# JavaExec

@DisableCachingByDefault(because = "Gradle would require more information to cache this task")
abstract class JavaExec : ConventionTask, JavaExecSpec(source)

Executes a Java application in a child process.

Similar to Exec, but starts a JVM with the given classpath and application class.

    plugins {
        id 'java'
    }

    task runApp(type: JavaExec) {
      classpath = sourceSets.main.runtimeClasspath

      mainClass = 'package.Main'

      // arguments to pass to the application
      args 'appArg1'
    }

    // Using and creating an Executable Jar
    jar {
      manifest {
        attributes('Main-Class': 'package.Main')
      }
    }

    task runExecutableJar(type: JavaExec) {
      // Executable jars can have only _one_ jar on the classpath.
      classpath = files(tasks.jar)

      // 'main' does not need to be specified

      // arguments to pass to the application
      args 'appArg1'
    }

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The process can be started in debug mode (see getDebug) in an ad-hoc manner by supplying the `--debug-jvm` switch when invoking the build.

    gradle someJavaExecTask --debug-jvm

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Also, debug configuration can be explicitly set in debugOptions:

    task runApp(type: JavaExec) {
       ...

       debugOptions {
           enabled = true
           port = 5566
           server = true
           suspend = false
       }
    }

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## Constructors

JavaExec
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constructor()

## Properties

conventionMapping
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open val conventionMapping: @Nullable ConventionMapping
description
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open var description: @Nullable String
enabled
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open var enabled: Boolean
extra
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val ExtensionAware.extra: ExtraPropertiesExtension

The extra properties extension in this object's extension container.

group
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open var group: @Nullable String
impliesSubProjects
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open var impliesSubProjects: Boolean
modularity
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val modularity: ModularitySpec
state
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val state: TaskStateInternal
TASK_ACTION
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val TASK_ACTION: String = "action"
TASK_CONSTRUCTOR_ARGS
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val TASK_CONSTRUCTOR_ARGS: String = "constructorArgs"
TASK_DEPENDS_ON
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val TASK_DEPENDS_ON: String = "dependsOn"
TASK_DESCRIPTION
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val TASK_DESCRIPTION: String = "description"
TASK_GROUP
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val TASK_GROUP: String = "group"
TASK_NAME
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val TASK_NAME: String = "name"
TASK_OVERWRITE
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val TASK_OVERWRITE: String = "overwrite"
TASK_TYPE
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val TASK_TYPE: String = "type"
timeout
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val timeout: Property<Duration>

## Functions

acceptServiceReferences
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open fun acceptServiceReferences(serviceReferences: Set<ServiceReferenceSpec>)
appendParallelSafeAction
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open fun appendParallelSafeAction(action: Action<in Task>)
args
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open fun args(args: Iterable<out Any>): JavaExecSpec
open fun args(args: Array<Any>): JavaExec
bootstrapClasspath
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open fun bootstrapClasspath(@Nullable classpath: Array<@Nullable Any>): JavaExec
buildFailureMessage
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open fun buildFailureMessage(cause: Throwable): String
classpath
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open fun classpath(@Nullable paths: Array<@Nullable Any>): JavaExec
compareTo
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open fun compareTo(otherTask: Task): Int
configure
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open fun configure(closure: Closure): Task
abstract fun configure(cl: Closure): T
configure
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inline fun <T : Any> ExtensionAware.configure(noinline configuration: T.() -> Unit)

Executes the given configuration block against the extension of the specified type.

