here:

package drgmystery.darklight.events;

import net.minecraft.item.Item;
import net.minecraft.block.Blocks;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.item.ItemStack;
import net.minecraft.item.ItemUseContext;
import net.minecraft.util.ActionResult;
import net.minecraft.util.ActionResultType;
import net.minecraft.util.Hand;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;

public class DarklightPlaceTest extends Item{

    }

    @Override
        public ActionResult<ItemStack> useOn(PlayerEntity player, World world, Hand hand, BlockPos Pos){
            if(!world.isClientSide){
                 ;
                double x = player.position().x();
                double y = player.position().y();
                double z = player.position().z(); 
                BlockPos blockPos = new BlockPos(x, y, z);
                world.setBlockAndUpdate(blockPos, Blocks.DIAMOND_BLOCK.defaultBlockState());
            }
            return ActionResult.pass(null);
        }

    @Override
    public ActionResultType useOn(ItemUseContext p_195939_1_) {
        // TODO Auto-generated method stub
        return super.useOn(p_195939_1_);
    }

}

edit: sorry I only read: what has been generated the error?

Edited August 20, 20214 yr by DoctorG_Mystery

The method above is mine, the one below is auto gen, I can't use it because I can't write in the "PlayerEntity player, World world, Hand hand, BlockPos Pos" because then the override error comes back or gives Is there a possibility to declare the PlayerEntity etc. differently?

yes but less often with java more with c, c++, c# and Phyton

I never used overriding before. I never need it or it was do automaticly.

because I never used overriding before I ever can declare a methode parameter without some problems like this

errors at this points:

            if(!world.isClientSide){
                double x = player.position().x();
                double y = player.position().y();
                double z = player.position().z(); 
                BlockPos blockPos = new BlockPos(x, y, z);
                world.setBlockAndUpdate(blockPos, Blocks.DIAMOND_BLOCK.defaultBlockState());
            }

look better so?

        PlayerEntity player = null;
        World world = null;
        Hand hand = null;
        if(!world.isClientSide){
             ;
           double x = player.position().x();
           double y = player.position().y();
           double z = player.position().z(); 
           BlockPos blockPos = new BlockPos(x, y, z);
            world.setBlockAndUpdate(blockPos, Blocks.DIAMOND_BLOCK.defaultBlockState());
        }

no errors more

        PlayerEntity player;
        World world;
        Hand hand;
        
    @Override
    public ActionResultType useOn(ItemUseContext p_195939_1_) {

        if(!world.isClientSide){
             ;
           double x = player.position().x();
           double y = player.position().y();
           double z = player.position().z(); 
           BlockPos blockPos = new BlockPos(x, y, z);
            world.setBlockAndUpdate(blockPos, Blocks.DIAMOND_BLOCK.defaultBlockState());
        }
        return super.useOn(p_195939_1_);
    }

You can't just get the values from nowhere... use the parameter of the method, all the things you need are stored in that ItemUseContext, the placer (can be null!), world....etc

I make now a private final PlayerEntity player; private final Hand ...

there issn't any errors and that is also what is in ItemUseContext

I wanted to add that I am doing "learning by doing" and not only understand Forge mobing but also Java as well as the IDE Eclipse, so when I look very stupid (and I feel stupid to myself because I sometimes don't check it what you mean) so sorry for that and thank you for your time for my problem with Probgarmmiren ^^

I try to declare the player, hand and world and @poopoodice said in ItemUseContext is all I need

I try to declare it because the functions world hand and player will not work

Edited August 21, 20214 yr by DoctorG_Mystery

If I type in the useOn methode:

PlayerEntity Player;

...

there is an error because it isn't initialized

but how?

learn basic java

look: I am doing "learning by doing" and not only understand Forge mobing but also Java as well as the IDE Eclipse

tell me a keyword then i can learn it but if i don't know what to learn then i can't learn it

Edited August 21, 20214 yr by DoctorG_Mystery

maybe I now It but I don't now the keywords and because that I don't understand you, besides, I do not code with prescribed code in Library form

I see what data if gives me I see the data I want I can declare it in my class but I can't initializ "= null;" remove the error but is wrong

and doesn't it have to be a static method to call it?

it makes no sense we already have 74 replies and we haven't gone any further I think we should close the thread and forget about the whole thing.