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Trouble editing the main menu


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I've made a class that extends MainMenuScreen, and I've set my gui to this class. I'm trying to override the init method in MainMenuScreen to change the logo and maybe some other things, but I'm unable to access all the private variables in MainMenuScreen. I'm not really sure what to do from here, any help is appreciated. I've looked around the forums and internet and couldn't really find much.

Edited by pvwatermelon
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  • pvwatermelon changed the title to Trouble editing the main menu
15 hours ago, diesieben07 said:


I was able to get the private variables of MainMenuScreen using reflection, but inside of init() there were calls to some private methods. I can't override them and just copy the code of the original methods because they're private.  Am I supposed to obtain the private methods through reflection too and then run the private methods that way? I ran into issues trying to that earlier but if that's the right way I'll keep at it.

Edited by pvwatermelon
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20 hours ago, diesieben07 said:

Reflection can call private methods, yes.

I've reflected all the private methods used in init() from MainMenuScreen and made sure all the variables used in init() are reflected, but my Minecraft still crashes at the beginning of the code of my NewMainMenu class with a null pointer exception. In the java documentation it says that a null pointer exception is thrown when the object that the method invoking is null, but I don't know what else I would invoke the methods on besides this.

import net.minecraft.client.gui.AccessibilityScreen;
import net.minecraft.client.gui.screen.*;
import net.minecraft.client.gui.widget.button.Button;
import net.minecraft.client.gui.widget.button.ImageButton;
import net.minecraft.client.renderer.RenderSkybox;
import net.minecraft.realms.RealmsBridgeScreen;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.text.TranslationTextComponent;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;
import java.lang.reflect.*;
import javax.annotation.Nullable;
import java.lang.reflect.*;
public class NewMainMenu extends MainMenuScreen {
    private String thesplash;
    private Button theresetDemoButton;
    private boolean therealmsNotificationsInitialized;
    private Screen therealmsNotificationsScreen;
    private int thecopyrightWidth;
    private int thecopyrightX;
    private long thefadeInStart;
    private static ResourceLocation theACCESSIBILITY_TEXTURE;
    private net.minecraftforge.client.gui.NotificationModUpdateScreen themodUpdateNotification;
    Method mycreateDemoMenuOptions;
    Method mycreateNormalMenuOptions;
    Method myrealmsNotificationsEnabled;
    boolean answer = false;

    public  void main(String[] args) {
        try {
            Field val = this.getClass().getSuperclass().getDeclaredField("splash");
            thesplash = (String) val.get(this);
            val = this.getClass().getSuperclass().getDeclaredField("copyrightWidth");
            thecopyrightWidth = (int) val.get(this);
            val = this.getClass().getSuperclass().getDeclaredField("ACCESSIBILITY_TEXTURE");
            theACCESSIBILITY_TEXTURE = (ResourceLocation) val.get(this);
            val = this.getClass().getSuperclass().getDeclaredField("copyrightX");
            thecopyrightX= (int) val.get(this);
            val = this.getClass().getSuperclass().getDeclaredField("realmsNotificationsInitialized");
            therealmsNotificationsInitialized = (boolean) val.get(this);
            val = this.getClass().getSuperclass().getDeclaredField("realmsNotificationsScreen");
            therealmsNotificationsScreen = (Screen) val.get(this);
            val = this.getClass().getSuperclass().getDeclaredField("theresetDemoButton");
            theresetDemoButton = (Button) val.get(this);
            val = this.getClass().getSuperclass().getDeclaredField("fadeInStart");
            thefadeInStart = (long) val.get(this);
            val = this.getClass().getSuperclass().getDeclaredField("modUpdateNotification");
            themodUpdateNotification = (net.minecraftforge.client.gui.NotificationModUpdateScreen) val.get(this);
            mycreateDemoMenuOptions= this.getClass().getSuperclass().getDeclaredMethod("createDemoMenuOptions", int.class, int.class);
            mycreateNormalMenuOptions= this.getClass().getSuperclass().getDeclaredMethod("createNormalMenuOptions", int.class, int.class);
            myrealmsNotificationsEnabled = this.getClass().getSuperclass().getDeclaredMethod("realmsNotificationsEnabled");

        } catch (Exception ex) {
    protected void init() {

        if (this.thesplash == null) {
            this.thesplash = this.minecraft.getSplashManager().getSplash();

        this.thecopyrightWidth = this.font.width("Copyright Mojang AB. Do not distribute!");
        this.thecopyrightX = this.width - this.thecopyrightWidth - 2;
        int i = 24;
        int j = this.height / 4 + 48;
        Button modButton = null;
        if (this.minecraft.isDemo()) {
            //this.createDemoMenuOptions(j, 24);
            try {
                mycreateDemoMenuOptions.invoke(this, j, 24);
            } catch (Exception ex) {

        } else {
            //this.createNormalMenuOptions(j, 24);
            try {
                mycreateNormalMenuOptions.invoke(this, j, 24);
            } catch (Exception ex) {
            modButton = this.addButton(new Button(this.width / 2 - 100, j + 24 * 2, 98, 20, new TranslationTextComponent("fml.menu.mods"), button -> {
                this.minecraft.setScreen(new net.minecraftforge.fml.client.gui.screen.ModListScreen(this));
        themodUpdateNotification = net.minecraftforge.client.gui.NotificationModUpdateScreen.init(this, modButton);

        this.addButton(new ImageButton(this.width / 2 - 124, j + 72 + 12, 20, 20, 0, 106, 20, Button.WIDGETS_LOCATION, 256, 256, (p_213090_1_) -> {
            this.minecraft.setScreen(new LanguageScreen(this, this.minecraft.options, this.minecraft.getLanguageManager()));
        }, new TranslationTextComponent("narrator.button.language")));
        this.addButton(new Button(this.width / 2 - 100, j + 72 + 12, 98, 20, new TranslationTextComponent("menu.options"), (p_213096_1_) -> {
            this.minecraft.setScreen(new OptionsScreen(this, this.minecraft.options));
        this.addButton(new Button(this.width / 2 + 2, j + 72 + 12, 98, 20, new TranslationTextComponent("menu.quit"), (p_213094_1_) -> {
        this.addButton(new ImageButton(this.width / 2 + 104, j + 72 + 12, 20, 20, 0, 0, 20, theACCESSIBILITY_TEXTURE, 32, 64, (p_213088_1_) -> {
            this.minecraft.setScreen(new AccessibilityScreen(this, this.minecraft.options));
        }, new TranslationTextComponent("narrator.button.accessibility")));
        if (this.minecraft.options.realmsNotifications && !this.therealmsNotificationsInitialized) {
            RealmsBridgeScreen realmsbridgescreen = new RealmsBridgeScreen();
            this.therealmsNotificationsScreen = realmsbridgescreen.getNotificationScreen(this);
            this.therealmsNotificationsInitialized = true;

        //if (this.realmsNotificationsEnabled()) {

        try {
            answer = (boolean) myrealmsNotificationsEnabled.invoke(this);
        } catch (Exception ex) {

        if (answer) {
            this.therealmsNotificationsScreen.init(this.minecraft, this.width, this.height);




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