[SOLVED][1.7.2]Eclipse wants me to cast my class to itself?

[jabelar]

Sorry this is more of a Java question.  But I have a custom item called ItemGoldenEgg that extends Item.  I'm trying to create a new one and assign it to a static instance field.  Anyway, Eclipse warns me that ItemGoldenEgg is an Item and needs to be cast into ItemGoldenEgg.  I don't understand why I would ever have to cast something as itself, but I'm weak on some Java concepts..

 

Anyway here is the line of code (it complains if I don't have the cast in bold below):

        MagicBeans.itemGoldenEgg = (ItemGoldenEgg) new ItemGoldenEgg().setUnlocalizedName("golden_egg").setTextureName("magicbeans:golden_egg");

 

And the declaration for the instance itemGoldenEgg is in my main class and is:

    public static ItemGoldenEgg itemGoldenEgg;

 

[Vtec234]

Sorry this is more of a Java question.  But I have a custom item called ItemGoldenEgg that extends Item.  I'm trying to create a new one and assign it to a static instance field.  Anyway, Eclipse warns me that ItemGoldenEgg is an Item and needs to be cast into ItemGoldenEgg.  I don't understand why I would ever have to cast something as itself, but I'm weak on some Java concepts..

 

Anyway here is the line of code (it complains if I don't have the cast in bold below):

        MagicBeans.itemGoldenEgg = (ItemGoldenEgg) new ItemGoldenEgg().setUnlocalizedName("golden_egg").setTextureName("magicbeans:golden_egg");

 

And the declaration for the instance itemGoldenEgg is in my main class and is:

    public static ItemGoldenEgg itemGoldenEgg;

 

Hello Jabelar!

Java does not want you to cast your ItemGoldenEgg to itself, it wants you to cast an Item to ItemGoldenEgg. What you are assigning to MagicBeans.itemGoldenEgg is not the object returned by your constructor, but rather the object returned by setTextureName(), which is the last method in that line, therefore what is returned by it is assigned to your variable. If you look at the definition for setTextureName(String par1Str), you can see that it returns an Item object. Java automatically casts object to their superclasses, like so:

Item randomItem = new ItemGoldenEgg(); 

but you need to manually cast it from a superclass to one of the inheriting classes, like so:

ItemGoldenEgg randomItem = (ItemGoldenEgg)new ItemGoldenEgg().setTextureName("TEXTURE");

 

Also, on a side note, you should probably just make the variable an Item, not an ItemGoldenEgg, and then cast it to your own class when you need to call your own methods.

Item itemGoldenEgg = new ItemGoldenEgg().setUnlocalizedName("golden_egg").setTextureName("magicbeans:golden_egg");
(ItemGoldenEgg)itemGoldenEgg.hatchEgg();

[jabelar]

Thanks guys. 

 

That makes sense.  I guess I need to be slightly more conscious of my method chaining and control the order like recommended by diesieben07.