SpeedGuid crashes unexpectedly

vliwei3 · 2025-05-08T03:52:30+00:00

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My jdk version：

java version "24.0.1" 2025-04-15
Java(TM) SE Runtime Environment (build 24.0.1+9-30)
Java HotSpot(TM) 64-Bit Server VM (build 24.0.1+9-30, mixed mode, sharing)

when I input “java -jar SpeedGuide.jar”
Error: Could not find or load main class com.lseg.ema.example.gui.SpeedGuide
Caused by: java.lang.NoClassDefFoundError: javafx/application/Application

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Accepted answers

Jirapongse

@vliwei3

This error means that this 1.8.0_451 doesn't have JavaFx.

Error: JavaFX has been removed from JDK 8.

Please try 1.8.0_333.

All comments

Jirapongse

@vliwei3

Thank you for reaching out to us.

I checked the source code page on GitHub.

Note
: Because the package was built using JDK 1.8. which conveniently packages the JavaFx package, user must ensure they install Java 8 runtime.

sergei.nazarov

Hi @Jirapongse, we have pretty much the same problem, but it seems like the root of the crash lies in the Java 8 runtime itself

$ java -jar .\SpeedGuide.jar
Error: JavaFX has been removed from JDK 8.
Visit https://www.oracle.com/javase/javafx for more information.
Error: Could not find or load main class com.lseg.ema.example.gui.SpeedGuide

Any suggestions?

Thanks in advance.

Jirapongse

@sergei.nazarov

The SpeedGuide uses the JavaFX.

I checked and found that the JavaFX may be removed from the new versions of JDK 1.8.

I tested it with the JDK 1.8.0_333 and it can run the SpeedGuide properly.

vliwei3

The problem still exists.

java version "1.8.0_451"
Java(TM) SE Runtime Environment (build 1.8.0_451-b10)
Java HotSpot(TM) 64-Bit Server VM (build 25.451-b10, mixed mode)

Error: JavaFX has been removed from JDK 8.
Visit https://www.oracle.com/javase/javafx for more information.
Error: Could not find or load main class com.lseg.ema.example.gui.SpeedGuide

Jirapongse

@vliwei3

This error means that this 1.8.0_451 doesn't have JavaFx.

Error: JavaFX has been removed from JDK 8.

Please try 1.8.0_333.

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