Package org.gradle.api.tasks

# Class JavaExec

java.lang.Object
org.gradle.api.internal.AbstractTask
org.gradle.api.DefaultTask
org.gradle.api.internal.ConventionTask
org.gradle.api.tasks.JavaExec

All Implemented Interfaces:
  `Comparable<Task>`, `org.gradle.api.internal.DynamicObjectAware`, `org.gradle.api.internal.IConventionAware`, `org.gradle.api.internal.TaskInternal`, `Named`, `ExtensionAware`, `Task`, `BaseExecSpec`, `JavaExecSpec`, `JavaForkOptions`, `ProcessForkOptions`, `Configurable<Task>`

@DisableCachingByDefault(because="Gradle would require more information to cache this task") public abstract class JavaExec extends org.gradle.api.internal.ConventionTask implements JavaExecSpec
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'
     }

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

Also, debug configuration can be explicitly set in `debugOptions(Action)`:

     task runApp(type: JavaExec) {
        ...

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

- ## Nested Class Summary

  ## Nested classes/interfaces inherited from interface org.gradle.api.Named

  `Named.Namer`

- ## Field Summary

  ### Fields inherited from interface org.gradle.api.Task

  `TASK_ACTION, TASK_CONSTRUCTOR_ARGS, TASK_DEPENDS_ON, TASK_DESCRIPTION, TASK_GROUP, TASK_NAME, TASK_OVERWRITE, TASK_TYPE`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `JavaExec()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `JavaExecSpec`
  `args(Iterable<?> args)`
  Adds args for the main class to be executed.
  `JavaExec`
  `args(Object... args)`
  Adds args for the main class to be executed.
  `JavaExec`
  `bootstrapClasspath(@Nullable Object... classpath)`
  Adds the given values to the end of the bootstrap classpath for the process.
  `JavaExec`
  `classpath(@Nullable Object... paths)`
  Adds elements to the classpath for executing the main class.
  `JavaExec`
  `copyTo(JavaForkOptions options)`
  Copies these options to the given options.
  `JavaExec`
  `copyTo(ProcessForkOptions target)`
  Copies these options to the given target options.
  `void`
  `debugOptions(Action<JavaDebugOptions> action)`
  Configures Java Debug Wire Protocol properties for the process.
  `JavaExec`
  `environment(String name, Object value)`
  Adds an environment variable to the environment for this process.
  `JavaExec`
  `environment(Map<String,?> environmentVariables)`
  Adds some environment variables to the environment for this process.
  `void`
  `exec()`
  `JavaExec`
  `executable(Object executable)`
  Sets the name of the executable to use.
  `List<String>`
  `getAllJvmArgs()`
  Returns the full set of arguments to use to launch the JVM for the process.
  `List<String>`
  `getArgs()`
  Returns the arguments passed to the main class to be executed.
  `List<CommandLineArgumentProvider>`
  `getArgumentProviders()`
  Argument providers for the application.
  `FileCollection`
  `getBootstrapClasspath()`
  Returns the bootstrap classpath to use for the process.
  `FileCollection`
  `getClasspath()`
  Returns the classpath for executing the main class.
  `List<String>`
  `getCommandLine()`
  Returns the full command line, including the executable plus its arguments.
  `boolean`
  `getDebug()`
  Determines whether debugging is enabled for the test process.
  `JavaDebugOptions`
  `getDebugOptions()`
  Returns the Java Debug Wire Protocol properties for the process.
  `@Nullable String`
  `getDefaultCharacterEncoding()`
  Returns the default character encoding to use.
  `boolean`
  `getEnableAssertions()`
  Returns true if assertions are enabled for the process.
  `Map<String,Object>`
  `getEnvironment()`
  The environment variables to use for the process.
  `OutputStream`
  `getErrorOutput()`
  Returns the output stream to consume standard error from the process executing the command.
  `protected abstract org.gradle.process.internal.ExecActionFactory`
  `getExecActionFactory()`
  `@Nullable String`
  `getExecutable()`
  Returns the name of the executable to use.
  `Provider<ExecResult>`
  `getExecutionResult()`
  Returns the result for the command run by this task.
  `Property<JavaLauncher>`
  `getJavaLauncher()`
  Configures the java executable to be used to run the tests.
  `protected abstract JavaToolchainService`
  `getJavaToolchainService()`
  `JavaVersion`
  `getJavaVersion()`
  Returns the version of the Java executable specified by `getJavaLauncher()`.
  `List<String>`
  `getJvmArgs()`
  Returns the extra arguments to use to launch the JVM for the process.
  `List<CommandLineArgumentProvider>`
  `getJvmArgumentProviders()`
  Command line argument providers for the java process to fork.
  `ListProperty<String>`
  `getJvmArguments()`
