I'm now coding since some time, but im newer to java and modding, so excuse me, if I'm making some weird mistakes.

 

Hello, some time ago, I started making a mod where the player has a new "awesome charge"- value that can affect him in different ways. I've created a capability for that charge which cost me a lot of time, because I didn't find a tutorial for such a thing in 1.15.2. There are some code fragments that I don't understand.

 

Now I'm having a big problem. As long as I'm in the world, the value can be edited via get, set, add and subtract very well, but when I quit and restart the world, The value is reset to default. 

 

I think it's most likely, that the values are just not being saved when I'm quittig the world, but I don't know, how to make it save the value.

 

Here's the code:

 

//The java interface

package com.FenrisFox86.syringe_mod.world.entityData;

public interface IAwesomeCharge {

    public void subtract(float points);
    public void add(float points);
    public void set(float points);

    public float get();
}

 

//The implementation

package com.FenrisFox86.syringe_mod.world.entityData;

public class AwesomeCharge implements IAwesomeCharge {

    private float points = 20.0F;

    public void subtract(float points) {

        this.points -= points;

        if (this.points < 0.0F) {
            this.points = 0.0F;
        }
    }

    public void add(float points) {

        this.points += points;

        if (this.points > 20.0F) {
            this.points = 20.0F;
        }
    }

    public void set(float points) {

        this.points = points;

        if (this.points < 0.0F) {
            this.points = 0.0F;
        }
        if (this.points > 20.0F) {
            this.points = 20.0F;
        }
    }

    public float get() {

        return this.points;
    }
}

 

the capability

package com.FenrisFox86.syringe_mod.world.entityData;

import net.minecraft.nbt.FloatNBT;
import net.minecraft.util.Direction;
import net.minecraftforge.common.capabilities.Capability;
import net.minecraftforge.common.capabilities.CapabilityInject;
import net.minecraftforge.common.capabilities.CapabilityManager;
import net.minecraftforge.common.capabilities.ICapabilitySerializable;
import net.minecraftforge.common.util.LazyOptional;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

public class ChargeCapability implements ICapabilitySerializable<FloatNBT> {

    @CapabilityInject(IAwesomeCharge.class)
    public static final Capability<IAwesomeCharge> CHARGE_CAP = null;

    private final LazyOptional<IAwesomeCharge> instance = LazyOptional.of(CHARGE_CAP::getDefaultInstance);

    //method to register the capability in main class without having too much text.
    public static void register() {

        CapabilityManager.INSTANCE.register(IAwesomeCharge.class, new ChargeStorage(), AwesomeCharge::new);
    }

    @Nonnull
    @Override
    public <T> LazyOptional<T> getCapability(@Nonnull Capability<T> cap, @Nullable Direction side) {
        return CHARGE_CAP.orEmpty(cap, instance);
    }

    @Override
    public FloatNBT serializeNBT() {

        return (FloatNBT) CHARGE_CAP.getStorage().writeNBT(
                CHARGE_CAP,
                instance.orElseThrow(() ->
                        new IllegalArgumentException("LazyOptional cannot be empty!")),
                null);
    }

    @Override
    public void deserializeNBT(FloatNBT nbt) {

        CHARGE_CAP.getStorage().readNBT(
                CHARGE_CAP,
                instance.orElseThrow(() ->
                        new IllegalArgumentException("LazyOptional cannot be empty!")),
                null, nbt);
    }
}

 

//the storage handler

package com.FenrisFox86.syringe_mod.world.entityData;

import net.minecraft.nbt.FloatNBT;
import net.minecraft.nbt.INBT;
import net.minecraft.util.Direction;
import net.minecraftforge.common.capabilities.Capability;

public class ChargeStorage implements Capability.IStorage<IAwesomeCharge> {

    @Override
    public INBT writeNBT(Capability<IAwesomeCharge> capability, IAwesomeCharge instance, Direction side) {

        return FloatNBT.valueOf(instance.get());
    }

    @Override
    public void readNBT(Capability<IAwesomeCharge> capability, IAwesomeCharge instance, Direction side, INBT nbt) {

        instance.set(((FloatNBT) nbt).getFloat());
    }
}

 

where I'm attaching the capability

public static final ResourceLocation CHARGE_CAP = new ResourceLocation(SyringeMod.MOD_ID, "charge");
    @SubscribeEvent
    public void attachCapabilitiesEntity(final AttachCapabilitiesEvent<Entity> event) {

        if(event.getObject() instanceof PlayerEntity)
            event.addCapability(CHARGE_CAP, new ChargeCapability());
    }

 

Output your values to a logger to test if that's true then. It could just as easily be something else.

 

Also, showing the entire class of where you registered it would help too.