Hi.
I have a custom entity minecart_new and I can summon it in minecraft by typing /summon minecart:minecart_new. How can I imitate this command via forge? What code should I write? 
In minecraft I want it to be as follows: when player right click on custom item then command /summon minecart:minecart_new should be imitated. 
So my code now is 

@SubscribeEvent
	public void minecartItemRightClick(RightClickItem event) {
		
		if (event.getItemStack().getItem() == ItemInit.MINECARTNEW_ITEM.get()) {
			//imitate /summon minecart:minecart_new
		}
		
	}

Event hooking works fine I think. What should I type instead of //imitate /summon minecart:minecart_new? Thanks in advance!

show your Entity class and your registration 

16 minutes ago, Luis_ST said:

show your Entity class and your registration 

My entity class extends AbstractMinecart and code in it is almost equal to FurnaceMinecart class. 
 

public class Minecart_new extends AbstractMinecart {

    private static final EntityDataAccessor<Boolean> DATA_ID_FUEL = SynchedEntityData.defineId(MinecartFurnace.class, EntityDataSerializers.BOOLEAN);
    private int fuel;
    public double xPush;
    public double zPush;
    private static final Ingredient INGREDIENT = Ingredient.of(Items.APPLE, Items.CHARCOAL);

    public Minecart_new(EntityType<? extends Minecart_new> p_38552_, Level p_38553_) {
        super(p_38552_, p_38553_);
    }

    public AbstractMinecart.Type getMinecartType() {
        return AbstractMinecart.Type.FURNACE;
    }

    @Override
    protected void defineSynchedData() {
        super.defineSynchedData();
        this.entityData.define(DATA_ID_FUEL, false);
    }

    @Override
    public void tick() {
        super.tick();
        if (!this.level.isClientSide()) {
            if (this.fuel > 0) {
                --this.fuel;
            }

            if (this.fuel <= 0) {
                xPush = 0.0D;
                zPush = 0.0D;
            }

            this.setHasFuel(this.fuel > 0);
        }

        if (this.hasFuel() && this.random.nextInt(4) == 0) {
            this.level.addParticle(ParticleTypes.LARGE_SMOKE, this.getX(), this.getY() + 0.8D, this.getZ(), 0.0D, 0.0D, 0.0D);
        }

    }

    @Override
    protected double getMaxSpeed() {
        return (this.isInWater() ? 3.0D : 4.0D) / 20.0D;
    }

    @Override
    public float getMaxCartSpeedOnRail() {
        return 0.2f;
    }

    @Override
    public void destroy(DamageSource p_38560_) {
        super.destroy(p_38560_);
        if (!p_38560_.isExplosion() && this.level.getGameRules().getBoolean(GameRules.RULE_DOENTITYDROPS)) {
            this.spawnAtLocation(Blocks.FURNACE);
        }

    }

    @Override
    protected void moveAlongTrack(BlockPos p_38569_, BlockState p_38570_) {
        super.moveAlongTrack(p_38569_, p_38570_);
        Vec3 vec3 = this.getDeltaMovement();
        double d2 = vec3.horizontalDistanceSqr();
        double d3 = this.xPush * this.xPush + this.zPush * this.zPush;
        if (d3 > 1.0E-4D && d2 > 0.001D) {
            double d4 = Math.sqrt(d2);
            double d5 = Math.sqrt(d3);
            this.xPush = vec3.x / d4 * d5;
            this.zPush = vec3.z / d4 * d5;
        }

    }

    @Override
    protected void applyNaturalSlowdown() {
        double d0 = this.xPush * this.xPush + this.zPush * this.zPush;
        if (d0 > 1.0E-7D) {
            d0 = Math.sqrt(d0);
            this.xPush /= d0;
            this.zPush /= d0;
            Vec3 vec3 = this.getDeltaMovement().multiply(0.8D, 0.0D, 0.8D).add(this.xPush, 0.0D, this.zPush);
            if (this.isInWater()) {
                vec3 = vec3.scale(0.1D);
            }

            this.setDeltaMovement(vec3);
        } else {
            this.setDeltaMovement(this.getDeltaMovement().multiply(0.98D, 0.0D, 0.98D));
        }

        super.applyNaturalSlowdown();
    }

    @Override
    public InteractionResult interact(Player p_38562_, InteractionHand p_38563_) {
        InteractionResult ret = super.interact(p_38562_, p_38563_);
        if (ret.consumesAction()) return ret;
        ItemStack itemstack = p_38562_.getItemInHand(p_38563_);
        if (INGREDIENT.test(itemstack) && this.fuel+ 3600 <= 32000) {
            if (!p_38562_.getAbilities().instabuild) {
                itemstack.shrink(1);
            }

            this.fuel += 3600;
        }

        if (this.fuel > 0) {
            this.xPush = -(this.getX() - p_38562_.getX());
            this.zPush = -(this.getZ() - p_38562_.getZ());
        }

        return InteractionResult.sidedSuccess(this.level.isClientSide);
    }

    @Override
    protected void addAdditionalSaveData(CompoundTag p_38567_) {
        super.addAdditionalSaveData(p_38567_);
        p_38567_.putDouble("PushX", this.xPush);
        p_38567_.putDouble("PushZ", this.zPush);
        p_38567_.putShort("Fuel", (short)this.fuel);
    }

    @Override
    protected void readAdditionalSaveData(CompoundTag p_38565_) {
        super.readAdditionalSaveData(p_38565_);
        this.xPush = p_38565_.getDouble("PushX");
        this.zPush = p_38565_.getDouble("PushZ");
        this.fuel = p_38565_.getShort("Fuel");
    }


    protected boolean hasFuel() {
        return this.entityData.get(DATA_ID_FUEL);
    }


    protected void setHasFuel(boolean p_38577_) {
        this.entityData.set(DATA_ID_FUEL, p_38577_);
    }

    @Override
    public BlockState getDefaultDisplayBlockState() {
        return Blocks.FURNACE.defaultBlockState().setValue(FurnaceBlock.FACING, Direction.NORTH).setValue(FurnaceBlock.LIT, Boolean.valueOf(this.hasFuel()));
    }
/////////
    @Override
    public ItemStack getPickResult() {
        Item item = ItemInit.MINECARTNEW_ITEM.get();
        return new ItemStack(item);
    }
}

Registration of entity.

public class EntityInit {

    private EntityInit() {}

    public static final DeferredRegister<EntityType<?>> ENTITIES = DeferredRegister.create(ForgeRegistries.ENTITIES, minecart.MOD_ID);

    public static final RegistryObject<EntityType<Minecart_new>> MINECART_ENTITY = ENTITIES.register("minecart_new", () ->
            EntityType.Builder.of(Minecart_new::new, MobCategory.MISC).sized(0.98F, 0.7F)
                    .build(new ResourceLocation(minecart.MOD_ID,"minecart_new").toString()));


}

 

10 minutes ago, diesieben07 said:

Have you looked at MinecartItem like you were told previously.?

Yes I have, maybe if you ask this question then you mean I should use MinecartItem. But it requires AbstractMinecart.Type and because of it I can't use it, if I use Type.FURNACE_MINECART then my item will connects to vanilla furnace_minecart, not my custom one. 
Maybe then I should ask "what should I do to have MinecartItem useful for me?", maybe I can use it, but do not know how.
Thanks in advance.

33 minutes ago, diesieben07 said:

MinecartItem spawns minecarts. Look at how it does that. Adapt it to your needs.

I should override MinecartItem, alright?