Hello.

My problem is that I created a new replacement for Main Menu GUI:
 

package hu.test.gui;

import java.io.IOException;

import hu.test.utils.References;
import net.minecraft.client.gui.GuiButton;
import net.minecraft.client.gui.GuiScreen;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.fml.relauncher.SideOnly;
import net.minecraftforge.fml.relauncher.Side;

@SideOnly(Side.CLIENT)
public class GuiTestMainMenu extends GuiScreen {

	private static final ResourceLocation logo = new ResourceLocation(References.MOD_ID, "logo.png");
    private static final ResourceLocation background = new ResourceLocation(References.MOD_ID, "background.png");
	
    @Override
    public void drawScreen(int mouseX, int mouseY, float partialTicks) {
        drawDefaultBackground();
        drawCenteredString(this.fontRenderer, "thi is a test", 10, 10, 0xc80000);
        super.drawScreen(mouseX, mouseY, partialTicks);
    }

    @Override
    public void initGui() {
        super.initGui();
    }

    @Override
    protected void actionPerformed(GuiButton button) throws IOException {
        super.actionPerformed(button);
    }
    
    @Override
    protected void mouseClicked(int mouseX, int mouseY, int mouseButton) throws IOException {
        super.mouseClicked(mouseX, mouseY, mouseButton);
    }
	
}

And this is how I want to replace the MainMenu with mine.
 

@Mod.EventBusSubscriber
public static class EventHandlers
{
	@SideOnly(Side.CLIENT)
	@SubscribeEvent
	public void openGui(GuiOpenEvent event) {
		if (event.getGui() instanceof GuiOptions) {
				event.setGui(new GuiTestMainMenu());
				System.out.println("fastdqwefqwefqwefwqe");
		}
	}
}

The problem is that I experience no errors but I dont even see the log in the console.
What is the problem with my code?

1 minute ago, diesieben07 said:

Do no use @SideOnly. Your code checks for GuiOptions. Did you open that?

Oh sorry it shoudl be GuiMainMenu But I removed sideonly not working too.

3 minutes ago, diesieben07 said:

Post updated code. Is your event handler being called?

@Mod.EventBusSubscriber
	  public static class EventHandlers
	  {
		@SubscribeEvent
		public void openGui(GuiOpenEvent event) {
			if (event.getGui() instanceof GuiMainMenu) {
					event.setGui(new GuiKodaikMainMenu());
					System.out.println("fastdqwefqwefqwefwqe");
			}
		}
}

how do i know if its called?
sorry i have little experience in modding
I used to code plugins not mods, i just learning

8 minutes ago, diesieben07 said:

Use a debugger breakpoint?

I checked it seems its not called

4 minutes ago, diesieben07 said:

Oops, totally missed it. Your method needs to be static to use @EventBusSubscriber. Please re-read the event documentationn.

Thnak you!
Now it's working!