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Crash in my mod's fluid setup class. What am I doing wrong here? [solved]


NetherNoah777

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It is not the purpose of this forum to teach basic java.

But try this stripped down emulation of your code:

public class Test {

    public static record Fluid(Map<String, String> properties) {}

    public static Supplier<Fluid> FLUID = getFluid(Test.FLUID_PROPERTIES); // FLUID_PROPERTIES = null at this point
    public static Map<String, String> FLUID_PROPERTIES = Map.of("test", "Hello");

    public static Supplier<Fluid> getFluid(Map<String, String> properties) {
        return () -> new Fluid(properties);
    }

    public static void main(String[] args) {
        System.out.println(FLUID.get().properties()); // prints null
    }
}

Now try this:

public class Test {

    public static record Fluid(Map<String, String> properties) {}

    public static Supplier<Fluid> FLUID = getFluid(() -> Test.FLUID_PROPERTIES); // So pass a supplier instead to defer access
    public static Map<String, String> FLUID_PROPERTIES = Map.of("test", "Hello");

    public static Supplier<Fluid> getFluid(Supplier<Map<String, String>> properties) {
        return () -> new Fluid(properties.get());
    }

    public static void main(String[] args) {
        System.out.println(FLUID.get().properties()); // prints {test=Hello}
    }
}

 

If you don't understand how static initialisation and suppliers work, you have little chance at writing a mod correctly.

Both Forge and Vanilla use this technique ubiquitously.

Boilerplate:

If you don't post your logs/debug.log we can't help you. For curseforge you need to enable the forge debug.log in its minecraft settings. You should also post your crash report if you have one.

If there is no error in the log file and you don't have a crash report then post the launcher_log.txt from the minecraft folder. Again for curseforge this will be in your curseforge/minecraft/Install

Large files should be posted to a file sharing site like https://gist.github.com  You should also read the support forum sticky post.

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  • NetherNoah777 changed the title to Crash in my mod's fluid setup class. What am I doing wrong here? [solved]

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