conventionMapping
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open fun conventionMapping(property: String, mapping: Callable<out Any>): Task
copyTo
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open fun copyTo(options: JavaForkOptions): JavaExec
open fun copyTo(target: ProcessForkOptions): JavaExec
debugOptions
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open fun debugOptions(action: Action<JavaDebugOptions>)
dependsOn
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open fun dependsOn(paths: Array<Any>): Task
doFirst
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open fun doFirst(action: Action<in Task>): Task
doLast
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open fun doLast(action: Action<in Task>): Task
doNotTrackState
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open fun doNotTrackState(reasonNotToTrackState: String)
doNotTrackStateIf
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open fun doNotTrackStateIf(reason: String, spec: Spec<in TaskInternal>)
environment
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open fun environment(environmentVariables: Map<String, out Any>): JavaExec
open fun environment(name: String, value: Any): JavaExec
environment
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inline fun JavaExec.environment(vararg environmentVariables: Pair<String, Any>): JavaExec

Kotlin extension function for org.gradle.api.tasks.JavaExec.environment.

inline fun ProcessForkOptions.environment(vararg environmentVariables: Pair<String, Any>): ProcessForkOptions

Kotlin extension function for org.gradle.process.ProcessForkOptions.environment.

exec
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open fun exec()
executable
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open fun executable(executable: Any): JavaExec
finalizedBy
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open fun finalizedBy(paths: Array<Any>): Task
getActions
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open fun getActions(): List<Action<in Task>>
getAllJvmArgs
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open fun getAllJvmArgs(): List<String>
getAnt
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open fun getAnt(): AntBuilder
getArgs
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open fun getArgs(): List<String>
getArgumentProviders
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open fun getArgumentProviders(): List<CommandLineArgumentProvider>
getAsDynamicObject
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open fun getAsDynamicObject(): DynamicObject
getBootstrapClasspath
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open fun getBootstrapClasspath(): FileCollection
getClasspath
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open fun getClasspath(): FileCollection
getCommandLine
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@Internal
open fun getCommandLine(): List<String>
getDebug
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open fun getDebug(): Boolean
getDebugOptions
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open fun getDebugOptions(): JavaDebugOptions
getDefaultCharacterEncoding
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@Nullable
open fun getDefaultCharacterEncoding(): @Nullable String
getDependsOn
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open fun getDependsOn(): Set<Any>
getDestroyables
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open fun getDestroyables(): TaskDestroyables
getDidWork
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open fun getDidWork(): Boolean
getEnableAssertions
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open fun getEnableAssertions(): Boolean
getEnvironment
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@Internal
open fun getEnvironment(): Map<String, Any>
getErrorOutput
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@Internal
open fun getErrorOutput(): OutputStream
getExecutable
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@Internal(value = "covered by getJavaVersion")
@Nullable
open fun getExecutable(): @Nullable String
getExecutionResult
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@Internal
open fun getExecutionResult(): Provider<ExecResult>
Returns the result for the command run by this task.
getExtensions
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open fun getExtensions(): ExtensionContainer
getFinalizedBy
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open fun getFinalizedBy(): TaskDependency
getIdentityPath
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open fun getIdentityPath(): Path
getInputs
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open fun getInputs(): TaskInputsInternal
abstract fun getInputs(): TaskInputs
getJavaLauncher
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abstract fun getJavaLauncher(): Property<JavaLauncher>
Configures the java executable to be used to run the tests.
getJavaVersion
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@Internal(value = "covered by getJavaLauncher().getMetadata().getLanguageVersion()")
open fun getJavaVersion(): JavaVersion
Returns the version of the Java executable specified by getJavaLauncher.
getJvmArgs
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open fun getJvmArgs(): List<String>
getJvmArgumentProviders
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open fun getJvmArgumentProviders(): List<CommandLineArgumentProvider>
getJvmArguments
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open fun getJvmArguments(): ListProperty<String>
getLifecycleDependencies
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open fun getLifecycleDependencies(): TaskDependencyInternal
abstract fun getLifecycleDependencies(): TaskDependency
getLocalState
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open fun getLocalState(): TaskLocalState
getLogger
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open fun getLogger(): Logger
getLogging
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open fun getLogging(): LoggingManager
getMainClass
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abstract fun getMainClass(): Property<String>
getMainModule
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abstract fun getMainModule(): Property<String>
getMaxHeapSize
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@Nullable
open fun getMaxHeapSize(): @Nullable String
getMinHeapSize
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@Nullable
open fun getMinHeapSize(): @Nullable String
getModularity
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abstract fun getModularity(): ModularitySpec
getMustRunAfter
