src/game/java/net/minecraft/world/item/FishingRodItem.java

package net.minecraft.world.item;

import net.minecraft.server.level.ServerLevel;
import net.minecraft.sounds.SoundEvents;
import net.minecraft.sounds.SoundSource;
import net.minecraft.stats.Stats;
import net.minecraft.world.InteractionHand;
import net.minecraft.world.InteractionResult;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.entity.projectile.FishingHook;
import net.minecraft.world.entity.projectile.Projectile;
import net.minecraft.world.item.enchantment.EnchantmentHelper;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.gameevent.GameEvent;

public class FishingRodItem extends Item {
    public FishingRodItem(Item.Properties p_41285_) {
        super(p_41285_);
    }

    @Override
    public InteractionResult use(Level p_41290_, Player p_41291_, InteractionHand p_41292_) {
        ItemStack itemstack = p_41291_.getItemInHand(p_41292_);
        if (p_41291_.fishing != null) {
            if (!p_41290_.isClientSide) {
                int i = p_41291_.fishing.retrieve(itemstack);
                itemstack.hurtAndBreak(i, p_41291_, LivingEntity.getSlotForHand(p_41292_));
            }

            p_41290_.playSound(
                null,
                p_41291_.getX(),
                p_41291_.getY(),
                p_41291_.getZ(),
                SoundEvents.FISHING_BOBBER_RETRIEVE,
                SoundSource.NEUTRAL,
                1.0F,
                0.4F / (p_41290_.getRandom().nextFloat() * 0.4F + 0.8F)
            );
            p_41291_.gameEvent(GameEvent.ITEM_INTERACT_FINISH);
        } else {
            p_41290_.playSound(
                null,
                p_41291_.getX(),
                p_41291_.getY(),
                p_41291_.getZ(),
                SoundEvents.FISHING_BOBBER_THROW,
                SoundSource.NEUTRAL,
                0.5F,
                0.4F / (p_41290_.getRandom().nextFloat() * 0.4F + 0.8F)
            );
            if (p_41290_ instanceof ServerLevel serverlevel) {
                int j = (int)(EnchantmentHelper.getFishingTimeReduction(serverlevel, itemstack, p_41291_) * 20.0F);
                int k = EnchantmentHelper.getFishingLuckBonus(serverlevel, itemstack, p_41291_);
                Projectile.spawnProjectile(new FishingHook(p_41291_, p_41290_, k, j), serverlevel, itemstack);
            }

            p_41291_.awardStat(Stats.ITEM_USED.get(this));
            p_41291_.gameEvent(GameEvent.ITEM_INTERACT_START);
        }

        return InteractionResult.SUCCESS;
    }
}