  Extra JVM arguments to be to use to launch the JVM for the process.
  `Property<String>`
  `getMainClass()`
  The fully qualified name of the Main class to be executed.
  `Property<String>`
  `getMainModule()`
  The name of the main module to be executed if the application should run as a Java module.
  `@Nullable String`
  `getMaxHeapSize()`
  Returns the maximum heap size for the process, if any.
  `@Nullable String`
  `getMinHeapSize()`
  Returns the minimum heap size for the process, if any.
  `ModularitySpec`
  `getModularity()`
  Returns the module path handling for executing the main class.
  `protected abstract ObjectFactory`
  `getObjectFactory()`
  `protected abstract org.gradle.api.internal.provider.PropertyFactory`
  `getPropertyFactory()`
  `protected abstract ProviderFactory`
  `getProviderFactory()`
  `InputStream`
  `getStandardInput()`
  Returns the standard input stream for the process executing the command.
  `OutputStream`
  `getStandardOutput()`
  Returns the output stream to consume standard output from the process executing the command.
  `Map<String,@Nullable Object>`
  `getSystemProperties()`
  Returns the system properties which will be used for the process.
  `File`
  `getWorkingDir()`
  Returns the working directory for the process.
  `boolean`
  `isIgnoreExitValue()`
  Tells whether a non-zero exit value is ignored, or an exception thrown.
  `JavaExec`
  `jvmArgs(Iterable<?> arguments)`
  Adds some arguments to use to launch the JVM for the process.
  `JavaExec`
  `jvmArgs(Object... arguments)`
  Adds some arguments to use to launch the JVM for the process.
  `void`
  `setAllJvmArgs(Iterable<?> arguments)`
  Sets the full set of arguments to use to launch the JVM for the process.
  `void`
  `setAllJvmArgs(List<String> arguments)`
  Sets the full set of arguments to use to launch the JVM for the process.
  `JavaExec`
  `setArgs(Iterable<?> applicationArgs)`
  Sets the args for the main class to be executed.
  `JavaExec`
  `setArgs(List<String> applicationArgs)`
  Sets the args for the main class to be executed.
  `JavaExec`
  `setArgsString(String args)`
  Parses an argument list from `args` and passes it to `setArgs(List)`.
  `void`
  `setBootstrapClasspath(FileCollection classpath)`
  Sets the bootstrap classpath to use for the process.
  `JavaExec`
  `setClasspath(FileCollection classpath)`
  Sets the classpath for executing the main class.
  `void`
  `setDebug(boolean enabled)`
  Enable or disable debugging for the process.
  `void`
  `setDefaultCharacterEncoding(@Nullable String defaultCharacterEncoding)`
  Sets the default character encoding to use.
  `void`
  `setEnableAssertions(boolean enabled)`
  Enable or disable assertions for the process.
  `void`
  `setEnvironment(Map<String,?> environmentVariables)`
  Sets the environment variable to use for the process.
  `JavaExec`
  `setErrorOutput(OutputStream outputStream)`
  Sets the output stream to consume standard error from the process executing the command.
  `void`
  `setExecutable(Object executable)`
  Sets the name of the executable to use.
  `void`
  `setExecutable(String executable)`
  Sets the name of the executable to use.
  `JavaExecSpec`
  `setIgnoreExitValue(boolean ignoreExitValue)`
  Sets whether a non-zero exit value is ignored, or an exception thrown.
  `void`
  `setJvmArgs(Iterable<?> arguments)`
  Sets the extra arguments to use to launch the JVM for the process.
  `void`
  `setJvmArgs(List<String> arguments)`
  Sets the extra arguments to use to launch the JVM for the process.
  `void`
  `setMaxHeapSize(@Nullable String heapSize)`
  Sets the maximum heap size for the process.
  `void`
  `setMinHeapSize(@Nullable String heapSize)`
  Sets the minimum heap size for the process.
  `JavaExec`
  `setStandardInput(InputStream inputStream)`
  Sets the standard input stream for the process executing the command.
  `JavaExec`
  `setStandardOutput(OutputStream outputStream)`
  Sets the output stream to consume standard output from the process executing the command.
  `void`
  `setSystemProperties(Map<String,? extends @Nullable Object> properties)`
  Sets the system properties to use for the process.
  `void`
  `setWorkingDir(File dir)`
  Sets the working directory for the process.
  `void`
  `setWorkingDir(Object dir)`
  Sets the working directory for the process.
  `JavaExec`
  `systemProperties(Map<String,? extends @Nullable Object> properties)`
  Adds some system properties to use for the process.
  `JavaExec`
  `systemProperty(String name, @Nullable Object value)`
  Adds a system property to use for the process.
  `JavaExec`
  `workingDir(Object dir)`
  Sets the working directory for the process.

