Package org.gradle.jvm.toolchain

## Interface JavaToolchainSpec

- All Superinterfaces:
    `Describable`

      public interface JavaToolchainSpec
      extends Describable

  Requirements for selecting a Java toolchain.

  A toolchain is a JRE/JDK used by the tasks of a build. Tasks may require one or more of the tools (javac, java, or javadoc) of a toolchain. Depending on the needs of a build, only toolchains matching specific characteristics can be used to run a build or a specific task of a build.

  Even though specification properties can be configured independently, the configuration must follow certain rules in order to form a specification.

  A `JavaToolchainSpec` is considered valid in two cases:

  - when no properties have been set, i.e. the specification is empty;
  - when `language version` has been set, optionally followed by setting any other property.

  In other words, if a vendor or an implementation are specified, they must be accompanied by the language version. An empty specification in most cases corresponds to the toolchain that runs the current build.

  Usage of invalid instances of `JavaToolchainSpec` is deprecated and will be removed in the future versions of Gradle.

  Since:
    6.7

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `Property<JvmImplementation>` | `getImplementation()` | The virtual machine implementation of the toolchain.
    `Property<JavaLanguageVersion>` | `getLanguageVersion()` | The exact version of the Java language that the toolchain is required to support.
    `Property<JvmVendorSpec>` | `getVendor()` | The vendor of the toolchain.

    - ### Methods inherited from interface org.gradle.api.Describable

      `getDisplayName`

- - ### Method Detail

    - #### getLanguageVersion

          Property<JavaLanguageVersion> getLanguageVersion()

      The exact version of the Java language that the toolchain is required to support.

    - #### getVendor

          Property<JvmVendorSpec> getVendor()

      The vendor of the toolchain.

      By default, toolchains from any vendor are eligible.

      Note that the vendor can only be configured if the `language version` is configured as well.

      Since:
        6.8

    - #### getImplementation

          Property<JvmImplementation> getImplementation()

      The virtual machine implementation of the toolchain.

      By default, any implementation (hotspot, j9, ...) is eligible.

      Note that the implementation can only be configured if the `language version` is configured as well.

      Since:
        6.8