I have done that
package terschegget.techrom.item;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.item.Item;
import terschegget.techrom.lib.ItemID;
import terschegget.techrom.lib.Reference;
public class TestItem extends Item
{
public TestItem(int id)
{
super(id);
this.setUnlocalizedName(ItemID.TESTITEM_ITEM_U_NAME);
this.setCreativeTab(CreativeTabs.tabMisc);
maxStackSize = 64;
this.setTextureName(Reference.MOD_ID + ":" + ItemID.TESTITEM_ITEM_U_NAME);
}
}