  ### Methods inherited from class org.gradle.api.internal.ConventionTask

  `conventionMapping, conventionMapping, getConventionMapping`

  ### Methods inherited from class org.gradle.api.DefaultTask

  `compareTo, configure, dependsOn, doFirst, doFirst, doFirst, doLast, doLast, doLast, finalizedBy, getActions, getAnt, getDependsOn, getDescription, getDestroyables, getDidWork, getEnabled, getExtensions, getFinalizedBy, getGroup, getInputs, getLocalState, getLogger, getLogging, getMustRunAfter, getName, getOutputs, getPath, getProject, getShouldRunAfter, getState, getTaskDependencies, getTemporaryDir, getTimeout, hasProperty, mustRunAfter, onlyIf, onlyIf, onlyIf, property, setActions, setDependsOn, setDescription, setDidWork, setEnabled, setFinalizedBy, setGroup, setMustRunAfter, setOnlyIf, setOnlyIf, setOnlyIf, setProperty, setShouldRunAfter, shouldRunAfter, usesService`

  ### Methods inherited from class org.gradle.api.internal.AbstractTask

  `acceptServiceReferences, appendParallelSafeAction, doNotTrackState, getAsDynamicObject, getIdentityPath, getImpliesSubProjects, getLifecycleDependencies, getOnlyIf, getReasonNotToTrackState, getReasonTaskIsIncompatibleWithConfigurationCache, getRequiredServices, getServices, getSharedResources, getStandardOutputCapture, getTaskActions, getTaskIdentity, getTemporaryDirFactory, hasTaskActions, injectIntoNewInstance, isCompatibleWithConfigurationCache, isEnabled, isHasCustomActions, notCompatibleWithConfigurationCache, prependParallelSafeAction, setImpliesSubProjects`

  ### Methods inherited from class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

  ### Methods inherited from interface org.gradle.api.Task

  `doNotTrackState, notCompatibleWithConfigurationCache`

- ## Constructor Details

  - ### JavaExec

    public JavaExec()

- ## Method Details

  - ### exec

    public void exec()

  - ### getAllJvmArgs

    public List<String> getAllJvmArgs()
    Returns the full set of arguments to use to launch the JVM for the process. This includes arguments to define system properties, the minimum/maximum heap size, and the bootstrap classpath.
    Specified by:
      `getAllJvmArgs` in interface `JavaForkOptions`
    Returns:
      The immutable list of arguments. Returns an empty list if there are no arguments.

  - ### setAllJvmArgs

    public void setAllJvmArgs(List<String> arguments)
    Sets the full set of arguments to use to launch the JVM for the process. Overwrites any previously set system properties, minimum/maximum heap size, assertions, and bootstrap classpath.
    Specified by:
      `setAllJvmArgs` in interface `JavaForkOptions`
    Parameters:
      `arguments` - The arguments. Must not be null.

