Screen (handlers)

We need a few things,

A class that will register the screen handlers (ModScreenHandlers)
A screen
A screenhandler

ModScreenHandlers

In the main package, create a new package called screen, then create a new class I will call ModScreenHandlers. In that class, create a new void method called registerModScreenHandlers. Note: This class will have errors at first but once we create the screen(handlers), they will all go away. The method should look like this:

public static final ScreenHandlerType<ExampleScreenHandler> EXAMPLE_SCREEN_HANDLER =
    Registry.register(Registries.SCREEN_HANDLER, new Identifier(ExampleMod.MOD_ID, "example"),
            new ExtendedScreenHandlerType<>(ExampleScreenHandler::new));

public static void registerScreenHandlers() {
    ExampleMod.LOGGER.info("Registering Screen Handlers for " + ExampleMod.MOD_ID);
}

info

registerScreenHandlers() can be empty. I would recommend leaving this empty, otherwise you are going to have all those annoying, useless lines in your code!

Now we can create a screen and a screenhandler.

ModScreenHandlers​

ModScreenHandlers