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open fun getMustRunAfter(): TaskDependency
getName
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open fun getName(): String
getOnlyIf
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open fun getOnlyIf(): Spec<in TaskInternal>
getOutputs
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open fun getOutputs(): TaskOutputsInternal
abstract fun getOutputs(): TaskOutputs
getPath
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open fun getPath(): String
getProject
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open fun getProject(): Project
getProvenance
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open fun getProvenance(): Optional<String>
getReasonNotToTrackState
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open fun getReasonNotToTrackState(): Optional<String>
getReasonsNotToTrackState
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open fun getReasonsNotToTrackState(): Set<String>
getReasonTaskIsIncompatibleWithConfigurationCache
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open fun getReasonTaskIsIncompatibleWithConfigurationCache(): Optional<String>
getRequiredServices
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open fun getRequiredServices(): TaskRequiredServices
getSharedResources
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open fun getSharedResources(): List<ResourceLock>
abstract fun getSharedResources(): List<out ResourceLock>
getShouldRunAfter
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open fun getShouldRunAfter(): TaskDependency
getStandardInput
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@Internal
open fun getStandardInput(): InputStream
getStandardOutput
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@Internal
open fun getStandardOutput(): OutputStream
getStandardOutputCapture
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open fun getStandardOutputCapture(): StandardOutputCapture
getState
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abstract fun getState(): TaskState
getSystemProperties
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open fun getSystemProperties(): Map<String, @Nullable Any>
getTaskActions
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open fun getTaskActions(): List<InputChangesAwareTaskAction>
getTaskDependencies
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open fun getTaskDependencies(): TaskDependencyInternal
abstract fun getTaskDependencies(): TaskDependency
getTaskIdentity
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open fun getTaskIdentity(): TaskIdentity<out Any>
getTemporaryDir
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open fun getTemporaryDir(): File
getTemporaryDirFactory
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open fun getTemporaryDirFactory(): Factory<File>
getWorkingDir
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@Internal
open fun getWorkingDir(): File
hasProperty
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open fun hasProperty(propertyName: String): Boolean
hasTaskActions
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open fun hasTaskActions(): Boolean
injectIntoNewInstance
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open fun <T : Task?> injectIntoNewInstance(project: ProjectInternal, identity: TaskIdentity<T>, factory: Callable<T>): T
isCompatibleWithConfigurationCache
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open fun isCompatibleWithConfigurationCache(): Boolean
isEnabled
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open fun isEnabled(): Boolean
isHasCustomActions
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open fun isHasCustomActions(): Boolean
isIgnoreExitValue
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@Input
open fun isIgnoreExitValue(): Boolean
jvmArgs
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open fun jvmArgs(arguments: Iterable<out Any>): JavaExec
open fun jvmArgs(arguments: Array<Any>): JavaExec
mustRunAfter
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open fun mustRunAfter(paths: Array<Any>): Task
notCompatibleWithConfigurationCache
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open fun notCompatibleWithConfigurationCache(reason: String)
onlyIf
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open fun onlyIf(spec: Spec<in Task>)
prependParallelSafeAction
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open fun prependParallelSafeAction(action: Action<in Task>)
property
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open fun property(propertyName: String): Any
restoreOnlyIf
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open fun restoreOnlyIf(onlyIf: Spec<in TaskInternal>)
restoreTaskActions
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open fun restoreTaskActions(taskActions: List<InputChangesAwareTaskAction>)
setActions
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open fun setActions(replacements: List<Action<in Task>>)
setAllJvmArgs
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open fun setAllJvmArgs(arguments: Iterable<out Any>)
open fun setAllJvmArgs(arguments: List<String>)
setArgs
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open fun setArgs(applicationArgs: Iterable<out Any>): JavaExec
open fun setArgs(applicationArgs: List<String>): JavaExec
setArgsString
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open fun setArgsString(args: String): JavaExec
Parses an argument list from `args` and passes it to setArgs.
setBootstrapClasspath
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open fun setBootstrapClasspath(classpath: FileCollection)
setClasspath
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open fun setClasspath(classpath: FileCollection): JavaExec
setDebug
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open fun setDebug(enabled: Boolean)
setDefaultCharacterEncoding
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open fun setDefaultCharacterEncoding(@Nullable defaultCharacterEncoding: @Nullable String)
setDependsOn
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open fun setDependsOn(dependsOn: Iterable<out Any>)
setDidWork
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open fun setDidWork(didWork: Boolean)
setEnableAssertions
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open fun setEnableAssertions(enabled: Boolean)
setEnvironment
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open fun setEnvironment(environmentVariables: Map<String, out Any>)
setEnvironment
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inline fun ProcessForkOptions.setEnvironment(vararg environmentVariables: Pair<String, Any>)