  - ### setAllJvmArgs

    public void setAllJvmArgs(Iterable<?> arguments)
    Sets the full set of arguments to use to launch the JVM for the process. Overwrites any previously set system properties, minimum/maximum heap size, assertions, and bootstrap classpath.
    Specified by:
      `setAllJvmArgs` in interface `JavaForkOptions`
    Parameters:
      `arguments` - The arguments. Must not be null.

  - ### getJvmArgs

    public List<String> getJvmArgs()
    Returns the extra arguments to use to launch the JVM for the process. Does not include system properties and the minimum/maximum heap size.
    Specified by:
      `getJvmArgs` in interface `JavaForkOptions`
    Returns:
      The immutable list of arguments. Returns an empty list if there are no arguments.

  - ### setJvmArgs

    public void setJvmArgs(List<String> arguments)
    Sets the extra arguments to use to launch the JVM for the process. System properties and minimum/maximum heap size are updated.
    Specified by:
      `setJvmArgs` in interface `JavaForkOptions`
    Parameters:
      `arguments` - The arguments. Must not be null.

  - ### setJvmArgs

    public void setJvmArgs(Iterable<?> arguments)
    Sets the extra arguments to use to launch the JVM for the process. System properties and minimum/maximum heap size are updated.
    Specified by:
      `setJvmArgs` in interface `JavaForkOptions`
    Parameters:
      `arguments` - The arguments. Must not be null.

  - ### jvmArgs

    public JavaExec jvmArgs(Iterable<?> arguments)
    Adds some arguments to use to launch the JVM for the process.
    Specified by:
      `jvmArgs` in interface `JavaForkOptions`
    Parameters:
      `arguments` - The arguments. Must not be null.
    Returns:
      this

  - ### jvmArgs

    public JavaExec jvmArgs(Object... arguments)
    Adds some arguments to use to launch the JVM for the process.
    Specified by:
      `jvmArgs` in interface `JavaForkOptions`
    Parameters:
      `arguments` - The arguments.
    Returns:
      this

  - ### getSystemProperties

    public Map<String,@Nullable Object> getSystemProperties()
    Returns the system properties which will be used for the process.
    Specified by:
      `getSystemProperties` in interface `JavaForkOptions`
    Returns:
      The system properties. Returns an empty map when there are no system properties.

  - ### setSystemProperties

    public void setSystemProperties(Map<String,? extends @Nullable Object> properties)
    Sets the system properties to use for the process.
    Specified by:
      `setSystemProperties` in interface `JavaForkOptions`
    Parameters:
      `properties` - The system properties. Must not be null.

  - ### systemProperties

    public JavaExec systemProperties(Map<String,? extends @Nullable Object> properties)
    Adds some system properties to use for the process.
    Specified by:
      `systemProperties` in interface `JavaForkOptions`
    Parameters:
      `properties` - The system properties. Must not be null.
    Returns:
      this

  - ### systemProperty

    public JavaExec systemProperty(String name, @Nullable Object value)
    Adds a system property to use for the process.
    Specified by:
      `systemProperty` in interface `JavaForkOptions`
    Parameters:
      `name` - The name of the property
      `value` - The value for the property. May be null.
    Returns:
      this

  - ### getBootstrapClasspath

    public FileCollection getBootstrapClasspath()
    Returns the bootstrap classpath to use for the process. The default bootstrap classpath for the JVM is used when this classpath is empty.
    Specified by:
      `getBootstrapClasspath` in interface `JavaForkOptions`
    Returns:
      The bootstrap classpath. Never returns null.

  - ### setBootstrapClasspath

    public void setBootstrapClasspath(FileCollection classpath)
    Sets the bootstrap classpath to use for the process. Set to an empty classpath to use the default bootstrap classpath for the specified JVM.
    Specified by:
      `setBootstrapClasspath` in interface `JavaForkOptions`
    Parameters:
      `classpath` - The classpath. Must not be null. Can be empty.

