CODEWITHSUNDEEP
javamavenjavafx-8
Horuss
Horuss

Reputation: 300

Handling specific Java version for desktop application

What is the best way to handle situation, when a Java desktop application (executable JAR) requires specific (or newer) version/update of Java, to not get some NoClassDef exceptions?

Details: I have JavaFX 8 desktop application, build with Maven and com.zenjava.javafx-maven-plugin to executable JAR. I'm using new features of JDK 8u40. I would like to nicely handle situation, when someone is trying to run it with older Java version.

First, most low-end approach is to check

System.getProperty("java.version");

at the start of main function, parse it with a couple of "ifs" to extract is it major >= 8 and update >= 40, if not show some popup instead of app. But it seems to me like mediocre solution.

I wonder are there better ways? I'd love to know more about direct code solutions, external libs, additional jar launchers or Maven options for this purpose.

Edit: additional info - I would like to avoid platform-specific solutions

Upvotes: 0

Views: 75

Answers (1)

FibreFoX
FibreFoX

Reputation: 2858

The solution which mostly works: just create a native bunde with included JRE. This is the default when calling mvn jfx:native, so you shouldn't worry about the class being there, because you bundled that specific version.

That is the main reason why some are using that option. Just imagine the situation you are require Java 8 but the user just uses Java 7 and so on, it makes the bundle bigger, indeed, but it preserves you from such problems.

Disclaimer: I'm the maintainer of the javafx-maven-plugin, there are example-projects ;) but no cookies yet.

Upvotes: 1

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