> However, gradle build or mvn install won’t select a proper version of Java to build your code.

    build.gradle.kts
    java {
        toolchain {
             languageVersion = JavaLanguageVersion.of(17)
             //bonus: pick your favorite distribution with vendor = JvmVendorSpec.<X>
        }
    }

> It won’t even tell you are building with wrong version.

Right, "Class file has wrong version" doesn't explicitly tell you it's the wrong JDK. Gradle itself runs from a JDK8, so even the install you made with your Windows XP will work fine.

If your last experience with Java was 20 years ago and you think that for some reason it hasn't kept up with modern advancement and leapfrogged most languages (how's async doing in rust? virtual threads still stuck nowhere? cool.), sure, keep telling yourself that. You could at least keep it to yourself out of politeness though, or at the very least check that what you're saying is accurate.