  - ### bootstrapClasspath

    public JavaExec bootstrapClasspath(@Nullable Object... classpath)
    Adds the given values to the end of the bootstrap classpath for the process.
    Specified by:
      `bootstrapClasspath` in interface `JavaForkOptions`
    Parameters:
      `classpath` - The classpath.
    Returns:
      this

  - ### getMinHeapSize

    public @Nullable String getMinHeapSize()
    Returns the minimum heap size for the process, if any.
    Specified by:
      `getMinHeapSize` in interface `JavaForkOptions`
    Returns:
      The minimum heap size. Returns null if the default minimum heap size should be used.

  - ### setMinHeapSize

    public void setMinHeapSize(@Nullable String heapSize)
    Sets the minimum heap size for the process. Supports the units megabytes (e.g. "512m") and gigabytes (e.g. "1g").
    Specified by:
      `setMinHeapSize` in interface `JavaForkOptions`
    Parameters:
      `heapSize` - The minimum heap size. Use null for the default minimum heap size.

  - ### getDefaultCharacterEncoding

    public @Nullable String getDefaultCharacterEncoding()
    Returns the default character encoding to use.
    Specified by:
      `getDefaultCharacterEncoding` in interface `JavaForkOptions`
    Returns:
      The default character encoding. Returns null if the `default character encoding of this JVM` should be used.

  - ### setDefaultCharacterEncoding

    public void setDefaultCharacterEncoding(@Nullable String defaultCharacterEncoding)
    Sets the default character encoding to use. Note: Many JVM implementations support the setting of this attribute via system property on startup (namely, the `file.encoding` property). For JVMs where this is the case, setting the `file.encoding` property via `JavaForkOptions.setSystemProperties(java.util.Map)` or similar will have no effect as this value will be overridden by the value specified by `JavaForkOptions.getDefaultCharacterEncoding()`.
    Specified by:
      `setDefaultCharacterEncoding` in interface `JavaForkOptions`
    Parameters:
      `defaultCharacterEncoding` - The default character encoding. Use null to use `this JVM's default charset`

  - ### getMaxHeapSize

    public @Nullable String getMaxHeapSize()
    Returns the maximum heap size for the process, if any.
    Specified by:
      `getMaxHeapSize` in interface `JavaForkOptions`
    Returns:
      The maximum heap size. Returns null if the default maximum heap size should be used.

  - ### setMaxHeapSize

    public void setMaxHeapSize(@Nullable String heapSize)
    Sets the maximum heap size for the process. Supports the units megabytes (e.g. "512m") and gigabytes (e.g. "1g").
    Specified by:
      `setMaxHeapSize` in interface `JavaForkOptions`
    Parameters:
      `heapSize` - The heap size. Use null for the default maximum heap size.

  - ### getEnableAssertions

    public boolean getEnableAssertions()
    Returns true if assertions are enabled for the process.
    Specified by:
      `getEnableAssertions` in interface `JavaForkOptions`
    Returns:
      true if assertions are enabled, false if disabled

  - ### setEnableAssertions

    public void setEnableAssertions(boolean enabled)
    Enable or disable assertions for the process.
    Specified by:
      `setEnableAssertions` in interface `JavaForkOptions`
    Parameters:
      `enabled` - true to enable assertions, false to disable.

  - ### getDebug

    public boolean getDebug()
    Determines whether debugging is enabled for the test process. When enabled — `debug = true` — the process is started in a suspended state, listening on port 5005. You should disable parallel test execution when debugging and you will need to reattach the debugger occasionally if you use a non-zero value for `Test.getForkEvery()`.

    Since Gradle 5.6, you can configure the port and other Java debug properties via `JavaForkOptions.debugOptions(Action)`.

    Specified by:
      `getDebug` in interface `JavaForkOptions`
    Returns:
      true when debugging is enabled, false to disable.

  - ### setDebug

    public void setDebug(boolean enabled)
    Enable or disable debugging for the process. When enabled, the process is started suspended and listening on port 5005.

    The debug properties (e.g. the port number) can be configured in `JavaForkOptions.debugOptions(Action)`.

    Specified by:
      `setDebug` in interface `JavaForkOptions`
    Parameters:
      `enabled` - true to enable debugging, false to disable.

