Could not target platform: 'Java SE 12' using tool chain: 'JDK 8 (1.8)'

Question

I run the following command under the root path of my java spring boot (grade) project on my Terminal:

./gradlew clean check

But I get error message:

> Task :compileJava FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':compileJava'.
> Could not target platform: 'Java SE 12' using tool chain: 'JDK 8 (1.8)'.

How to get rid of this error?

Update your jdk or reduce your target platform – khelwood Apr 17 '20 at 08:39 — khelwood, Apr 17 '20 at 08:39

score 2 · Answer 1 · answered Jun 24 '20 at 21:05

Old question but I looked for the same just now.

Gradle has a default JVM set in your %userprofile%/.gradle/gradle.properties. This is in the folder "C:\Users\j.gradle\gradle.properties" for me:

That's where you should also put your newer JVM to make sure gradle can compile newer projects. Looks like this now:

org.gradle.java.home=C:/Program Files/AdoptOpenJDK/jdk-11.0.7.10-hotspot

See also this thread where I posted the same answer: https://stackoverflow.com/a/62564011/2807735

The equivalent file for Linux is "~/.gradle/gradle.properties" — jostle, Jul 01 '20 at 07:56

score 1 · Answer 2 · answered Apr 17 '20 at 08:39

1

You are trying to compile classes to Java 12, but you are using a Java 8 JDK.

If you type in java -version in console, you should see Java 8. You need to install Java 12 or higher and put it on your PATH OR change your target to Java 8

answered Apr 17 '20 at 08:39

Tom Cools

1,098
8
23

I already installed Java 12. How to switch to 12 via Terminal command? – Leem Apr 17 '20 at 08:59

Stephen Hosking · Answer 3 · 2020-08-06T12:10:06.750

0

As a result of another SO fix I had these sections in different parts build.gradle (app):

compileOptions {
    sourceCompatibility 1_8
    targetCompatibility 1_8
}

compileOptions {
    sourceCompatibility 1_7
    targetCompatibility 1_7
}

I removed second and the problem was fixed.

edited Aug 06 '20 at 12:10

answered Aug 06 '20 at 12:02

Stephen Hosking

1,405
16
34

Could not target platform: 'Java SE 12' using tool chain: 'JDK 8 (1.8)'

3 Answers3