Kotlin extension function for org.gradle.process.ProcessForkOptions.setEnvironment.

setErrorOutput
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open fun setErrorOutput(outputStream: OutputStream): JavaExec
setExecutable
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open fun setExecutable(executable: Any)
open fun setExecutable(executable: String)
setFinalizedBy
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open fun setFinalizedBy(finalizedByTasks: Iterable<out Any>)
setIgnoreExitValue
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open fun setIgnoreExitValue(ignoreExitValue: Boolean): JavaExecSpec
setJvmArgs
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open fun setJvmArgs(arguments: Iterable<out Any>)
open fun setJvmArgs(arguments: List<String>)
setMaxHeapSize
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open fun setMaxHeapSize(@Nullable heapSize: @Nullable String)
setMinHeapSize
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open fun setMinHeapSize(@Nullable heapSize: @Nullable String)
setMustRunAfter
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open fun setMustRunAfter(mustRunAfterTasks: Iterable<out Any>)
setOnlyIf
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open fun setOnlyIf(spec: Spec<in Task>)
setProperty
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open fun setProperty(name: String, value: Any)
setShouldRunAfter
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open fun setShouldRunAfter(shouldRunAfterTasks: Iterable<out Any>)
setStandardInput
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open fun setStandardInput(inputStream: InputStream): JavaExec
setStandardOutput
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open fun setStandardOutput(outputStream: OutputStream): JavaExec
setSystemProperties
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open fun setSystemProperties(properties: Map<String, out @Nullable Any>)
setSystemProperties
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inline fun JavaForkOptions.setSystemProperties(vararg properties: Pair<String, Any>)

Kotlin extension function for org.gradle.process.JavaForkOptions.setSystemProperties.

setWorkingDir
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open fun setWorkingDir(dir: File)
open fun setWorkingDir(dir: Any)
shouldRunAfter
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open fun shouldRunAfter(paths: Array<Any>): TaskDependency
systemProperties
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open fun systemProperties(properties: Map<String, out @Nullable Any>): JavaExec
systemProperties
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inline fun JavaExec.systemProperties(vararg properties: Pair<String, Any>): JavaExec

Kotlin extension function for org.gradle.api.tasks.JavaExec.systemProperties.

inline fun JavaForkOptions.systemProperties(vararg properties: Pair<String, Any>): JavaForkOptions

Kotlin extension function for org.gradle.process.JavaForkOptions.systemProperties.

systemProperty
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open fun systemProperty(name: String, @Nullable value: @Nullable Any): JavaExec
the
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inline fun <T : Any> ExtensionAware.the(): T

Returns the extension of the specified type.

fun <T : Any> ExtensionAware.the(extensionType: KClass<T>): T

Returns the extension of the specified extensionType.

usesService
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open fun usesService(service: Provider<out BuildService<out Any>>)
workingDir
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open fun workingDir(dir: Any): JavaExec