  - ### getDebugOptions

    public JavaDebugOptions getDebugOptions()
    Returns the Java Debug Wire Protocol properties for the process. If enabled then the `-agentlib:jdwp=...` will be appended to the JVM arguments with the configuration from the parameter.
    Specified by:
      `getDebugOptions` in interface `JavaForkOptions`

  - ### debugOptions

    public void debugOptions(Action<JavaDebugOptions> action)
    Configures Java Debug Wire Protocol properties for the process. If `JavaForkOptions.setDebug(boolean)` is enabled then the `-agentlib:jdwp=...` will be appended to the JVM arguments with the configuration from the parameter.
    Specified by:
      `debugOptions` in interface `JavaForkOptions`
    Parameters:
      `action` - the Java debug configuration

  - ### getMainModule

    public Property<String> getMainModule()
    The name of the main module to be executed if the application should run as a Java module.
    Specified by:
      `getMainModule` in interface `JavaExecSpec`

  - ### getMainClass

    public Property<String> getMainClass()
    The fully qualified name of the Main class to be executed.

    This does not need to be set if using an Executable Jar with a `Main-Class` attribute.

    Specified by:
      `getMainClass` in interface `JavaExecSpec`

  - ### getArgs

    public List<String> getArgs()
    Returns the arguments passed to the main class to be executed.
    Specified by:
      `getArgs` in interface `JavaExecSpec`

  - ### setArgsString

    public JavaExec setArgsString(String args)
    Parses an argument list from `args` and passes it to `setArgs(List)`.

    The parser supports both single quote (`'`) and double quote (`"`) as quote delimiters. For example, to pass the argument `foo bar`, use `"foo bar"`.

    Note: the parser does not support using backslash to escape quotes. If this is needed, use the other quote delimiter around it. For example, to pass the argument `'singly quoted'`, use `"'singly quoted'"`.

    Parameters:
      `args` - Args for the main class. Will be parsed into an argument list.
    Returns:
      this
    Since:
      4.9

  - ### setArgs

    public JavaExec setArgs(List<String> applicationArgs)
    Sets the args for the main class to be executed.
    Specified by:
      `setArgs` in interface `JavaExecSpec`
    Parameters:
      `applicationArgs` - Args for the main class.
    Returns:
      this

  - ### setArgs

    public JavaExec setArgs(Iterable<?> applicationArgs)
    Sets the args for the main class to be executed.
    Specified by:
      `setArgs` in interface `JavaExecSpec`
    Parameters:
      `applicationArgs` - Args for the main class.
    Returns:
      this

  - ### args

    public JavaExec args(Object... args)
    Adds args for the main class to be executed.
    Specified by:
      `args` in interface `JavaExecSpec`
    Parameters:
      `args` - Args for the main class.
    Returns:
      this

  - ### args

    public JavaExecSpec args(Iterable<?> args)
    Adds args for the main class to be executed.
    Specified by:
      `args` in interface `JavaExecSpec`
    Parameters:
      `args` - Args for the main class.
    Returns:
      this

  - ### getArgumentProviders

    public List<CommandLineArgumentProvider> getArgumentProviders()
    Argument providers for the application.
    Specified by:
      `getArgumentProviders` in interface `JavaExecSpec`

  - ### setClasspath

    public JavaExec setClasspath(FileCollection classpath)
    Sets the classpath for executing the main class.
    Specified by:
      `setClasspath` in interface `JavaExecSpec`
    Parameters:
      `classpath` - the classpath
    Returns:
      this

  - ### classpath

    public JavaExec classpath(@Nullable Object... paths)
    Adds elements to the classpath for executing the main class.
    Specified by:
      `classpath` in interface `JavaExecSpec`
    Parameters:
      `paths` - classpath elements
    Returns:
      this

  - ### getClasspath

    public FileCollection getClasspath()
    Returns the classpath for executing the main class.
    Specified by:
      `getClasspath` in interface `JavaExecSpec`

  - ### getModularity

    public ModularitySpec getModularity()
    Returns the module path handling for executing the main class.
    Specified by:
      `getModularity` in interface `JavaExecSpec`

  - ### copyTo

    public JavaExec copyTo(JavaForkOptions options)
    Copies these options to the given options.
    Specified by:
      `copyTo` in interface `JavaForkOptions`
    Parameters:
      `options` - The target options.
    Returns:
      this

  - ### getJavaVersion

    @Input public JavaVersion getJavaVersion()
    Returns the version of the Java executable specified by `getJavaLauncher()`.
    Since:
      5.2

  - ### getExecutable

    @Internal("covered by getJavaVersion") public @Nullable String getExecutable()
    Returns the name of the executable to use.
    Specified by:
      `getExecutable` in interface `ProcessForkOptions`
    Returns:
      The executable.

