Known Issues

Class file has wrong version (55.0 / 52.0)

If you use Java 8-10, you need FXGL 0.5.4. If you use Java 11, you need FXGL 11+ and let the maven-compiler know:

            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.0</version>
                <configuration>
                    <release>11</release>
                </configuration>
            </plugin>

Linux

If you are running into a MediaException that says Could not create player!, then it is highly likely that you are missing libavcodec.so and libavformat.so or their versions are not supported. This can be fixed by following the instructions here.

Ubuntu 16.04 AnimationTimer runs too fast

Run the JVM with -Dquantum.mutithreaded=false

Q: I get an error X when I run my game.

A: FXGL has a relatively robust exception handling mechanism.

First, read what the error message is, then read what the error type is. The method where the error occurred and the line number in the file are also given. It is likely that you can fix the issue given that information. If not, contact details are below.

Contact Details

Contact details are found here