JME on JDK 16

tlf30 · March 19, 2021, 5:07pm

Hello,

I don’t know how many people have tried, but I figured I would report on running jme on jdk 16.
I was able to compile, run tests, and run a jme app without any issues on jdk 16.
This is not surprising as I did not see any deprecations that should cause us problems, but I figured I would check.

Anyways, for anyone wondering, it does work.

Thanks,
Trevor

danielp · March 19, 2021, 10:31pm

I haven’t done any explicit testing per se, but I’m also running my jME application on JDK 16 without issues.

sgold · March 19, 2021, 11:07pm

But note that the latest release of Gradle (v6.8.3) doesn’t support any JDK beyond 15.

https://docs.gradle.org/current/userguide/compatibility.html

danielp · March 19, 2021, 11:10pm

Yes - I’m using a pre-release Gradle v7 right now, though with the new-ish Java Toolchains feature you can build against a JDK that Gradle itself doesn’t run on:

java {
	toolchain {
		languageVersion = JavaLanguageVersion.of(16)
	}
}

Benoit_Dubreuil · July 8, 2021, 7:21pm

Good to know. Thank you

Making a post like this is really useful for Googlers who just want answers.

Ali_RS · July 16, 2021, 1:57pm

Note that ReflectionAllocator seems to be broken with JDK 16.

SEVERE: Buffer cannot be destroyed: java.nio.DirectFloatBufferU

Even by adding this JVM arg (which used to solve that on jdk 11+)

"--add-opens=java.base/jdk.internal.ref=ALL-UNNAMED"

you can test it with

github.com

jMonkeyEngine/jmonkeyengine/blob/d76d4dc8c67bc99c5fd197d41a102639194a4e3b/jme3-examples/src/main/java/jme3test/app/TestReleaseDirectMemory.java#L43

    
      
          package jme3test.app;
          
          
import com.jme3.app.SimpleApplication;
          import com.jme3.material.Material;
          import com.jme3.scene.Geometry;
          import com.jme3.scene.shape.Box;
          import com.jme3.util.BufferUtils;
          import java.nio.ByteBuffer;
          import java.nio.FloatBuffer;
          
          
public class TestReleaseDirectMemory extends SimpleApplication {
          
          
    public static void main(String[] args){
                  TestReleaseDirectMemory app = new TestReleaseDirectMemory();
                  app.start();
              }
          
          
    @Override
              public void simpleInitApp() {
                  Box b = new Box(1, 1, 1);
                  Geometry geom = new Geometry("Box", b);

sgold · December 8, 2021, 8:47pm

See issue 1674.