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in an android app, I'd like to use jdk25 but compile targetting jdk21, is such setup done properly?
```kotlin {
    android { 
        ...
        compileOptions {
            sourceCompatibility = JavaVersion.VERSION_21
            targetCompatibility = JavaVersion.VERSION_21
        }
    }
    jvmToolchain(25)
    compilerOptions.jvmTarget = JvmTarget.JVM_21
}
java.toolchain.languageVersion = JavaLanguageVersion.of(25)```


If you're using Kotlin, you also want to set the `release` flag of Kotlin:
• <https://jakewharton.com/kotlins-jdk-release-compatibility-flag/|jakewharton.com/kotlins-jdk-release-compatibility-flag>


Using toolchains is not a requirement and rarely a good idea:
• <https://jakewharton.com/gradle-toolchains-are-rarely-a-good-idea/|jakewharton.com/gradle-toolchains-are-rarely-a-good-idea>

Shameless plug for tapmoc that can configure your compatibility flags for you: <https://github.com/GradleUp/Tapmoc|github.com/GradleUp/Tapmoc>

Yeah, I read that, anyway `kotlin.targets` is now deprecated

I also read <https://committing-crimes.com/articles/2024-10-30-using-gradle-toolchains-properly/|this>