  - ### setExecutable

    public void setExecutable(String executable)
    Sets the name of the executable to use.
    Specified by:
      `setExecutable` in interface `ProcessForkOptions`
    Parameters:
      `executable` - The executable. Must not be null.

  - ### setExecutable

    public void setExecutable(Object executable)
    Sets the name of the executable to use.
    Specified by:
      `setExecutable` in interface `ProcessForkOptions`
    Parameters:
      `executable` - The executable. Must not be null.

  - ### executable

    public JavaExec executable(Object executable)
    Sets the name of the executable to use.
    Specified by:
      `executable` in interface `ProcessForkOptions`
    Parameters:
      `executable` - The executable. Must not be null.
    Returns:
      this

  - ### getWorkingDir

    @Internal public File getWorkingDir()
    Returns the working directory for the process. Defaults to the project directory.
    Specified by:
      `getWorkingDir` in interface `ProcessForkOptions`
    Returns:
      The working directory. Never returns null.

  - ### setWorkingDir

    public void setWorkingDir(File dir)
    Sets the working directory for the process.
    Specified by:
      `setWorkingDir` in interface `ProcessForkOptions`
    Parameters:
      `dir` - The working directory. Must not be null.

  - ### setWorkingDir

    public void setWorkingDir(Object dir)
    Sets the working directory for the process. The supplied argument is evaluated as per `Project.file(Object)`.
    Specified by:
      `setWorkingDir` in interface `ProcessForkOptions`
    Parameters:
      `dir` - The working directory. Must not be null.

  - ### workingDir

    public JavaExec workingDir(Object dir)
    Sets the working directory for the process. The supplied argument is evaluated as per `Project.file(Object)`.
    Specified by:
      `workingDir` in interface `ProcessForkOptions`
    Parameters:
      `dir` - The working directory. Must not be null.
    Returns:
      this

  - ### getEnvironment

    @Internal public Map<String,Object> getEnvironment()
    The environment variables to use for the process. Defaults to the environment of this process.
    Specified by:
      `getEnvironment` in interface `ProcessForkOptions`
    Returns:
      The environment. Returns an empty map when there are no environment variables.

  - ### setEnvironment

    public void setEnvironment(Map<String,?> environmentVariables)
    Sets the environment variable to use for the process.
    Specified by:
      `setEnvironment` in interface `ProcessForkOptions`
    Parameters:
      `environmentVariables` - The environment variables. Must not be null.

  - ### environment

    public JavaExec environment(String name, Object value)
    Adds an environment variable to the environment for this process.
    Specified by:
      `environment` in interface `ProcessForkOptions`
    Parameters:
      `name` - The name of the variable.
      `value` - The value for the variable. Must not be null.
    Returns:
      this

  - ### environment

    public JavaExec environment(Map<String,?> environmentVariables)
    Adds some environment variables to the environment for this process.
    Specified by:
      `environment` in interface `ProcessForkOptions`
    Parameters:
      `environmentVariables` - The environment variables. Must not be null.
    Returns:
      this

  - ### copyTo

    public JavaExec copyTo(ProcessForkOptions target)
    Copies these options to the given target options.
    Specified by:
      `copyTo` in interface `ProcessForkOptions`
    Parameters:
      `target` - The target options
    Returns:
      this

  - ### setStandardInput

    public JavaExec setStandardInput(InputStream inputStream)
    Sets the standard input stream for the process executing the command. The stream is closed after the process completes.
    Specified by:
      `setStandardInput` in interface `BaseExecSpec`
    Parameters:
      `inputStream` - The standard input stream for the process. Must not be null.
    Returns:
      this

  - ### getStandardInput

    @Internal public InputStream getStandardInput()
    Returns the standard input stream for the process executing the command. The stream is closed after the process completes. Defaults to an empty stream.
    Specified by:
      `getStandardInput` in interface `BaseExecSpec`
    Returns:
      The standard input stream.

