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kotlinlang

Hi! Whats the differences when setting these settings?
```java.sourceCompatibility = JavaVersion.VERSION_17```
or
```    withType&lt;JavaCompile&gt;().configureEach {
        targetCompatibility = JvmTarget.JVM_17.target
    }```
Which should I use and why? Want to understand the reason

Or should I use JVM toolchain?
```kotlin {
    jvmToolchain {
        (this as JavaToolchainSpec).languageVersion.set(JavaLanguageVersion.of(17))
    }
}```
Then I dont need to specify sourceCompatibility and targetCompatibility. Am I right ?

I would go with the latter.
Then Gradle can be run with any supported version like Java 8, but the Java 17 toolchain is used for compiling the code.
The cast though looks suspicious.

Besides that your last snipped does not look correct.

If it is about a Kotlin project, see <https://blog.jetbrains.com/kotlin/2021/11/gradle-jvm-toolchain-support-in-the-kotlin-plugin/> and generally <https://docs.gradle.org/current/userguide/toolchains.html>

I changed it to
```kotlin {
    jvmToolchain {
        languageVersion.set(JavaLanguageVersion.of(17))
    }
}```