ItemHandler:
public class ItemHandler {
/*Item variables*/
public static Item PoweredNetherStar;
public static void init(){
PoweredNetherStar = new ItemPoweredNetherStar("Powered_Nether_Star", CreativeTabs.MATERIALS);
}
public static void register(){
GameRegistry.register(PoweredNetherStar);
}
public static void registerRenders(){
registerRender(PoweredNetherStar);
}
public static void registerRender(Item item){
Minecraft.getMinecraft().getRenderItem().getItemModelMesher().register(item, 0, new ModelResourceLocation(item.getRegistryName(), "inventory"));
}
}
Item class:
public class ItemPoweredNetherStar extends ModItems{
public ItemPoweredNetherStar(String name, CreativeTabs tab) {
super(name, tab);
}
}
or just look here: http://couchdoescode.blogspot.de/2017/02/items.html
I've done nearly everything like there