我想在測試類里面測試collection里面的元素，但是get方法似乎只適用于ArrayList,/***@paramname*@paramdescription*@paramprice*/publicRecipe(Stringname,Stringdescription,doubleprice,Ingredient...ingredients){if(name==null||name.isEmpty()){thrownewIllegalArgumentException("namecan'tbenulloranemptystring");}this.name=name;if(description==null||description.isEmpty()){thrownewIllegalArgumentException("descriptioncan'tbenulloranemptystring");}this.description=description;if(price