}

    private Stream<String> findOpenJDKs() {
        return Stream.of(
            "SOFTWARE\\AdoptOpenJDK\\JDK",
            "SOFTWARE\\Eclipse Adoptium\\JDK",
            "SOFTWARE\\Eclipse Foundation\\JDK"
        ).flatMap(key -> find(key, "\\hotspot\\MSI", "Path").stream());
    }

`J9`::
Matches only virtual machine implementations using the OpenJ9/IBM J9 runtime engine.

For example, to use an https://www.eclipse.org/openj9/[IBM] JVM, distributed via https://adoptopenjdk.net/[AdoptOpenJDK],
you can specify the filter as shown in the example below.

====
include::sample[dir="snippets/java/toolchain-filters/kotlin/",files="build.gradle.kts[tags=toolchain-matching-implementation]"]

        when:
        fails 'help'

        then:
        failureDescriptionContains("Option toolchainVendor doesn't accept value 'unexpectedVendor'. Possible values are " +
            "[ADOPTIUM, ADOPTOPENJDK, AMAZON, APPLE, AZUL, BELLSOFT, GRAAL_VM, HEWLETT_PACKARD, IBM, JETBRAINS, MICROSOFT, ORACLE, SAP, TENCENT, UNKNOWN]")
    }

    @NotYetImplemented

## Build environment requirements

This repository is using [Gradle toolchains](https://docs.gradle.org/current/userguide/toolchains.html) feature
to select and auto-provision required JDKs from [AdoptOpenJdk](https://adoptopenjdk.net) project.

Alternatively, it is still possible to only provide required JDKs via environment variables 

        when:
        succeeds scaladoc, "-i"

        then:
        // Looks like
        // Started Gradle worker daemon (0.399 secs) with fork options DaemonForkOptions{executable=/Library/Java/JavaVirtualMachines/adoptopenjdk-11.jdk/Contents/Home/bin/java, minHeapSize=null, maxHeapSize=234M, jvmArgs=[], keepAliveMode=DAEMON}.
        outputContains("maxHeapSize=234M")
    }

    def "scaladoc multi project"() {
        classes.baseline()

		})
	}
}

func TestStatsContentType(t *testing.T) {
	appOpenMetrics := `# TYPE jvm info
# HELP jvm VM version info
jvm_info{runtime="OpenJDK Runtime Environment",vendor="AdoptOpenJDK",version="16.0.1+9"} 1.0
# TYPE jmx_config_reload_success counter
# HELP jmx_config_reload_success Number of times configuration have successfully been reloaded.
jmx_config_reload_success_total 0.0

Revision:     a27f41e4ae5e8a41ab9b19f8dd6d86d7b384dad4

Kotlin:       1.3.72
Groovy:       2.5.11
Ant:          Apache Ant(TM) version 1.10.7 compiled on September 1 2019
JVM:          14 (AdoptOpenJDK 14+36)
OS:           Mac OS X 10.15.2 x86_64
----

If not, here are some things you might see instead.

=== Command not found: gradle

=== Deprecations

[[adoptopenjdk_download]]
==== AdoptOpenJDK toolchain download

Following the move from AdoptOpenJDK to Adoptium, under the Eclipse foundation, it is no longer possible to download an AdoptOpenJDK build from their end point.
Instead, an Eclipse Temurin or IBM Semeru build is returned.