1.8
sourceSets.main.java.srcDirs = [ "src/" ]
sourceSets.main.resources.srcDirs = ["../assets"]
project.ext.mainClassName = "com.jakemcdaniel.DesktopLauncher"
project.ext.assetsDir = new File("../assets")
import org.gradle.internal.os.OperatingSystem
tasks.register('run', JavaExec) {
dependsOn classes
mainClass = project.mainClassName
classpath = sourceSets.main.runtimeClasspath
standardInput = System.in
workingDir = project.assetsDir
ignoreExitValue = true
if (OperatingSystem.current() == OperatingSystem.MAC_OS) {
// Required to run on macOS
jvmArgs += "-XstartOnFirstThread"
}
}
tasks.register('debug', JavaExec) {
dependsOn classes
mainClass = project.mainClassName
classpath = sourceSets.main.runtimeClasspath
standardInput = System.in
workingDir = project.assetsDir
ignoreExitValue = true
debug = true
}
tasks.register('dist', Jar) {
duplicatesStrategy(DuplicatesStrategy.EXCLUDE)
manifest {
attributes 'Main-Class': project.mainClassName
}
dependsOn configurations.runtimeClasspath
from {
configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
}
with jar
}
dist.dependsOn classes
eclipse.project.name = appName + "-desktop"
java.targetCompatibility = JavaVersion.VERSION_1_8
and here is the DesktopLauncher.java incase this is necessary
package com.jakemcdaniel;
import com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application;
import com.badlogic.gdx.backends.lwjgl3.Lwjgl3ApplicationConfiguration;
import com.jakemcdaniel.FlappyGame;
// Please note that on macOS your application needs to be started with the -XstartOnFirstThread JVM argument
public class DesktopLauncher {
public static void main (String[] arg) {
Lwjgl3ApplicationConfiguration config = new Lwjgl3ApplicationConfiguration();
config.setWindowedMode(FlappyGame.WIDTH, FlappyGame.HEIGHT);
config.setTitle(FlappyGame.TITLE);
config.setForegroundFPS(60);
new Lwjgl3Application(new FlappyGame(), config);
}
}
Let me know if I need to provide anything else. And thanks for any help I’ve been stuck trying to figure this out for a while now.
I’ve tried to use the source from the YouTube video on the guys github to see what his build.gradle looked like but the video is from 8 years ago so there’s a lot of deprecated features in it and I’m not sure what to take from it if anything. Other than that I thought at first it might be a memory issue so I went over all the classes to make sure anything unused was disposed when it needed to be.
Jake McDaniel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.