  - ### setStandardOutput

    public JavaExec setStandardOutput(OutputStream outputStream)
    Sets the output stream to consume standard output from the process executing the command. The stream is closed after the process completes.
    Specified by:
      `setStandardOutput` in interface `BaseExecSpec`
    Parameters:
      `outputStream` - The standard output stream for the process. Must not be null.
    Returns:
      this

  - ### getStandardOutput

    @Internal public OutputStream getStandardOutput()
    Returns the output stream to consume standard output from the process executing the command. Defaults to `System.out`.
    Specified by:
      `getStandardOutput` in interface `BaseExecSpec`
    Returns:
      The output stream

  - ### setErrorOutput

    public JavaExec setErrorOutput(OutputStream outputStream)
    Sets the output stream to consume standard error from the process executing the command. The stream is closed after the process completes.
    Specified by:
      `setErrorOutput` in interface `BaseExecSpec`
    Parameters:
      `outputStream` - The standard output error stream for the process. Must not be null.
    Returns:
      this

  - ### getErrorOutput

    @Internal public OutputStream getErrorOutput()
    Returns the output stream to consume standard error from the process executing the command. Default to `System.err`.
    Specified by:
      `getErrorOutput` in interface `BaseExecSpec`
    Returns:
      The error output stream.

  - ### setIgnoreExitValue

    public JavaExecSpec setIgnoreExitValue(boolean ignoreExitValue)
    Sets whether a non-zero exit value is ignored, or an exception thrown.
    Specified by:
      `setIgnoreExitValue` in interface `BaseExecSpec`
    Parameters:
      `ignoreExitValue` - whether a non-zero exit value is ignored, or an exception thrown
    Returns:
      this

  - ### isIgnoreExitValue

    @Input public boolean isIgnoreExitValue()
    Tells whether a non-zero exit value is ignored, or an exception thrown. Defaults to `false`.
    Specified by:
      `isIgnoreExitValue` in interface `BaseExecSpec`
    Returns:
      whether a non-zero exit value is ignored, or an exception thrown

  - ### getCommandLine

    @Internal public List<String> getCommandLine()
    Returns the full command line, including the executable plus its arguments.
    Specified by:
      `getCommandLine` in interface `BaseExecSpec`
    Returns:
      The full command line, including the executable plus its arguments

  - ### getJvmArgumentProviders

    public List<CommandLineArgumentProvider> getJvmArgumentProviders()
    Command line argument providers for the java process to fork.
    Specified by:
      `getJvmArgumentProviders` in interface `JavaForkOptions`

  - ### getJvmArguments

    public ListProperty<String> getJvmArguments()
    Extra JVM arguments to be to use to launch the JVM for the process. Must be used to set a convention for JVM arguments.
    Specified by:
      `getJvmArguments` in interface `JavaExecSpec`

  - ### getExecutionResult

    @Internal public Provider<ExecResult> getExecutionResult()
    Returns the result for the command run by this task. The provider has no value if this task has not been executed yet.
    Returns:
      A provider of the result.
    Since:
      6.1

  - ### getJavaLauncher

    public Property<JavaLauncher> getJavaLauncher()
    Configures the java executable to be used to run the tests.
    Since:
      6.7

  - ### getObjectFactory

    @Inject protected abstract ObjectFactory getObjectFactory()

  - ### getPropertyFactory

    @Inject protected abstract org.gradle.api.internal.provider.PropertyFactory getPropertyFactory()

  - ### getExecActionFactory

    @Inject protected abstract org.gradle.process.internal.ExecActionFactory getExecActionFactory()

  - ### getJavaToolchainService

    @Inject protected abstract JavaToolchainService getJavaToolchainService()

  - ### getProviderFactory

    @Inject protected abstract ProviderFactory getProviderFactory()